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Magaji Ladan | Bayero University, Kano - Academia.edu

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Magaji Ladan

Bayero University, Kano, Pure And Industrial Chemistry, Faculty Member

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Papers by Magaji Ladan

Corrosion Protection of Mild Steel by Polyaniline/Tin-Doped Titania Nanocomposite

Journal of Nano Research

This study employed the template-free chemical oxidative polymerisation method to synthesise poly... more This study employed the template-free chemical oxidative polymerisation method to synthesise polyaniline (PANI) and polyaniline/tin-doped titania (PANI/Sn-doped TiO2) nanocomposite as corrosion inhibitors. FTIR and XRD were employed to characterise the chemical composition of the prepared samples. TEM and FESEM microscopy validated the presence of the PANI and that the Sn-doped TiO2 nanoparticle were successfully incorporated into PANI to form the nanocomposite. The synthesised materials were mixed in the polyvinyl butyral (PVB) binder, coated onto mild steel substrates, and exposed to 3.5 wt.% NaCl solution for 30 days. Altogether, three coating systems were tested, i.e., pure PVB, PVB + PANI, and PVB + PANI/Sn-doped TiO2. The corrosion parameters were measured via EIS and Tafel polarisation techniques. Overall, the PANI/Sn-doped TiO2 nanocomposite as a corrosion inhibitor effectively inhibited the corrosion of the mild steel, and its corrosion rate was 3.484 x 10-7 mm/year.

A Review on Industrial Effluents as Major Sources of Water Pollution in Nigeria.pdf

This review investigates the level of water pollution caused by industrial effluents in Nigeria w... more This review investigates the level of water pollution caused by industrial effluents in Nigeria with a view to provide useful information to the authorities on the management, control and investigation of pollution cases, water quality surveillance and forecasting water quality in the country. Literature on the subject matter was accessed through published and unpublished materials on the subject as well as browsing of related issues on the internet. The results show that industrial effluents account for several point sources of water pollution. While developed nations adopt stringent water quality requirements to control river pollution from point and non-point sources, the situation is different in most developing countries like Nigeria. Waste water treatment in Nigeria is not given the necessary priority it deserves and therefore, industrial wastes are discharged into receiving water bodies without treatment and the consequences of this include, among others, river pollution, los...

Enhanced amperometric detection of paracetamol by immobilized cobalt ion on functionalized MWCNTs - Chitosan thin film

Analytical biochemistry, Jan 15, 2018

In the present study, a nanocomposite of f-MWCNTs-chitosan-Co was prepared by the immobilization ... more In the present study, a nanocomposite of f-MWCNTs-chitosan-Co was prepared by the immobilization of Co(II) on f-MWCNTs-chitosan by a self-assembly method and used for the quantitative determination of paracetamol (PR). The composite was characterized by field emission scanning electron microscopy (FESEM) and energy dispersive x-ray analysis (EDX). The electroactivity of cobalt immobilized on f-MWCNTs-chitosan was assessed during the electro-oxidation of paracetamol. The prepared GCE modified f-MWCNTs/CTS-Co showed strong electrocatalytic activity towards the oxidation of PR. The electrochemical performances were investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV). Under favorable experimental conditions, differential pulse voltammetry showed a linear dynamic range between 0.1 and 400 μmol L with a detection limit of 0.01 μmol L for the PR solution. The fabricated sensor exhibited significant selectivity towar...

Corrosion protection of AISI 1018 steel using Co-doped TiO 2 /polypyrrole nanocomposites in 3.5% NaCl solution

Materials Chemistry and Physics, 2017

• Polymerization of pyrrole monomer in the presence of Co-doped TiO 2 decreases the size of the p... more • Polymerization of pyrrole monomer in the presence of Co-doped TiO 2 decreases the size of the polypyrrole nanotube (PPy NT). • The corrosion protection increases with the increase in PPy NT dispersion in the reaction medium. • The corrosion resistance of AISI 1018 steel coated with Co-doped TiO 2 /PPy NTCs is considerably higher. • The increased surface area of the TiO 2 /PPy with Co doping reduces the charge transfer across the electrolyte/AISI 1018 steel interface.

Ciprofloxacin as Corrosion Inhibitors for Mild Steel -Effects of Concentration and Temperature

Abstract:Studies on the corrosion inhibition potentials of ciprofloxacin were carried out using g... more Abstract:Studies on the corrosion inhibition potentials of ciprofloxacin were carried out using gravimetric, thermometric and scanning electron microscopy techniques. The inhibition efficiencies of ciprofloxacin for the corrosion of mild steel increased with increase in concentration but decreased with rise in temperature. The scanning electron microscopy shows that the damaging effect of the acid on the metal surface is greatly reduced with the presence of the inhibitor. This may probably be due to the formation of protective coverage by the inhibitor. Adsorption characteristics of the inhibitor has also been studied and it is found that ciprofloxacin inhibits the corrosion of mild steel by being adsorbed on the surface of mild steel by a physicaladsorption mechanism. The adsorption of ciprofloxacin on the mild steel surface was found to be spontaneous and obey the Langmuir adsorption isotherm model. Keywords:corrosion; mild steel; inhibitor; adsorption; ciprofloxacin.

Electrochemical investigation on the corrosion inhibition of mild steel by Quinazoline Schiff base compounds in hydrochloric acid solution

Journal of Colloid and Interface Science, 2017

The inhibitory effect of two Schiff bases 3-(5-methoxy-2-hydroxybenzylideneamino)-2-(-5-methoxy-2... more The inhibitory effect of two Schiff bases 3-(5-methoxy-2-hydroxybenzylideneamino)-2-(-5-methoxy-2hydroxyphenyl)-2,3-dihydroquinazoline-4(1H)-one (MMDQ), and 3-(5-nitro-2-hydroxybenzylidenea mino)-2(5-nitro-2-hydroxyphenyl)-2,3-dihydroquinazoline-4(1H)-one (NNDQ) on the corrosion of mild steel in 1 M hydrochloric acid were studied using mass loss, potentiodynamic polarization technique and electrochemical impedance spectroscopy measurements at ambient temperature. The investigation results indicate that the Schiff Bases compounds with an average efficiency of 92% at 1.0 mM of additive concentration have fairly effective inhibiting properties for mild steel in hydrochloric acid, and acts as mixed type inhibitor character. The inhibition efficiencies measured by all measurements show that the inhibition efficiencies increase with increase in inhibitor concentration. This reveals that the inhibitive mechanism of inhibitors were primarily due to adsorption on mild steel surface, and follow Langmuir adsorption isotherm. The temperature effect on the inhibition process in 1 M HCl with the addition of investigated Schiff bases was studied at a temperature range of 30-60°C, and the activation parameters

Electrochemical study on the corrosion protection behavior of conducting polymer nanocomposites / Magaji Ladan

Corrosion is a persistent issue faced by human-made structures made from metals and metal alloys.... more Corrosion is a persistent issue faced by human-made structures made from metals and metal alloys. Steel is used in many structural applications; however, it undergoes severe corrosion when exposed to corrosive media. Coatings are among the best methods to prevent metals and its alloys from the corrosion. However, traditional coating systems such as barrier coatings, metal-rich coatings, and coatings incorporating inhibitors have their setbacks. Conductive polymers such as polypyrrole and polyaniline were used for the corrosion protection of metals. Redox activity and the corrosion-inhibiting ion release ability of conducting polymers make them a good choice in place of hexavalent chromium compounds. However, conducting polymers are porous, stiff, inherent insoluble and low mechanical properties which make them inferior corrosion resistance materials. To tackle the problems associated with the conducting polymers and to harness maximum functionality out of them, conducting polymer na...

Effects of Treated Wood Flour on Physico-Mechanical Properties of Filled Natural Rubber

ChemSearch Journal, 2013

Wood flour was crushed in to particle size and given two surface treatments each with alkali and ... more Wood flour was crushed in to particle size and given two surface treatments each with alkali and 3-chloro-2 hydroxylpropyltrimethylammoniumchloride. The raw, alkali-treated and bonding agent treated fibers were used as natural rubber composites. The samples were used to produce fiber-reinforced natural rubber composite at varying filler loadings. Properties such as tensile strength, hardness and impact resistance of the composites were investigated. The tensile strength of the composites varied such that both the alkali-treated and cationized fillers recorded higher values than the untreated fillers. The impact strength and hardness properties were also found to be better in the modified than the untreated ones. This work has shown some general improvements arising from causticization and cationization of cellulosic filler as reinforcing material for natural rubber. Keywords : Cationization, Causticization, Mechanical properties, Natural rubber, Wood flour.

Influence of Auxiliaries in Dyeing of Wool with Acid Dyes

The influence of ionic auxiliaries on absorption of the Acid milling CI Acid Blue 80 (Sandolan Mi... more The influence of ionic auxiliaries on absorption of the Acid milling CI Acid Blue 80 (Sandolan Milling Blue N-BL 150) dye on wool fibre and on the colour changes of the dyed fabric has been investigated. The motivation behind this work is possible reduction in the dyeing temperature of conventional dyeing. The absorption and the colour characteristics of dyed fabric, including light and washing fastness were examined. An anionic and cationic auxiliaries based on Lissapol D (ICI), the sodium salt of cetyl-oleylsulphate and dispersol (CWL), an ethylene oxide-amine condensate respectively, enable dyeing at low temperature. Colour characteristics and improvement in light and wash fastness of the dyed fabrics was achieved. The variation of hue and levelness due to the use of these auxiliaries or the difference in dyeing temperatures is reported.

Dyeing and antibacterial finishing of cotton fabric using Diospyros mespiliformis leaves extracts

a Department of Pure and Industrial Chemistry, Bayero University, P.M.B. 3011, Kano, Nigeria b De... more a Department of Pure and Industrial Chemistry, Bayero University, P.M.B. 3011, Kano, Nigeria b Department of Chemistry, Faculty of Science, Federal University Dutse, P.M.B. 7156, Jigawa State, Nigeria c Department of Polymer Technology, Hussaini Adamu Federal Polytechnic, Kazaure, Jigawa, Nigeria d Department of Chemistry, Northwest University, P.M.B. 3220, Kano, Nigeria e Department of Chemical Sciences, Federal University Kashere, P.M.B. 0182, Gombe, Nigeria

Thermodynamic and Kinetic Study of Pb(II) Amputation by River Sediment

The presence of heavy metals in the aquatic environment has been a big deal to scientists due to ... more The presence of heavy metals in the aquatic environment has been a big deal to scientists due to their increased discharge, toxic nature, and other adverse effects on receiving waters. Even a very low concentration of lead in water is very toxic to aquatic life. Lead poisoning in human cause’s severe damage to the kidney, nervous system, reproductive system, liver, and brain causes sickness or death. The main sources of lead in water are the effluents of processing industries. The present research was aimed at modelling the use of sediment as an adsorbent for the removal of Pb 2+ ions by adsorption to obtain equilibrium, kinetics and thermodynamic parameters. The experimental results show that the equilibrium contact time was obtained within 60 minutes and the maximum adsorption capacity was found at 2g sediment and 1M Pb(NO 3 ) 2 system. The dynamic data fitted the pseudo-second-order kinetic model well. The Linear isotherm model agrees well with the equilibrium experimental data. ...

Polypyrrole-based nanocomposite adsorbents and its application in removal of radioactive materials

Conducting polymers form an important aspect of research in science and engineering due to their ... more Conducting polymers form an important aspect of research in science and engineering due to their various interesting properties, such as inherent high flexibility, structural diversity, light weight, and mechanical stability. Among them, polypyrrole due to its facile and easy synthesis at low cost, high electric conductivity, environmental friendliness, and ease of tailoring into nanocomposites has expanded its applications beyond the original scope of conventional polymers. Considering these properties, incorporation of nanofillers in polypyrrole for fabricating polypyrrole-based nanocomposites is currently receiving immense attention as beneficial resources for developing high-efficient adsorbents for addressing environmental issues. This chapter focuses on the synthesis of polypyrrole and its nanocomposites and the key issues for achieving high performance in the treatment of liquid radioactive wastes. Survey of literature on the recent studies on the uptake of radioactive materi...

Synthesis, Characterization and Application of Some Polymeric Dyes Derived From Monoazo Disperse Dyes

In this study, Some Monoazo disperse dyes namely, 4-arylazoaminophenols (AAPs) were synthesized v... more In this study, Some Monoazo disperse dyes namely, 4-arylazoaminophenols (AAPs) were synthesized via diazotization and coupling reactions and later, polycondensation of these dyes with formaldehyde in the presence of aqueous oxalic acid was carried out. The resulting polymeric dyes namely, (4-arylazoaminophenol- formaldehyde)s (PAAP-F)s as well as their low-molecular weight precursors were characterized by yield, melting point, color, solubility, viscosimetry, Proton Nuclear Magnetic Resonance spectroscopy, UV-visible spectroscopy and Infra red spectroscopy. Their dyeing performance on nylon and polyester were assessed using standard methods. The products were obtained in good yield and had low melting points The dyes were found to be soluble in chloroform and acetone, some were found to dissolve in ethanol and methanol, and generally insoluble in water. The dyeing on nylon and polyester had yellow shades with moderate to good light and wash fastness. Their rubbing fastnesses on nylo...

Polyaniline/graphene oxide/Zn-doped TiO2 nanocomposite coatings for the corrosion protection of carbon steel

Journal of Adhesion Science and Technology

This paper reports the synthesis of Polyaniline nanocomposites (PANI NCs) in the presence of grap... more

l-Glutamine-assisted synthesis of flower-like NiO and ball-flower-like NiO/Ag as an electrochemical sensor for lead(ii) detection

RSC Adv.

Flower-like NiO (F-NiO) and ball-flower-like NiO/Ag (BF-NiO–Ag) were synthesized in the presence ... more

Antibacterial Finishing of a Dyed Cotton Fabrics using Diospyros mespiliformis leaves extracts

In this study, leaves of Diospyros mespiliformis was extracted using ethanol and macerated with c... more In this study, leaves of Diospyros mespiliformis was extracted using ethanol and macerated with chloroform and ethyl acetate and later screened for antibacterial properties. The antibacterial analysis was performed qualitatively via disc diffusion method (AATCC 147) against Escherichia coli and Staphylococcus aureus as gram negative and gram positive bacteria respectively. The extract shows a significant activity on the isolated microorganisms as evidenced by a clear zone of inhibition, more so in the ethyl acetate petri dish indicating its potentials in preventing microbial growth. The extract was then used to dye cotton fabrics by pre-mordanting, simultaneous mordanting and post-mordanting processes. The materials were assessed for fastness properties, such as fastness to washing, light, pressing and rubbing based on AATCC standards. The results show a good to moderate fastness properties suggesting that extract of Diospyros mespiliformis can be successfully used for dyeing of cotton fabric in textile industries thereby reducing the pollution and environmental hazards associated with the use of conventional synthetic chemical dyes.

Corrosion inhibition activity of carbon steel in 1.0 M hydrochloric acid medium using Hammada scoparia extract: gravimetric and electrochemical study

Journal of Adhesion Science and Technology

Abstract The interest for the environment is becoming more demanding with regard to the use of to... more Abstract The interest for the environment is becoming more demanding with regard to the use of toxic and non-biodegradable substances and their impacts on different environments. Therefore, the need to develop ‘green inhibitor’ to preserve the nature from pollution is urgent. In this context, an investigation of medicinal plant (Hammada scoparia; HSP) as a corrosion inhibitor on C-steel in 1.0 M HCl solution has been implemented. To accomplish this work, several methods were used as weight loss, electrochemical measurements and surface analysis. Polarization curves show that HSP extract acts as mixed inhibitor type with cathodic predominance. The efficiency of C-steel protection increases with increasing the HSP extract concentration but decreases with the temperature in the range of 303–333 K. The effect of the temperature on the inhibition efficiency, as well determination of the different kinetic and activation parameters, make it possible to deduce a physisorption mechanism of HSP extract on the surface of C-steel. The theoretical fitting of different isotherms was also investigated. It was found the results obeyed the Langmuir isotherm. Surface analysis using FT-IR, UV-visible, scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and X-ray diffraction (XRD) allowed the clarification of the inhibition mechanism and the relative inhibition efficiency.

Lead Corrosion and Formation of Lead Oxides from a Lead-air Cell in Methanesulfonic Acid

Journal of New Materials for Electrochemical Systems

The corrosion of lead in methanesulfonic acid solution in the presence of a MnO2 air cathode in a... more The corrosion of lead in methanesulfonic acid solution in the presence of a MnO2 air cathode in a primary lead-air cell is in-vestigated. The highest power density of the lead-air cell is 2.8 mW cm-2. X-ray photoelectron spectroscopy and powder X-ray diffraction results demonstrate the formation of lead (II) oxide and lead (IV) dioxide on the air cathode after continuous discharge. Field emission scanning electron microscopy image shows that the surface coverage of lead (II) oxide and lead (IV) dioxide on the air cathode is only partial and will allow oxygen reduction.

Preparation, scratch adhesion and anti-corrosion performance of TiO2-MgO-BHA coating on Ti6Al4V implant by plasma electrolytic oxidation technique

Journal of Adhesion Science and Technology

Fabrication of platinum nitrogen-doped graphene nanocomposite modified electrode for the electrochemical detection of acetaminophen

Sensors and Actuators B: Chemical

Corrosion Protection of Mild Steel by Polyaniline/Tin-Doped Titania Nanocomposite

Journal of Nano Research

This study employed the template-free chemical oxidative polymerisation method to synthesise poly... more This study employed the template-free chemical oxidative polymerisation method to synthesise polyaniline (PANI) and polyaniline/tin-doped titania (PANI/Sn-doped TiO2) nanocomposite as corrosion inhibitors. FTIR and XRD were employed to characterise the chemical composition of the prepared samples. TEM and FESEM microscopy validated the presence of the PANI and that the Sn-doped TiO2 nanoparticle were successfully incorporated into PANI to form the nanocomposite. The synthesised materials were mixed in the polyvinyl butyral (PVB) binder, coated onto mild steel substrates, and exposed to 3.5 wt.% NaCl solution for 30 days. Altogether, three coating systems were tested, i.e., pure PVB, PVB + PANI, and PVB + PANI/Sn-doped TiO2. The corrosion parameters were measured via EIS and Tafel polarisation techniques. Overall, the PANI/Sn-doped TiO2 nanocomposite as a corrosion inhibitor effectively inhibited the corrosion of the mild steel, and its corrosion rate was 3.484 x 10-7 mm/year.

A Review on Industrial Effluents as Major Sources of Water Pollution in Nigeria.pdf

This review investigates the level of water pollution caused by industrial effluents in Nigeria w... more This review investigates the level of water pollution caused by industrial effluents in Nigeria with a view to provide useful information to the authorities on the management, control and investigation of pollution cases, water quality surveillance and forecasting water quality in the country. Literature on the subject matter was accessed through published and unpublished materials on the subject as well as browsing of related issues on the internet. The results show that industrial effluents account for several point sources of water pollution. While developed nations adopt stringent water quality requirements to control river pollution from point and non-point sources, the situation is different in most developing countries like Nigeria. Waste water treatment in Nigeria is not given the necessary priority it deserves and therefore, industrial wastes are discharged into receiving water bodies without treatment and the consequences of this include, among others, river pollution, los...

Enhanced amperometric detection of paracetamol by immobilized cobalt ion on functionalized MWCNTs - Chitosan thin film

Analytical biochemistry, Jan 15, 2018

In the present study, a nanocomposite of f-MWCNTs-chitosan-Co was prepared by the immobilization ... more In the present study, a nanocomposite of f-MWCNTs-chitosan-Co was prepared by the immobilization of Co(II) on f-MWCNTs-chitosan by a self-assembly method and used for the quantitative determination of paracetamol (PR). The composite was characterized by field emission scanning electron microscopy (FESEM) and energy dispersive x-ray analysis (EDX). The electroactivity of cobalt immobilized on f-MWCNTs-chitosan was assessed during the electro-oxidation of paracetamol. The prepared GCE modified f-MWCNTs/CTS-Co showed strong electrocatalytic activity towards the oxidation of PR. The electrochemical performances were investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV). Under favorable experimental conditions, differential pulse voltammetry showed a linear dynamic range between 0.1 and 400 μmol L with a detection limit of 0.01 μmol L for the PR solution. The fabricated sensor exhibited significant selectivity towar...

Corrosion protection of AISI 1018 steel using Co-doped TiO 2 /polypyrrole nanocomposites in 3.5% NaCl solution

Materials Chemistry and Physics, 2017

• Polymerization of pyrrole monomer in the presence of Co-doped TiO 2 decreases the size of the p... more • Polymerization of pyrrole monomer in the presence of Co-doped TiO 2 decreases the size of the polypyrrole nanotube (PPy NT). • The corrosion protection increases with the increase in PPy NT dispersion in the reaction medium. • The corrosion resistance of AISI 1018 steel coated with Co-doped TiO 2 /PPy NTCs is considerably higher. • The increased surface area of the TiO 2 /PPy with Co doping reduces the charge transfer across the electrolyte/AISI 1018 steel interface.

Ciprofloxacin as Corrosion Inhibitors for Mild Steel -Effects of Concentration and Temperature

Abstract:Studies on the corrosion inhibition potentials of ciprofloxacin were carried out using g... more Abstract:Studies on the corrosion inhibition potentials of ciprofloxacin were carried out using gravimetric, thermometric and scanning electron microscopy techniques. The inhibition efficiencies of ciprofloxacin for the corrosion of mild steel increased with increase in concentration but decreased with rise in temperature. The scanning electron microscopy shows that the damaging effect of the acid on the metal surface is greatly reduced with the presence of the inhibitor. This may probably be due to the formation of protective coverage by the inhibitor. Adsorption characteristics of the inhibitor has also been studied and it is found that ciprofloxacin inhibits the corrosion of mild steel by being adsorbed on the surface of mild steel by a physicaladsorption mechanism. The adsorption of ciprofloxacin on the mild steel surface was found to be spontaneous and obey the Langmuir adsorption isotherm model. Keywords:corrosion; mild steel; inhibitor; adsorption; ciprofloxacin.

Electrochemical investigation on the corrosion inhibition of mild steel by Quinazoline Schiff base compounds in hydrochloric acid solution

Journal of Colloid and Interface Science, 2017

The inhibitory effect of two Schiff bases 3-(5-methoxy-2-hydroxybenzylideneamino)-2-(-5-methoxy-2... more The inhibitory effect of two Schiff bases 3-(5-methoxy-2-hydroxybenzylideneamino)-2-(-5-methoxy-2hydroxyphenyl)-2,3-dihydroquinazoline-4(1H)-one (MMDQ), and 3-(5-nitro-2-hydroxybenzylidenea mino)-2(5-nitro-2-hydroxyphenyl)-2,3-dihydroquinazoline-4(1H)-one (NNDQ) on the corrosion of mild steel in 1 M hydrochloric acid were studied using mass loss, potentiodynamic polarization technique and electrochemical impedance spectroscopy measurements at ambient temperature. The investigation results indicate that the Schiff Bases compounds with an average efficiency of 92% at 1.0 mM of additive concentration have fairly effective inhibiting properties for mild steel in hydrochloric acid, and acts as mixed type inhibitor character. The inhibition efficiencies measured by all measurements show that the inhibition efficiencies increase with increase in inhibitor concentration. This reveals that the inhibitive mechanism of inhibitors were primarily due to adsorption on mild steel surface, and follow Langmuir adsorption isotherm. The temperature effect on the inhibition process in 1 M HCl with the addition of investigated Schiff bases was studied at a temperature range of 30-60°C, and the activation parameters

Electrochemical study on the corrosion protection behavior of conducting polymer nanocomposites / Magaji Ladan

Corrosion is a persistent issue faced by human-made structures made from metals and metal alloys.... more Corrosion is a persistent issue faced by human-made structures made from metals and metal alloys. Steel is used in many structural applications; however, it undergoes severe corrosion when exposed to corrosive media. Coatings are among the best methods to prevent metals and its alloys from the corrosion. However, traditional coating systems such as barrier coatings, metal-rich coatings, and coatings incorporating inhibitors have their setbacks. Conductive polymers such as polypyrrole and polyaniline were used for the corrosion protection of metals. Redox activity and the corrosion-inhibiting ion release ability of conducting polymers make them a good choice in place of hexavalent chromium compounds. However, conducting polymers are porous, stiff, inherent insoluble and low mechanical properties which make them inferior corrosion resistance materials. To tackle the problems associated with the conducting polymers and to harness maximum functionality out of them, conducting polymer na...

Effects of Treated Wood Flour on Physico-Mechanical Properties of Filled Natural Rubber

ChemSearch Journal, 2013

Wood flour was crushed in to particle size and given two surface treatments each with alkali and ... more Wood flour was crushed in to particle size and given two surface treatments each with alkali and 3-chloro-2 hydroxylpropyltrimethylammoniumchloride. The raw, alkali-treated and bonding agent treated fibers were used as natural rubber composites. The samples were used to produce fiber-reinforced natural rubber composite at varying filler loadings. Properties such as tensile strength, hardness and impact resistance of the composites were investigated. The tensile strength of the composites varied such that both the alkali-treated and cationized fillers recorded higher values than the untreated fillers. The impact strength and hardness properties were also found to be better in the modified than the untreated ones. This work has shown some general improvements arising from causticization and cationization of cellulosic filler as reinforcing material for natural rubber. Keywords : Cationization, Causticization, Mechanical properties, Natural rubber, Wood flour.

Influence of Auxiliaries in Dyeing of Wool with Acid Dyes

The influence of ionic auxiliaries on absorption of the Acid milling CI Acid Blue 80 (Sandolan Mi... more The influence of ionic auxiliaries on absorption of the Acid milling CI Acid Blue 80 (Sandolan Milling Blue N-BL 150) dye on wool fibre and on the colour changes of the dyed fabric has been investigated. The motivation behind this work is possible reduction in the dyeing temperature of conventional dyeing. The absorption and the colour characteristics of dyed fabric, including light and washing fastness were examined. An anionic and cationic auxiliaries based on Lissapol D (ICI), the sodium salt of cetyl-oleylsulphate and dispersol (CWL), an ethylene oxide-amine condensate respectively, enable dyeing at low temperature. Colour characteristics and improvement in light and wash fastness of the dyed fabrics was achieved. The variation of hue and levelness due to the use of these auxiliaries or the difference in dyeing temperatures is reported.

Dyeing and antibacterial finishing of cotton fabric using Diospyros mespiliformis leaves extracts

a Department of Pure and Industrial Chemistry, Bayero University, P.M.B. 3011, Kano, Nigeria b De... more a Department of Pure and Industrial Chemistry, Bayero University, P.M.B. 3011, Kano, Nigeria b Department of Chemistry, Faculty of Science, Federal University Dutse, P.M.B. 7156, Jigawa State, Nigeria c Department of Polymer Technology, Hussaini Adamu Federal Polytechnic, Kazaure, Jigawa, Nigeria d Department of Chemistry, Northwest University, P.M.B. 3220, Kano, Nigeria e Department of Chemical Sciences, Federal University Kashere, P.M.B. 0182, Gombe, Nigeria

Thermodynamic and Kinetic Study of Pb(II) Amputation by River Sediment

The presence of heavy metals in the aquatic environment has been a big deal to scientists due to ... more The presence of heavy metals in the aquatic environment has been a big deal to scientists due to their increased discharge, toxic nature, and other adverse effects on receiving waters. Even a very low concentration of lead in water is very toxic to aquatic life. Lead poisoning in human cause’s severe damage to the kidney, nervous system, reproductive system, liver, and brain causes sickness or death. The main sources of lead in water are the effluents of processing industries. The present research was aimed at modelling the use of sediment as an adsorbent for the removal of Pb 2+ ions by adsorption to obtain equilibrium, kinetics and thermodynamic parameters. The experimental results show that the equilibrium contact time was obtained within 60 minutes and the maximum adsorption capacity was found at 2g sediment and 1M Pb(NO 3 ) 2 system. The dynamic data fitted the pseudo-second-order kinetic model well. The Linear isotherm model agrees well with the equilibrium experimental data. ...

Polypyrrole-based nanocomposite adsorbents and its application in removal of radioactive materials

Conducting polymers form an important aspect of research in science and engineering due to their ... more Conducting polymers form an important aspect of research in science and engineering due to their various interesting properties, such as inherent high flexibility, structural diversity, light weight, and mechanical stability. Among them, polypyrrole due to its facile and easy synthesis at low cost, high electric conductivity, environmental friendliness, and ease of tailoring into nanocomposites has expanded its applications beyond the original scope of conventional polymers. Considering these properties, incorporation of nanofillers in polypyrrole for fabricating polypyrrole-based nanocomposites is currently receiving immense attention as beneficial resources for developing high-efficient adsorbents for addressing environmental issues. This chapter focuses on the synthesis of polypyrrole and its nanocomposites and the key issues for achieving high performance in the treatment of liquid radioactive wastes. Survey of literature on the recent studies on the uptake of radioactive materi...

Synthesis, Characterization and Application of Some Polymeric Dyes Derived From Monoazo Disperse Dyes

In this study, Some Monoazo disperse dyes namely, 4-arylazoaminophenols (AAPs) were synthesized v... more In this study, Some Monoazo disperse dyes namely, 4-arylazoaminophenols (AAPs) were synthesized via diazotization and coupling reactions and later, polycondensation of these dyes with formaldehyde in the presence of aqueous oxalic acid was carried out. The resulting polymeric dyes namely, (4-arylazoaminophenol- formaldehyde)s (PAAP-F)s as well as their low-molecular weight precursors were characterized by yield, melting point, color, solubility, viscosimetry, Proton Nuclear Magnetic Resonance spectroscopy, UV-visible spectroscopy and Infra red spectroscopy. Their dyeing performance on nylon and polyester were assessed using standard methods. The products were obtained in good yield and had low melting points The dyes were found to be soluble in chloroform and acetone, some were found to dissolve in ethanol and methanol, and generally insoluble in water. The dyeing on nylon and polyester had yellow shades with moderate to good light and wash fastness. Their rubbing fastnesses on nylo...

Polyaniline/graphene oxide/Zn-doped TiO2 nanocomposite coatings for the corrosion protection of carbon steel

Journal of Adhesion Science and Technology

This paper reports the synthesis of Polyaniline nanocomposites (PANI NCs) in the presence of grap... more

l-Glutamine-assisted synthesis of flower-like NiO and ball-flower-like NiO/Ag as an electrochemical sensor for lead(ii) detection

RSC Adv.

Flower-like NiO (F-NiO) and ball-flower-like NiO/Ag (BF-NiO–Ag) were synthesized in the presence ... more

Antibacterial Finishing of a Dyed Cotton Fabrics using Diospyros mespiliformis leaves extracts

In this study, leaves of Diospyros mespiliformis was extracted using ethanol and macerated with c... more In this study, leaves of Diospyros mespiliformis was extracted using ethanol and macerated with chloroform and ethyl acetate and later screened for antibacterial properties. The antibacterial analysis was performed qualitatively via disc diffusion method (AATCC 147) against Escherichia coli and Staphylococcus aureus as gram negative and gram positive bacteria respectively. The extract shows a significant activity on the isolated microorganisms as evidenced by a clear zone of inhibition, more so in the ethyl acetate petri dish indicating its potentials in preventing microbial growth. The extract was then used to dye cotton fabrics by pre-mordanting, simultaneous mordanting and post-mordanting processes. The materials were assessed for fastness properties, such as fastness to washing, light, pressing and rubbing based on AATCC standards. The results show a good to moderate fastness properties suggesting that extract of Diospyros mespiliformis can be successfully used for dyeing of cotton fabric in textile industries thereby reducing the pollution and environmental hazards associated with the use of conventional synthetic chemical dyes.

Corrosion inhibition activity of carbon steel in 1.0 M hydrochloric acid medium using Hammada scoparia extract: gravimetric and electrochemical study

Journal of Adhesion Science and Technology

Abstract The interest for the environment is becoming more demanding with regard to the use of to... more Abstract The interest for the environment is becoming more demanding with regard to the use of toxic and non-biodegradable substances and their impacts on different environments. Therefore, the need to develop ‘green inhibitor’ to preserve the nature from pollution is urgent. In this context, an investigation of medicinal plant (Hammada scoparia; HSP) as a corrosion inhibitor on C-steel in 1.0 M HCl solution has been implemented. To accomplish this work, several methods were used as weight loss, electrochemical measurements and surface analysis. Polarization curves show that HSP extract acts as mixed inhibitor type with cathodic predominance. The efficiency of C-steel protection increases with increasing the HSP extract concentration but decreases with the temperature in the range of 303–333 K. The effect of the temperature on the inhibition efficiency, as well determination of the different kinetic and activation parameters, make it possible to deduce a physisorption mechanism of HSP extract on the surface of C-steel. The theoretical fitting of different isotherms was also investigated. It was found the results obeyed the Langmuir isotherm. Surface analysis using FT-IR, UV-visible, scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and X-ray diffraction (XRD) allowed the clarification of the inhibition mechanism and the relative inhibition efficiency.

Lead Corrosion and Formation of Lead Oxides from a Lead-air Cell in Methanesulfonic Acid

Journal of New Materials for Electrochemical Systems

The corrosion of lead in methanesulfonic acid solution in the presence of a MnO2 air cathode in a... more The corrosion of lead in methanesulfonic acid solution in the presence of a MnO2 air cathode in a primary lead-air cell is in-vestigated. The highest power density of the lead-air cell is 2.8 mW cm-2. X-ray photoelectron spectroscopy and powder X-ray diffraction results demonstrate the formation of lead (II) oxide and lead (IV) dioxide on the air cathode after continuous discharge. Field emission scanning electron microscopy image shows that the surface coverage of lead (II) oxide and lead (IV) dioxide on the air cathode is only partial and will allow oxygen reduction.

Preparation, scratch adhesion and anti-corrosion performance of TiO2-MgO-BHA coating on Ti6Al4V implant by plasma electrolytic oxidation technique

Journal of Adhesion Science and Technology

Fabrication of platinum nitrogen-doped graphene nanocomposite modified electrode for the electrochemical detection of acetaminophen

Sensors and Actuators B: Chemical