Maleic anhydride-allylpropionate-styrene terpolymer has been modified with triethanolamine and co... more Maleic anhydride-allylpropionate-styrene terpolymer has been modified with triethanolamine and contains carboxylic acid, carbonyl, hydroxyl, ester groups and tret.nitrogen atom, all of which are capable of interacting with metal ions. Modified terpolymer has been used as an adsorbent to remove copper ions from aqueous solution. Effects of contact time, sorbent weight and initial copper (II) concentration on removal efficiency were tested and optimum conditions were evaluated. Langmuir and Freundlich isotherm models were employed to analyse the isotherm behaviours. It was found the equilibrium data were fitted well with Freundlich isotherm model, indicating a chemisorptions process. Langmuir monolayer adsorption capacity of sorbent was examined as 4.09 mmol g-1. Pseudo-first-order and pseudo-second-order models were employed to investigate kinetic behaviours. The kinetic data are best described by pseudo-second-order model. The obtained negative values of ΔG° and ΔH° are indicative o...
The present study investigated the adsorption of Cu from water solution using ammonium salt of th... more The present study investigated the adsorption of Cu from water solution using ammonium salt of the maleic acid–allylpropionate–styrene terpolymer, crosslinked with glycerin. Adsorption equilibrium, kinetics and thermodynamics have been investigated as a function of initial Cuions concentration, contact time, sorbent dosage and temperature. Equilibrium data were analyzed using Langmuir, Freundlich, Dubinin-Radushkevich and Temkin isotherm models. Kinetics studies showed that the adsorption is described with pseudo-second order reaction. The negative values of the ΔG and the positive value of the ΔH° (11.861kJ mole) indicate that the sorption process is spontaneous and endothermic in nature. The positive value of ΔS° (0.04375 kJ mole K) shows the increasing randomness during adsorption process. The results of this research showed that the adsorption of the Cu ions by ammonium salt of the cross-linked maleic acid-allylpropionate-styrene terpolymer occurred through chemical interaction ...
ABSTRACT Maleic Anhydride-Octene-1-Vinylbutyl Ether terpolymer has been synthesized via the radic... more ABSTRACT Maleic Anhydride-Octene-1-Vinylbutyl Ether terpolymer has been synthesized via the radical terpolymerization method which plays the role of matrix for ZnS nanocrystal synthesis. The synthesis process of ZnS nanocrystals was performed in N,N-dimethylformamide solution of terpolymer through the reaction of thiourea with zinc chloride. Synthesized terpolymer/ZnS nanocrystal composite was characterized using several methods like UV-visible spectroscopy, Energy Dispersive X-ray analysis, Raman spectroscopy and Transmission Electron Microscopy. Energy Dispersive X-ray spectroscopy results and Raman spectrum prove the formation of ZnS in terpolymer. Transmission electron microscopy images show that sizes of obtained ZnS particles are in nanoscale and do not exceed 5 nm. The room temperature UV-visible absorption spectra show a shift towards higher energies of the absorption edge which is appropriate for nanoparticles. Another inherent fact is the band gap of the ZnS nanocomposite which is bigger than that of bulk ZnS. The novelty of this work is the first time use of this terpolymer as the matrix for ZnS nanocrystal synthesis.
CuS nano particles synthesized by a sonication process were deposited onto oxidized mul-ti-wall c... more CuS nano particles synthesized by a sonication process were deposited onto oxidized mul-ti-wall carbon nanotubes (MWCNTs) dispersed in maleic anhydride octane 1 (MAO) copolymer matrix. MWCNTs were prepared by catalytic chemical vapor deposition from ethylene over a Co, Fe/alumina catalyst, MAO was grafted with oxidized MWCNTs under sonication at 353 K for 3 h. CuS nanoparticles were prepared from copper acetate dihydrate and thiocarbamide in this matrix while heating for 2 h. The resulting nanocomposite matrix featured uniform MWCNT dispersion and a peculiar foam-like morphology which was attributed to the effect of ultrasonic cavitation. The mean diameter of the obtained embedded hexagonal CuS nanoparticles was 3.2 nm. The optical band gap of the final product was calculated to be 2.28 eV which suggests that the CuS–MWCNT–MAO nanocom-posite can be evaluated as a potential solar protection material.
Fullerenes, Nanotubes and Carbon Nanostructures, 2018
Full Article Figures & data References Citations Metrics Reprints & Permissions Get access ABSTRA... more Full Article Figures & data References Citations Metrics Reprints & Permissions Get access ABSTRACT Effect of sonication time on the synthesis of the CdS nanoparticles within the matrix obtained through the covalent functionalization of multiwall carbon nanotube (MWCNT) with maleic anhydride (MA) – 1-octene copolymer was investigated. Cadmium chloride and thiourea were used as the raw materials. MWCNTs used for the matrix were synthesized by Catalytic Chemical Vapor Deposition using Fe-Co/Al2O3 as the catalyst. The obtained nanostructures were characterized by FTIR, XRD, Raman spectroscopy, TEM, SEM, TG and UV-Vis spectroscopy. Electrophysical properties of the polymer nanocomposites obtained using different periods of time for sonication were comparably investigated. The average CdS particle diameter was between 3.9–7.9 nm as confirmed independently by TEM and XRD. UV-Vis spectroscopy revealed that the obtained nanostructures are appropriate base materials for making optical devices.
Fullerenes, Nanotubes and Carbon Nanostructures, 2018
Full Article Figures & data References Citations Metrics Reprints & Permissions Get access ABSTRA... more Full Article Figures & data References Citations Metrics Reprints & Permissions Get access ABSTRACT Effect of sonication time on the synthesis of the CdS nanoparticles within the matrix obtained through the covalent functionalization of multiwall carbon nanotube (MWCNT) with maleic anhydride (MA) – 1-octene copolymer was investigated. Cadmium chloride and thiourea were used as the raw materials. MWCNTs used for the matrix were synthesized by Catalytic Chemical Vapor Deposition using Fe-Co/Al2O3 as the catalyst. The obtained nanostructures were characterized by FTIR, XRD, Raman spectroscopy, TEM, SEM, TG and UV-Vis spectroscopy. Electrophysical properties of the polymer nanocomposites obtained using different periods of time for sonication were comparably investigated. The average CdS particle diameter was between 3.9–7.9 nm as confirmed independently by TEM and XRD. UV-Vis spectroscopy revealed that the obtained nanostructures are appropriate base materials for making optical devices.
Maleic anhydride-allylpropionate-styrene terpolymer has been modified with triethanolamine and co... more Maleic anhydride-allylpropionate-styrene terpolymer has been modified with triethanolamine and contains carboxylic acid, carbonyl, hydroxyl, ester groups and tret.nitrogen atom, all of which are capable of interacting with metal ions. Modified terpolymer has been used as an adsorbent to remove copper ions from aqueous solution. Effects of contact time, sorbent weight and initial copper (II) concentration on removal efficiency were tested and optimum conditions were evaluated. Langmuir and Freundlich isotherm models were employed to analyse the isotherm behaviours. It was found the equilibrium data were fitted well with Freundlich isotherm model, indicating a chemisorptions process. Langmuir monolayer adsorption capacity of sorbent was examined as 4.09 mmol g-1. Pseudo-first-order and pseudo-second-order models were employed to investigate kinetic behaviours. The kinetic data are best described by pseudo-second-order model. The obtained negative values of ΔG° and ΔH° are indicative o...
The present study investigated the adsorption of Cu from water solution using ammonium salt of th... more The present study investigated the adsorption of Cu from water solution using ammonium salt of the maleic acid–allylpropionate–styrene terpolymer, crosslinked with glycerin. Adsorption equilibrium, kinetics and thermodynamics have been investigated as a function of initial Cuions concentration, contact time, sorbent dosage and temperature. Equilibrium data were analyzed using Langmuir, Freundlich, Dubinin-Radushkevich and Temkin isotherm models. Kinetics studies showed that the adsorption is described with pseudo-second order reaction. The negative values of the ΔG and the positive value of the ΔH° (11.861kJ mole) indicate that the sorption process is spontaneous and endothermic in nature. The positive value of ΔS° (0.04375 kJ mole K) shows the increasing randomness during adsorption process. The results of this research showed that the adsorption of the Cu ions by ammonium salt of the cross-linked maleic acid-allylpropionate-styrene terpolymer occurred through chemical interaction ...
ABSTRACT Maleic Anhydride-Octene-1-Vinylbutyl Ether terpolymer has been synthesized via the radic... more ABSTRACT Maleic Anhydride-Octene-1-Vinylbutyl Ether terpolymer has been synthesized via the radical terpolymerization method which plays the role of matrix for ZnS nanocrystal synthesis. The synthesis process of ZnS nanocrystals was performed in N,N-dimethylformamide solution of terpolymer through the reaction of thiourea with zinc chloride. Synthesized terpolymer/ZnS nanocrystal composite was characterized using several methods like UV-visible spectroscopy, Energy Dispersive X-ray analysis, Raman spectroscopy and Transmission Electron Microscopy. Energy Dispersive X-ray spectroscopy results and Raman spectrum prove the formation of ZnS in terpolymer. Transmission electron microscopy images show that sizes of obtained ZnS particles are in nanoscale and do not exceed 5 nm. The room temperature UV-visible absorption spectra show a shift towards higher energies of the absorption edge which is appropriate for nanoparticles. Another inherent fact is the band gap of the ZnS nanocomposite which is bigger than that of bulk ZnS. The novelty of this work is the first time use of this terpolymer as the matrix for ZnS nanocrystal synthesis.
CuS nano particles synthesized by a sonication process were deposited onto oxidized mul-ti-wall c... more CuS nano particles synthesized by a sonication process were deposited onto oxidized mul-ti-wall carbon nanotubes (MWCNTs) dispersed in maleic anhydride octane 1 (MAO) copolymer matrix. MWCNTs were prepared by catalytic chemical vapor deposition from ethylene over a Co, Fe/alumina catalyst, MAO was grafted with oxidized MWCNTs under sonication at 353 K for 3 h. CuS nanoparticles were prepared from copper acetate dihydrate and thiocarbamide in this matrix while heating for 2 h. The resulting nanocomposite matrix featured uniform MWCNT dispersion and a peculiar foam-like morphology which was attributed to the effect of ultrasonic cavitation. The mean diameter of the obtained embedded hexagonal CuS nanoparticles was 3.2 nm. The optical band gap of the final product was calculated to be 2.28 eV which suggests that the CuS–MWCNT–MAO nanocom-posite can be evaluated as a potential solar protection material.
Fullerenes, Nanotubes and Carbon Nanostructures, 2018
Full Article Figures & data References Citations Metrics Reprints & Permissions Get access ABSTRA... more Full Article Figures & data References Citations Metrics Reprints & Permissions Get access ABSTRACT Effect of sonication time on the synthesis of the CdS nanoparticles within the matrix obtained through the covalent functionalization of multiwall carbon nanotube (MWCNT) with maleic anhydride (MA) – 1-octene copolymer was investigated. Cadmium chloride and thiourea were used as the raw materials. MWCNTs used for the matrix were synthesized by Catalytic Chemical Vapor Deposition using Fe-Co/Al2O3 as the catalyst. The obtained nanostructures were characterized by FTIR, XRD, Raman spectroscopy, TEM, SEM, TG and UV-Vis spectroscopy. Electrophysical properties of the polymer nanocomposites obtained using different periods of time for sonication were comparably investigated. The average CdS particle diameter was between 3.9–7.9 nm as confirmed independently by TEM and XRD. UV-Vis spectroscopy revealed that the obtained nanostructures are appropriate base materials for making optical devices.
Fullerenes, Nanotubes and Carbon Nanostructures, 2018
Full Article Figures & data References Citations Metrics Reprints & Permissions Get access ABSTRA... more Full Article Figures & data References Citations Metrics Reprints & Permissions Get access ABSTRACT Effect of sonication time on the synthesis of the CdS nanoparticles within the matrix obtained through the covalent functionalization of multiwall carbon nanotube (MWCNT) with maleic anhydride (MA) – 1-octene copolymer was investigated. Cadmium chloride and thiourea were used as the raw materials. MWCNTs used for the matrix were synthesized by Catalytic Chemical Vapor Deposition using Fe-Co/Al2O3 as the catalyst. The obtained nanostructures were characterized by FTIR, XRD, Raman spectroscopy, TEM, SEM, TG and UV-Vis spectroscopy. Electrophysical properties of the polymer nanocomposites obtained using different periods of time for sonication were comparably investigated. The average CdS particle diameter was between 3.9–7.9 nm as confirmed independently by TEM and XRD. UV-Vis spectroscopy revealed that the obtained nanostructures are appropriate base materials for making optical devices.
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