Papers by Md. Maksudur Rahman Khan
Catalytic performance and antimicrobial activity of Mg(OH)2/MgO colloidal nanoparticles in alkyd resin nanocomposite derived from palm oil
Polymer Bulettin, 2019
Colloidal Mg(OH)2/MgO nanoparticles were successfully produced in glycerol medium in the presence... more Colloidal Mg(OH)2/MgO nanoparticles were successfully produced in glycerol medium in the presence of hydrazine and subsequently was characterized by XRD. The as-prepared colloidal suspension in glycerol was used for the glycerolysis reaction with palm oil succeeded by polyesterification reaction with phthalic anhydride to prepare the palm oil-based alkyd resin nanocomposite where the Mg(OH)2/MgO nanoparticles catalysed the reactions. The well-dispersion of Mg(OH)2/MgO nanoparticles in the reaction mixture formed a stable suspension which effectively elevated the rate of reaction of both alcoholysis and polyesterification as compared to conventional NaOH catalysed reactions. The optimum reaction condition of the catalysts was observed at 0.04 wt% of Mg(OH)2/MgO. Alkyd resin nanocomposite formation was verified through FTIR, ¹³C NMR and ¹H NMR. The presence of the Mg(OH)2/MgO nanoparticles in the resin matrix significantly improved the antimicrobial activity as evidenced by Kirby–Bauer Method. Thereby, the formulation of Mg(OH)2/MgO nanoparticles in glycerol medium was proved to be an effective route as compared to traditional NaOH homogeneous base catalyzed system.
Kinematic study of reducing sugar production from rice straw by raw wood-rotting enzyme strain
Journal of Chemical Engineering, 2014
Electricity generation from readily biodegradable organic substrates accompanied by decolorizatio... more Electricity generation from readily biodegradable organic substrates accompanied by decolorization of azo dye was investigated using a Microbial fuel cell (MFC). Biodegradation was the dominant mechanism of the dye removal, and glucose was the optimal substrate for Red Cibacron-2G (RC) decolorization. Batch experiments were conducted to evaluate the performance of the MFC. As compared to traditional anaerobic technology higher decolorization efficiency was achieved by MFC. Effect of initial dye concentration and external resistance on power generation were studied. Polarization experiments were also directed to find the maximum power density. Maximum Power density of 100mW/m 2 (1.04A/m 2 ) was recorded at optimum operating conditions.
Preparation and Characterization of Radiation Grafted Proton Exchange Membranes of LLDPE
Advanced Materials Research, 2010
... and Technology, Bangladesh Atomic Energy Commission, PO Box 3787, Dhaka, Bangladesh aemail: m... more ... and Technology, Bangladesh Atomic Energy Commission, PO Box 3787, Dhaka, Bangladesh aemail: mrkhancep ... Fabrication of PEM can be used as an alternative to the perflourinated ... membranes and proposes LLDPE based PEM by radiation grafting onto LLDPE films. ...
Irradiated sodium-alginate/poly(ethylene oxide) blend films improved by methyl acrylate monomer
Journal of Applied Polymer Science, 2016
Sodium alginate (SA)-based poly(ethylene oxide) (PEO) blend films were improved by methyl acrylat... more Sodium alginate (SA)-based poly(ethylene oxide) (PEO) blend films were improved by methyl acrylate (MA) monomer and γ irradiation toward practical application. The films were prepared by a casting method and modified by glycerol (Gol) and mustard oil (MO). The SA-based films were successfully produced with γ irradiation (12 kGy) with 10% PEO, 15% Gol, 20% MO, and 7% MA on a mass basis as optimized. The tensile strength (TS), tear strength (TT), elongation at break (EB), Young's modulus, moisture content, water vapor permeability (WVP), and structural properties of the blended films were determined. The thermal properties of the films were characterized by thermogravimetric analysis, dynamic mechanical analysis, and differential scanning calorimetry, and the structural features were examined with Fourier transform infrared spectroscopy. The ultimate results of this study show a rather remarkable enhancement in the tensile properties (30% TS and 67% TT) and reduction in EB (40%) of the SA-based films with MA addition and γ irradiation. The as-prepared SA-based films demonstrated considerable reductions in the moisture content and WVP and also conferred a desired stability of the films.
Electricity generation form pretreated palm oil mill effluent using Klebsiella Variicola as an inoculum in Microbial fuel cell
2016 4th International Conference on the Development in the in Renewable Energy Technology (ICDRET), 2016
Control of biodegradability for natural fibre based nanocomposite: as a function of impregnated copper nanoparticle
RSC Adv., 2016
Effect of polymer cations on photoluminescence properties of blue emitting alkaline-earth metals and silicon based phosphors
Polish Journal of Chemistry, 2007
"Efficient blue emitting phosphors were prepared by depositing mixed hydroxides of Ca, Sr, B... more "Efficient blue emitting phosphors were prepared by depositing mixed hydroxides of Ca, Sr, Ba, Mg, Eu over spherical SiO2 particles from tetra-ethyl-orthosilicate (TEOS) pre-coated with polycations (polyethyleneimine: PEI) followed by calcination at 1200C in a reducing atmosphere. The prepared phosphor showed intense blue emission, which can be ascribed to 4f 7-4f 65d interconfiguration transitions of Eu2+ ions. In contrast, the luminescence intensity of the phosphor was much decreased when prepared without polycations. It was suggested that negatively charged hydroxides are deposited on positively charged SiO2 surfaces pre-coated with polycations through electrostatic self-assembly interaction. The common formula of the prepared phosphors is AMgSi2O6:Eu2+ (A= Ca, Sr, Ba or fraction of Ca and Sr), where alkaline-earth/Si = 1, the each entire sample was prepared by treating with polycations and without polycations."
Removal of dark blue-GL from wastewater using water hyacinth: a study of equilibrium adsorption isotherm
Http Dx Doi Org 10 1080 19443994 2014 950996, Aug 26, 2014
The present investigation demonstrates that water hyacinth root is a potential adsorbent for the ... more The present investigation demonstrates that water hyacinth root is a potential adsorbent for the removal of dark blue-GL dye from wastewater by batch process. Various operating parameters such as the adsorption capacity, initial dye concentration, contact time, effect of pH, and adsorbent dosage were examined at different experimental conditions. The effect of pH and dye concentration found to be crucial, have been optimized, and the maximum recovery (~90%) was detected at pH 3 and concentration 150 ppm. The separation of dark blue-GL is proportionally related to the adsorbent dosage, and up to 77% dye was recovered for the dose 1.5 g/L. Langmuir adsorption isotherm model of the adsorption process was carried out at the equilibrium concentration of dark blue-GL uptake, and the corresponding data were analyzed by the least square methods. Kinetic parameters calculated from the tentative data could be fitted well to a pseudo-second-order kinetic model. These results point out aptness of the adsorbent in the niche area due to high adsorption capacity (~24 g/kg) and can be applied in the execution of dark blue-GL-enriched wastewater.
Effect of CuO Nanoparticle on Mechanical and Thermal Properties of Palm Oil Based Alkyd/Epoxy Resin Blend
Procedia Chemistry, 2015
Sulfuric disazo dye stabilized copper nanoparticle composite mixture: Synthesis and Characterization
RSC Adv., 2016
MnO2/CNT as ORR Electrocatalyst in Air-Cathode Microbial Fuel Cells
Procedia Chemistry, 2015
Investigation of Polymer Degradation by Adding Magnesium
International Journal of Polymer Analysis and Characterization, 2015
The effect of alkali metal magnesium on polymer degradation of physico-mechanical properties of r... more The effect of alkali metal magnesium on polymer degradation of physico-mechanical properties of radiation-vulcanized natural rubber latex (RVNRL) films was investigated. RVNRL films were prepared by the addition of Mg of different concentrations (0–30 ppm) to natural rubber latex and irradiation with various radiation doses (0–20 kGy). The radiation doses were optimized (12 kGy), and the adverse effect of Mg was studied against a reference film prepared without metal. Tensile strength, tear strength, and cross-linking density of the irradiated rubber films were decreased with increasing metal ion concentrations and decreasing radiation doses. The mechanical properties of the films were reduced by nearly 10% for 30 ppm Mg ions and at the optimum dose. In contrast, elongation at break, permanent set, and swelling ratio of the films were increased at the same conditions. The maximum tensile and tear strengths of irradiated rubber films without additive were 29.33 MPa and 47.95 N/mm, respectively, at a radiation dose of 12 kGy, and these values were about six times higher than those of blank samples. With the addition of Mg, the corresponding values decrease continuously, and the minimum values were found to be 26.35 MPa and 42.675 N/mm, respectively. The effect of divalent alkali metal on polymer chain scission can be explained by the classical electron concept reported in this article.
Catalytic coatings, method for forming the same, and their application
The preparation of Pt nanoparticles by methanol and citrate
Journal of Colloid and Interface Science, Jul 15, 2006
Platinum nanoparticles of 2-3 nm average size and ca. +/-2 nm distribution can be successfully pr... more Platinum nanoparticles of 2-3 nm average size and ca. +/-2 nm distribution can be successfully prepared by methanol reduction while using sodium citrate as the stabilizer. Sol formation was investigated by UV-visible spectroscopy and EXAFS (extended X-ray absorption fine structure spectroscopy). The formation of Pt nanoparticles was confirmed by the presence of Pt-Pt bonding in the solution after a certain induction period in methanol-reduced sol with or without citrate. The possible two-step reduction of Pt(IV) was revealed by correlating EXAFS, UV-visible spectra and pH data. The presence of citrate resulted in a smaller Pt-Pt coordination number and a slower sol formation process. All these results prove that citrate acted as the stabilizer in this synthesis.
Synthesis and characterization of CaFe 2 O 4 catalyst for oleic acid esterification
RSC Adv., 2015
Physicochemical and micromechanical investigation of nanocopper impregnated fibre reinforced nanocomposite
RSC Adv., 2015
Tailoring base catalyzed synthesis of palm oil based alkyd resin through CuO nanoparticles
RSC Adv., 2015
Desalination and Water Treatment
The present work demonstrates tea dust (TD) as a potential low-cost adsorbent for the
removal of... more The present work demonstrates tea dust (TD) as a potential low-cost adsorbent for the
removal of crystal violet (CV) from aqueous solution by batch adsorption technique.
Reaction kinetics and isotherm studies were carried out under various conditions of initial
dye concentration, contact time, adsorbent dosage, and pH. The adsorbent was characterized
by scanning electron microscopy, Fourier transform infrared spectroscopy (FTIR) and
Brunauer–Emmett–Teller. FTIR results showed complexation and ion exchange appeared to
be the principle mechanism for CV adsorption. The adsorption isotherm data were fitted to
Langmuir and Freundlich equations; and the maximum adsorption capacity was found to
be 175.4 mg/g. The removal of CV by TD followed the unified approach model. Therefore,
TD can be employed as an efficient and cost-effective adsorbent in industrial wastewater
treatment for the removal of basic dyes.
Gamma-Irradiated Gelatin-Based Films Modified by HEMA for Medical Application
International Journal of Polymer Analysis and Characterization, 2015
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Papers by Md. Maksudur Rahman Khan
removal of crystal violet (CV) from aqueous solution by batch adsorption technique.
Reaction kinetics and isotherm studies were carried out under various conditions of initial
dye concentration, contact time, adsorbent dosage, and pH. The adsorbent was characterized
by scanning electron microscopy, Fourier transform infrared spectroscopy (FTIR) and
Brunauer–Emmett–Teller. FTIR results showed complexation and ion exchange appeared to
be the principle mechanism for CV adsorption. The adsorption isotherm data were fitted to
Langmuir and Freundlich equations; and the maximum adsorption capacity was found to
be 175.4 mg/g. The removal of CV by TD followed the unified approach model. Therefore,
TD can be employed as an efficient and cost-effective adsorbent in industrial wastewater
treatment for the removal of basic dyes.