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Papers by parviz aberoomand azar

Materials Science in Semiconductor Processing, 2022

In this study, the ability to remove methylene blue cation pigment using wood-plastic composite c... more In this study, the ability to remove methylene blue cation pigment using wood-plastic composite containing high density polyethylene and wood powder as a recycled material was studied. The effect of some important parameters such as pH, adsorbent amount and contact time were investigated. Adsorption efficiencies for methylene blue was maximized at alkaline pH. Adsorption capacity increased with increasing adsorbent amount and contact time. The value of R2 in Langmuir model was equal to 1 and the separation factor for 0.5 and 1 g of adsorbent were 0.09 and 0.1, respectively. Given that the methylene blue adsorption data were more consistent with the Langmuir isotherm model, it can be stated that the wood-plastic composite probably has uniform adsorption surfaces and the adsorption process occurred in homogeneous system on the adsorbent surface. Based on the results of this study, it was observed that this composite is a suitable adsorbent for removing methylene blue from aqueous solu...

Journal of Non-Crystalline Solids, 2021

Abstract The bioactive glass (BG) system of SiO2-P2O5 CaO-SrO-Ag2O-ZnO was synthesized by the sol... more Abstract The bioactive glass (BG) system of SiO2-P2O5 CaO-SrO-Ag2O-ZnO was synthesized by the sol-gel route. Transmission electron microscopy (TEM) analysis showed that the mean particle size of as-synthesized nanoglass was ~50 nm. The effect of zinc and silver content on cell viability, antibacterial properties, and the formation of hydroxyapatite (HA) on the BGs were investigated. The synthesized compounds were soaked in simulated body fluid (SBF) for 21 days to study the bioactivity of the new glass composition. Results demonstrated that samples BG and BG-A2Z3 showed higher bioactivities in comparison with other specimens. The formation of HA was observed on the first day of soaking. In order to investigate the biocompatibility and antibacterial properties of the samples, MTT assay and antibacterial tests against E. coli were performed. The BG-A2Z3 sample showed the optimal properties of antibacterial, biocompatibility, and bioactivity that is the best candidate for orthopedic applications.

Frontiers in Chemistry, 2020

In the present research, a new biocompatible electrode is proposed as a rapid and direct glucose ... more In the present research, a new biocompatible electrode is proposed as a rapid and direct glucose biosensing technique that improves on the deficiencies of fast clinical devices in laboratory investigations. Nano-ZnO (nanostructured zinc oxide) was sputtered by reactive direct current magnetron sputtering system on a precovered fluorinated tin oxide (FTO) conductive layer. Spin-coated polyvinyl alcohol (PVA) at optimized instrumental deposition conditions was applied to prepare the effective medium for glucose oxidase enzyme (GOx) covalent immobilization through cyanuric chloride (GOx/nano-ZnO/PVA/FTO). The electrochemical behavior of glucose on the fabricated GOx/nano-ZnO/PVA/FTO biosensor was investigated by I-V techniques. In addition, field emission scanning electron microscopy and electrochemical impedance spectroscopy were applied to assess the morphology of the modified electrode surface. The I-V results indicated good sensitivity for glucose detection (0.041 mA per mM) within 0.2-20 mM and the limit of detection was 2.0 µM. We believe that such biodevices have good potential for tracing a number of biocompounds in biological fluids along with excellent accuracy, selectivity, and precise analysis. The fast response time of the fabricated GOx/nano-ZnO/PVA/FTO biosensor (less than 3 s) could allow most types of real-time analysis.

Journal of Heterocyclic Chemistry, 2020

Journal of Analytical Methods in Chemistry, 2018

Journal of Nanostructure in Chemistry, 2019

The present study deals with the preparation of silver (Ag) and iron (Fe) nanoparticles, extracte... more The present study deals with the preparation of silver (Ag) and iron (Fe) nanoparticles, extracted from AgNO 3 and FeSO 4 •7H 2 O solutions, respectively. For this, the aqueous extract of Erodium cicutarium was used. The Ag and Fe nanoparticles were characterized by several techniques such as X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), energy dispersive X-ray (EDX) spectrometer, UV-visible, and Fourier transform infrared (FTIR) spectroscopy. FE-SEM images showed that the Ag and Fe particles had nearly spherical morphology with diameters less than 100 nm. Low amounts of impurity and different chemicals in the prepared nanoparticles were confirmed by EDX spectrometers. Furthermore, different functional groups in the nanoparticles were indicated using FTIR spectrum. Antibacterial activity of the Ag and Fe nanoparticles was evaluated by minimum inhibitory concentration (MIC) for E. coli and S. aureus bacteria. Two parameters such as the concentration of Ag and Fe nanoparticles (X 1) and pH (X 2) were modeled by the use of the response surface methodology (RSM). These experiments were carried out as a central composite design (CCD) consisting of 13 experiments. The results showed that the concentration of Ag and Fe nanoparticles had a better effect on antibacterial activity. Under optimal conditions-with concentrations of Ag and Fe nanoparticles at 399.53 and 397.38 (μg/mL) and pH values of 8.20 and 8.39, respectively-the bacterial growth inhibition halo was found to have the highest diameter.

International Journal of Biological Macromolecules, 2018

This research aims at elaborating on the construction of a novel nanostructured copper oxide (Nan... more This research aims at elaborating on the construction of a novel nanostructured copper oxide (Nano-CuO) sputtered thin film on the conductive fluorinated-tin oxide (FTO) layer that was exploited to immobilize glucose oxidase (GOx) enzyme via chitosan for developing impedimetric glucose biosensing. The distinct Nano-CuO thin film was fabricated by reactive DC magnetron sputtering system at the optimized instrumental deposition conditions. The FTO/Nano-CuO/Chitosan/GOx biosensor containing several layers afforded excellent microenvironment for rapid biocatalytic reaction to glucose. Field emission-scanning electron microscopy (FE-SEM), Ultraviolet-Visible spectroscopy (UV-Vis), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) were established the morphology of modified electrode's surface and electrochemical behavior of glucose on the fabricated biosensor. Characterization of the surface morphology and roughness of CuO thin film by FE-SEM exhibits cavities of the nanoporous film as an effective biosensing area for covalent enzyme immobilization. Invented FTO/Nano-CuO/Chitosan/GOx biosensor was employed for glucose determination using the impedimetric technique. The impedimetric outcomes display high sensitivity for glucose (0.261 kΩ per mM) detection within 0.2-15 mM and limit of detection as 27 µM. The declared biosensor has been applied as a careful, noncomplicated, and exact biosensor for recognition of glucose in the real samples analysis.

Journal of Separation Science, 2017

A high-performance metal oxide-polymer magnetite/polyethylene glycol nanocomposite was prepared a... more A high-performance metal oxide-polymer magnetite/polyethylene glycol nanocomposite was prepared and coated in situ on the surface of the optical fiber by sol-gel technology. The magnetite nanoparticles as nanofillers were synthesized by co-precipitation method and bonded with polyethylene glycol as polymer. The chemically bonded coating was evaluated for the headspace-solid phase microextraction of some environmentally important volatile organic compounds, from aqueous samples in combination with gas chromatography and mass spectrometry. The prepared fiber was characterized by scanning electron microscopy and Fourier transform infrared spectroscopy. The mass ratio of nanofiller and polymer on the Journal of Separation Science Fe 3 O 4 /polyethylene glycol nanocomposite as a solid-phase microextraction … M. Farjaminezhad, et al.

Journal of Liquid Chromatography & Related Technologies, 2017

This is an open-access article distributed under the terms of the Creative Commons Attribution Li... more This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium for non-commercial purposes, provided the original author and source are credited.

The synthesis of Nickel Nanoparticles by reduction of Nickel Nitrate Hexahydrate with Hydrazine H... more The synthesis of Nickel Nanoparticles by reduction of Nickel Nitrate Hexahydrate with Hydrazine Hydrate in an aqueous solution of Benzethonium Chloride as a cationic surfactant and Polyvinylpyrrolidone (PVP) as an emulsifier under ultrasonic irradiation was studied. In this project, the effect of changing some efficient factors such as temperature, reductant concentration and type of surface active agent in size distribution of Nickel Nanoparticles were investigated. The best results were obtained for temperature 50 °C, 45 minutes ultrasonic irradiation, mole ratio of Hydrazine Hydrate to Nickel Nitrate 12.5 and concentration of Polyvinylpyrrolidone (PVP) 0.025 M. With increasing the temperature, PVP could restrict growing of Nickel Nanoparticles better than Benzethonium Chloride. In this work, Nickel Nanoparticles by mean diameter of (2.5-5) nm with sonochemical method were synthesized and experimental results were characterized by TEM, SEM and X-ray diffraction.

This work concentrates on the growth of carbon nanowalls (CNWs) using hot filament chemical vapou... more This work concentrates on the growth of carbon nanowalls (CNWs) using hot filament chemical vapour depo-sition (HF-CVD) technique on a glass substrate coated with Al nanocatalyst. A combination of CH 4 /NH 3 /H 2 and C 2 H 2 /NH 3 /H 2 renders the growth of carbon nanostructures such as diamond nanocrystals, carbon nanowalls, and carbon nanotubes. Parameters affecting the growth of CNTs such as C 2 H 2 flow ratio, deposition time, and tempera-ture are investigated. Low temperature plasma is applied for deposition of Al nanocatalyst on the glass substrate. Surface morphology of the substrate is observed by atomic force microscopy (AFM). Samples are characterized by scanning electron microscopy and Raman spectroscopy. One of important conclusions in this work is that the growth of diamond nanocrystals and CNTs depend on the hydrocarbon gas species in the fed gas and process para-meters, respectively. It is also determined that, an increase of the hydrocarbon gas flow rate from 10 sccm...

$Research paper thumbnail of Comparison of three analytical methods for the extraction of the volatile fraction from stem and leaf of Helichrysum Aucheri$

Journal of Magnetism and Magnetic Materials, 2015

A new method has been developed for the separation/preconcentration of trace level cadmium ions u... more A new method has been developed for the separation/preconcentration of trace level cadmium ions using diphenyl carbazone/sodium dodecyl sulfate immobilized on magnetic nanoparticle Fe 3 O 4 as a new sorbent SPE and their determination by flame atomic absorption spectrometry (FAAS). Synthesized nanoparticle was characterized by scanning electron microscope (SEM) and transmission electron microscope (TEM). Various influencing parameters on the separation and preconcentration of trace level cadmium ions such as, pH value, amount of nanoparticles, amount of diphenyl carbazone, condition of eluting solution, the effects of matrix ions were examined. The cadmium ions can be eluted from the modified magnetic nanoparticle using 1 mol L À 1 HCl as a desorption reagent. The detection limit of this method for cadmium was 3.71 ng ml À 1 and the R.S.D. was 0.503% (n ¼6). The advantages of this new method include rapidity, easy preparation of sorbents and a high concentration factor. The proposed method has been applied to the determination of Cd ions at trace levels in real samples such as, green tea, rice, tobacco, carrot, lettuce, ginseng, spice, tap water, river water, sea water with satisfactory results.

Journal of Nanostructure in Chemistry, 2014

The capability of the adsorption of 2-chlorophenol (2-CPh) and 2,4-dichlorophenol (2,4-DCPh) from... more The capability of the adsorption of 2-chlorophenol (2-CPh) and 2,4-dichlorophenol (2,4-DCPh) from aqueous solutions with mesoporous silica material MCM-48 after functionalizing with amine groups, such as 3-(trimethoxysilyl)propyl amine and tetraethylenepentamine, was investigated in this study. It was found that amino-modified ordered mesoporous silica materials show significant adsorption for 2-CPh and 2,4-DCPh. This is possible due to the alkaline and acid interactions among the amine functional groups and chlorophenols. The adsorbents were characterized by X-ray diffraction, nitrogen adsorption-desorption isotherms and Fourier transform infrared. Batch adsorption studies were done to study the effect of various parameters like chemical modification, pH, contact time, adsorbent dose and initial concentration. It was found that adsorption of 2-CPh and 2,4-DCPh depends upon the solution pH. Adsorption data were modeled with the Langmuir and Freundlich adsorption isotherms. The data fitted the Freundlich isotherm model better than Langmuir. The kinetics analysis revealed that the overall adsorption process was successfully fitted with the pseudo-first-order kinetic model.

The TiO 2 /ZnO nanocomposite as a photocatalyst was prepared with different molar ratios of ZnO u... more The TiO 2 /ZnO nanocomposite as a photocatalyst was prepared with different molar ratios of ZnO using the sol-gel method. The structures and properties were recognized with Fourier transform infra-red spectroscopy (FT-IR), scanning electron microscopy (SEM), and X-ray diffraction (XRD) methods. The XRD study exhibited that the crystallization behavior of the nanocomposites was associated with the molar ratios of ZnO. The SEM images indicated that with increasing the molar ratio of TiO 2 /ZnO until 50:10, regular morphology can be seen. It should be of interest for catalytic purposes since it expectantly improves the surface area. Furthermore, the photocatalytic activity of the synthesized nanocomposites was investigated for decolorization of Methylene blue (MB) in water under UV irradiation in a batch reactor. The results revealed that the photocatalytic activity of nanocomposite with 50:10 M ratio of TiO 2 /ZnO was the best.

Journal of Essential Oil Research, 2004

Water-distilled essential oils from the leaves and flowers of Anthemis altissima (L.) var. altiss... more Water-distilled essential oils from the leaves and flowers of Anthemis altissima (L.) var. altissima, aerial parts of Conyza canadensis (L.) Cronq. and Grantia aucheri Boiss. were analyzed by GC/MS. β-Thujone (33.7% and 19.7%, respectively) was found to be the major constituent in the leaf and flower oil of Anthemis altissima. (E)-β-Farnesene (14.6%), spathulenol (14.1%) and limonene (12.3%) were the prodominant

Journal of Essential Oil Research, 2006

Historically, one of the key problems in neglected disease drug discovery has been identifying ne... more Historically, one of the key problems in neglected disease drug discovery has been identifying new and interesting chemotypes. Phenotypic screening of the malaria parasite, Plasmodium falciparum has yielded almost 30,000 submicromolar hits in recent years. To make this collection more accessible, a collection of 400 chemotypes has been assembled, termed the Malaria Box. Half of these compounds were selected based on their drug-like properties and the others as molecular probes. These can now be requested as a pharmacological test set by malaria biologists, but importantly by groups working on related parasites, as part of a program to make both data and compounds readily available. In this paper, the analysis and selection methodology and characteristics of the compounds are described.

Journal of Environmental Protection, 2013

Recently, many attempts have been made to use carbon nanotubes in analytical chemistry, especiall... more Recently, many attempts have been made to use carbon nanotubes in analytical chemistry, especially in adsorption of heavy metal ions from water. In this study, multiwalled carbon nanotubes (MWCNTs) were functionalized with tris(2aminoethyl) amine. The functionalized nanoparticles were characterized using Fourier transform infrared (FTIR), thermal gravimetric analyzer (TGA), elemental analysis, and Raman spectroscopy. The results revealed that the functionalization reaction was successfully accomplished. Lead adsorption from water was carried out using functionalized MWCNTs and measured by flame atomic absorption spectrometry (FAAS). The effects of pH, shaking time, initial metal ion concentration, and adsorbent dosage on the adsorption process were studied via batch method. The results obtained showed that removal of lead ions strongly depended on the pH. Desorption study revealed that lead ions adsorbed on the functionalized MWCNTs could be desorbed at pH < 3 due to breakage of complexes formed on the sorbent surface. Maximum adsorption capacity of the sorbent under the optimal conditions was 43 mg/g. This favorable adsorption capacity suggests that functionalized carbon nanotubes can be applied for removal of lead from water solutions. The data obtained were fitted with the Langmuir and Freundlich isotherm adsorption models and Langmuir model showed better agreement with the experimental data.