Hamidreza Ghafouri Taleghani | University of Mazandaran (original) (raw)

Papers by Hamidreza Ghafouri Taleghani

Research paper thumbnail of Efficient Removal of Copper Ion from Aqueous Solution using Crosslinked Chitosan Grafted with Polyaniline

International Journal of Engineering, 2021

A high-performance adsorbent was produced by grafting polyaniline onto biopolymer chitosan. T... more A high-performance adsorbent was produced by grafting polyaniline onto biopolymer chitosan. The morphological structure of cross-linked chitosan grafted with polyaniline was studied by scanning electron microscopy. Functional groups of the synthesized adsorbent were identified by Fourier- transform infrared. The performance of the prepared adsorbent was examined by batch adsorption experiments. The adsorption studies were performed with different operating parameters such as contact time, initial pH, adsorbent dosage and temperature. To evaluate adsorption isotherms, Freundlich, Langmuir and Dubinin-Radushkevich models were fitted to obtained data and the isotherm parameters were determined. Kinetics of the adsorption was studied by pseudo-first-order and pseudo-second-order models. It was observed that the obtained data were fitted more accurately with the pseudo-second-order model than the pseudo-first-order model. At optimum conditi...

Research paper thumbnail of Effect of Synthesis Conditions on the Morphology of Polyaniline

Asian Journal of Chemistry

Polyaniline was prepared in aqueous medium by using various synthesis conditions. The polyaniline... more Polyaniline was prepared in aqueous medium by using various synthesis conditions. The polyaniline nanoparticles were characterized in terms of their morphology, particle size, conductivity and chemical structure. The results indicate that the morphology, particle size and conductivity of nanoparticles are dependent the synthesis conditions. The chemical structure of the products was determined by FTIR spectroscopy.

Research paper thumbnail of Effect of Surfactant on Morphology and Conductivity of Polyaniline Nanoparticles Prepared in Water-Tetrahydrofuran Solution

ABSTRACT Polyaniline nanoparticles were synthesized in a water/tetrahydrofuran solution by using ... more ABSTRACT Polyaniline nanoparticles were synthesized in a water/tetrahydrofuran solution by using KIO3 as an oxidant in the presence of various surfactants such as hydroxypropylcellulose (HPC), poly(vinyl alcohol) (PVA) and sodium dodecylbenzenesulfonate (DBSNa). The effect of type and concentration of surfactant on the morphology have been investigated. Scanning electron microscopy was used to characterize the morphology of polyaniline. The results indicate that small and spherical nanoparticles can be obtained using PVA (6 g/L). Also better conductivity obtained when DBSNa (6 g/L) was used as surfactant. The chemical structure of products determined by fourier transform infrared spectroscopy (FTIR). The results show that the type of surface active agent affects the intensity of peaks.

Research paper thumbnail of Synthesis of novel white flake polyaniline

Synthetic Metals, 2012

A novel polyaniline have been successfully prepared by in situ emulsion polymerization using KIO ... more A novel polyaniline have been successfully prepared by in situ emulsion polymerization using KIO 3 as an oxidant. White polyaniline was observed after 3 h the color of the polyaniline is usually black or green. This change in polyaniline color has led to an interest in its use for display devices, packaging and other applications. Scanning electron microscopy was used to characterize the morphology of polyaniline. The chemical structure of products was determined by Fourier Transform Infrared Spectroscopy (FTIR) and UV-vis spectroscopy. The results show that the type of surface active agent affects the intensive of peaks. This process leading to white flake polyaniline plate with 0.015-140 m particle size and approximate yield of 40%.

Research paper thumbnail of Preparation and characterization of PAn/NiO nanocomposite using various surfactants

Synthetic Metals, 2011

Conducting nanocomposite of NiO-PAn has been prepared in the aqueous medium using polyvinyl alcoh... more Conducting nanocomposite of NiO-PAn has been prepared in the aqueous medium using polyvinyl alcohol and hydroxypropylcellulose as a surfactant. The conductivity of the composites was measured as a function of the NiO concentration in reaction solution. Scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and electrical resistivity proved that NiO affect the properties of composite.

Research paper thumbnail of A general finite volume based numerical algorithm for hydrocarbon reservoir simulation using blackoil model

Purpose-This paper presents a detailed algorithm for simulating three-dimensional hydrocarbon res... more Purpose-This paper presents a detailed algorithm for simulating three-dimensional hydrocarbon reservoirs using the blackoil model.

Research paper thumbnail of Efficient Removal of Copper Ion from Aqueous Solution using Crosslinked Chitosan Grafted with Polyaniline

International Journal of Engineering, 2021

A high-performance adsorbent was produced by grafting polyaniline onto biopolymer chitosan. T... more A high-performance adsorbent was produced by grafting polyaniline onto biopolymer chitosan. The morphological structure of cross-linked chitosan grafted with polyaniline was studied by scanning electron microscopy. Functional groups of the synthesized adsorbent were identified by Fourier- transform infrared. The performance of the prepared adsorbent was examined by batch adsorption experiments. The adsorption studies were performed with different operating parameters such as contact time, initial pH, adsorbent dosage and temperature. To evaluate adsorption isotherms, Freundlich, Langmuir and Dubinin-Radushkevich models were fitted to obtained data and the isotherm parameters were determined. Kinetics of the adsorption was studied by pseudo-first-order and pseudo-second-order models. It was observed that the obtained data were fitted more accurately with the pseudo-second-order model than the pseudo-first-order model. At optimum conditi...

Research paper thumbnail of Effect of Synthesis Conditions on the Morphology of Polyaniline

Asian Journal of Chemistry

Polyaniline was prepared in aqueous medium by using various synthesis conditions. The polyaniline... more Polyaniline was prepared in aqueous medium by using various synthesis conditions. The polyaniline nanoparticles were characterized in terms of their morphology, particle size, conductivity and chemical structure. The results indicate that the morphology, particle size and conductivity of nanoparticles are dependent the synthesis conditions. The chemical structure of the products was determined by FTIR spectroscopy.

Research paper thumbnail of Effect of Surfactant on Morphology and Conductivity of Polyaniline Nanoparticles Prepared in Water-Tetrahydrofuran Solution

ABSTRACT Polyaniline nanoparticles were synthesized in a water/tetrahydrofuran solution by using ... more ABSTRACT Polyaniline nanoparticles were synthesized in a water/tetrahydrofuran solution by using KIO3 as an oxidant in the presence of various surfactants such as hydroxypropylcellulose (HPC), poly(vinyl alcohol) (PVA) and sodium dodecylbenzenesulfonate (DBSNa). The effect of type and concentration of surfactant on the morphology have been investigated. Scanning electron microscopy was used to characterize the morphology of polyaniline. The results indicate that small and spherical nanoparticles can be obtained using PVA (6 g/L). Also better conductivity obtained when DBSNa (6 g/L) was used as surfactant. The chemical structure of products determined by fourier transform infrared spectroscopy (FTIR). The results show that the type of surface active agent affects the intensity of peaks.

Research paper thumbnail of Synthesis of novel white flake polyaniline

Synthetic Metals, 2012

A novel polyaniline have been successfully prepared by in situ emulsion polymerization using KIO ... more A novel polyaniline have been successfully prepared by in situ emulsion polymerization using KIO 3 as an oxidant. White polyaniline was observed after 3 h the color of the polyaniline is usually black or green. This change in polyaniline color has led to an interest in its use for display devices, packaging and other applications. Scanning electron microscopy was used to characterize the morphology of polyaniline. The chemical structure of products was determined by Fourier Transform Infrared Spectroscopy (FTIR) and UV-vis spectroscopy. The results show that the type of surface active agent affects the intensive of peaks. This process leading to white flake polyaniline plate with 0.015-140 m particle size and approximate yield of 40%.

Research paper thumbnail of Preparation and characterization of PAn/NiO nanocomposite using various surfactants

Synthetic Metals, 2011

Conducting nanocomposite of NiO-PAn has been prepared in the aqueous medium using polyvinyl alcoh... more Conducting nanocomposite of NiO-PAn has been prepared in the aqueous medium using polyvinyl alcohol and hydroxypropylcellulose as a surfactant. The conductivity of the composites was measured as a function of the NiO concentration in reaction solution. Scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and electrical resistivity proved that NiO affect the properties of composite.

Research paper thumbnail of A general finite volume based numerical algorithm for hydrocarbon reservoir simulation using blackoil model

Purpose-This paper presents a detailed algorithm for simulating three-dimensional hydrocarbon res... more Purpose-This paper presents a detailed algorithm for simulating three-dimensional hydrocarbon reservoirs using the blackoil model.