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Open Access Article
1 - H3PW12O40 and Nano-sized Titania Supported on Urea Formaldehyde Resin for Photo catalytic Decolorization of Dye Pollutants in Aqueous Solution
Hossein Salavati Marzieh Mousavi-Dashti Mousavi-DashtiIn this work, H3PW12O40 (PPT) and nano-sized titania supported on urea formaldehyde (UF) resinwas prepared via an impregnation method. The prepared sample was characterized by X-raydiffraction (XRD), UV-Vis spectrophotometer, Fourier transform infrared spectroscopy (FT- MoreIn this work, H3PW12O40 (PPT) and nano-sized titania supported on urea formaldehyde (UF) resinwas prepared via an impregnation method. The prepared sample was characterized by X-raydiffraction (XRD), UV-Vis spectrophotometer, Fourier transform infrared spectroscopy (FT-IR),scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The photocatalytic activity of the PPT/TiO2/UF sample was evaluated by the decolorization of BromothymolBlue (BB), Direct Yellow12 (DY) and Texas Red (TR) dye solutions under UV-Vis and visiblelight irradiation. The optical property of the PPT/TiO2/UF sample was evaluated by UV-Visspectrum. The effect of photocatalyst dosage and dye concentration on photo catalyticdecolorization of dyes was investigated. Photo catalytic efficiency of the PPT/TiO2/UF sample wascompared with TiO2/UF sample. Moreover, the reusability of the sample was examined. Manuscript profile -
Open Access Article
2 - Inhibition of Mild Steel Corrosion in Sulfuric Acid Solution by 2-Hydropyrimidine-2-Thione Derivative
Laya Nejati Moghadam Effat Jamalizadeh Zahra Hassani Amir Hossein JafariThe corrosion inhibition potential and efficacy of 2-hydropyrimidine-2-thione derivative on mildsteel in 0.5 M sulfuric acid solution was investigated using electrochemical polarization and FTIRspectroscopic techniques. In addition, docking studies were carried out as t MoreThe corrosion inhibition potential and efficacy of 2-hydropyrimidine-2-thione derivative on mildsteel in 0.5 M sulfuric acid solution was investigated using electrochemical polarization and FTIRspectroscopic techniques. In addition, docking studies were carried out as theoretical investigationof adsorption inhibitor on iron surface. The results of polarization studies indicate the exceptionallystrong efficiency of this compound as an inhibitor in H2SO4 solution. The electrochemical studies toelucidate the mechanism indicated adsorption obeying the Langmuir isotherm to be the main modeof action. The FTIR results indicated the presence of inhibitor molecules to formation protectivelayer on the surface of mild steel. Theoretical findings show that the most stable states ofcompound/iron system are via the molecular sites containing S atoms, ester groups and aromaticrings. Manuscript profile -
Open Access Article
3 - Y(NO3)3.6H2O catalyzed Four-Component Reaction for the Synthesis of Highly Functionalized Pyrano[2,3-c]pyrazoles in Aqueous Medium
Mohyeddin Safarzaei Malek Taher Maghsoodlou Ebrahim Mollashahi Mojtaba Lashkari Nourallah HazeriAn efficient one-pot four-component protocol for the synthesis of pyrano[2,3-c]pyrazolederivatives has been demonstrated using Y(NO3)3.6H2O as catalyst under mild condition. This isa general synthetic protocol which could be applicable to a wide range of carbonyl compou MoreAn efficient one-pot four-component protocol for the synthesis of pyrano[2,3-c]pyrazolederivatives has been demonstrated using Y(NO3)3.6H2O as catalyst under mild condition. This isa general synthetic protocol which could be applicable to a wide range of carbonyl compoundsincluding aromatic aldehydes, isatins and acenaphthenequinone. All The reactions proceededsmoothly, high-yielding and purity via an easy work-up procedure. Manuscript profile -
Open Access Article
4 - Synthesis, Characterization and Application of Zinc Oxide with Micro Polyhedral and Nano Plate Morphologies for Simultaneous Decolorization of Two- dye Mixture in Wastewater
Maryam MovahediIn this work, growth and assembly of the micro polyhedral zinc oxide was performed using airbubble assisted Triton X100, as a templating agent. In absence of air bubbling in the reactionsystem the nano plate zinc oxide was synthesized. The prepared samples were characte MoreIn this work, growth and assembly of the micro polyhedral zinc oxide was performed using airbubble assisted Triton X100, as a templating agent. In absence of air bubbling in the reactionsystem the nano plate zinc oxide was synthesized. The prepared samples were characterized by Xraydiffraction (XRD), field emission scanning electron microscopy (FE-SEM) and UV-Visspectrophotometer. The optical properties of the samples were evaluated by UV-Vis spectrum.Photocatalytic application of the samples for simultaneous decolorization of methylene blue (MB)and methyl orange (MO) dyes mixture in aqueous solution was examined. The Langmuir-Hinshelwood model for decolorization kinetic data was investigated. The reusability of the samplesafter five consecutive uses was examined. The photocatalytic results indicated that the micropolyhedral zinc oxide is a promising candidate for simultaneous decolorization of the MO and MBdyes (>90%). Manuscript profile -
Open Access Article
5 - Pre-concentration and Determination of Low-traces of Copper Ions in Different Mediums Using Dispersive Liquid-liquid Micro-extraction (DLLME)
Davood Kaviani Mohammad Hossein Bigtan Majid SaghiIn the paper, in order to pre-concentrate and measure the low values of Cu ions, the new, simple,quick and very sensitive method of Dispersed Liquid-Liquid Micro Extraction (DLLME) coupledwith flame Atomic Absorption spectrometry (AA) has been utilized. The DLLME techni MoreIn the paper, in order to pre-concentrate and measure the low values of Cu ions, the new, simple,quick and very sensitive method of Dispersed Liquid-Liquid Micro Extraction (DLLME) coupledwith flame Atomic Absorption spectrometry (AA) has been utilized. The DLLME techniquecoupled with AA )AA-DLLME) was run inside one narrow tube which constitute aqueous samples.In this method, a mixture of toluene and methanol 90:10 (v/v) was injected into the aqueous sampleas extractor and disperser agent and then Cu and diethyldithiocarbamate (DDTC) complex wasconcentrated inside the toluene and was collected on the sample solution. In order to optimize thefactors affecting on the process, different parameters affected on the Cu extraction such as kind andvolume of extractor, volume of dispersing solvent, pH of sample solution, ligand concentration,time for bubble formation and salt effect were studied. Under optimal condition, limit of detection(LOD), relative standard deviation (RSD) and limit of linearity (LOL) for calibration curve weremeasured and were obtained as: 1.2 μg.l-1, 3.64% and 0.01-1 mg.l-1, respectively. This method wassuccessfully applied to determine Cu in environmental waters, milk powder, liquid milk and orangejuice. Manuscript profile -
Open Access Article
6 - Synthesis and Study on Conductivity of Urethane Acrylate/Polyaniline/CuO Nanocomposites
Zeinab Hesari Behzad Shirkavand HadavandIn this research, novel conductive nanocomposites containing urethane acrylate (UA) andpolyaniline/copper (II) oxide nanocomposites (PANi-CuO) were synthesized. At firstpolyaniline/CuO nanocomposites with different amount of CuOnanoparticleswere prepared bychemical oxid MoreIn this research, novel conductive nanocomposites containing urethane acrylate (UA) andpolyaniline/copper (II) oxide nanocomposites (PANi-CuO) were synthesized. At firstpolyaniline/CuO nanocomposites with different amount of CuOnanoparticleswere prepared bychemical oxidationpolymerization of aniline using ammonium peroxydisulfate as an oxidizingagent. Afterward, UA-PANi-CuO nanocomposites were mixed and then cured by ultravioletirradiation. Analytical tests (FTIR and UV–vis spectroscopy, X-ray diffraction) approved chemicalstructure of synthesized materials. The SEM images of the nanocomposites showed uniformdistribution of CuO nanoparticles in PANi matrix and UA-PANi-CuO in urethane acrylate matrix.Electrical conductivity measurements of PANi-CuO nanocomposites revealed that the conductivityof PANi decreased with adding content of CuO nanoparticles, also the conductivity of UAincreased with adding PANi-CuO. Manuscript profile -
Open Access Article
7 - Application of 2-methylpyridinum p-toluenesulfonate ([2-MPy][p-TSA]) as an efficient catalyst for the one-pot synthesis of hexahydroquinolines-3-carboxamides
Matin Asadi Masoud Mokhtary2-Methylpyridinum p-toluenesulfonate ([2-MPy][p-TSA]) as a novel room temperature ionic liquidwas synthesized and evaluated as a recoverable catalyst for the one-pot synthesis ofhexahydroquinoline-3-carboxamide derivatives by four-component reaction of arylaldehydes,dim More2-Methylpyridinum p-toluenesulfonate ([2-MPy][p-TSA]) as a novel room temperature ionic liquidwas synthesized and evaluated as a recoverable catalyst for the one-pot synthesis ofhexahydroquinoline-3-carboxamide derivatives by four-component reaction of arylaldehydes,dimedone, acetoacetanilide and ammonium acetate in high to excellent yield in ethanol at 50 oC.The [2-MPy][p-TSA] catalyst was characterized via FT-IR, 1H NMR and 13C NMR spectroscopy.An environmentally benign procedure, four-component in one pot reaction, high yields and simplepreparation of the catalyst are some advantages of this work. Manuscript profile -
Open Access Article
8 - Simultaneous Adsorptive Stripping Differential Pulse Voltammetric Measurements of Trace Lead, Cadmium and Nickel in the Presence of 2-aminobenzoic Acid
Ebrahim Zarei Amir Izadyar Alireza Asghari Maryam RajabiIn this study, 2-aminobenzoic acid (ABA) has been used as complexing ligand for simultaneousdetermination of metal ions by adsorptive cathodic stripping voltammetry (AdCSV), for the firsttime. Thus, a selective and sensitive procedure was presented for simultaneous dete MoreIn this study, 2-aminobenzoic acid (ABA) has been used as complexing ligand for simultaneousdetermination of metal ions by adsorptive cathodic stripping voltammetry (AdCSV), for the firsttime. Thus, a selective and sensitive procedure was presented for simultaneous determination oflead, cadmium and nickel using ABA and differential pulse-adsorptive cathodic strippingvoltammetry (DP-AdCSV). The method was based on adsorptive accumulation of the complexes ofPb(II), Cd(II) and Ni(II) ions with ABA onto hanging mercury drop electrode (HMDE), followedby reduction of adsorbed species by differential pulse cathodic stripping voltammetry. The effect ofexperimental parameters such as pH, ABA concentration, accumulation time and potentialand scanrate on the electrode response was examined. Under the optimized conditions, linear calibrationcurves were established for the concentration of Pb(II), Cd(II) and Ni(II) in the ranges of 5-150, 5-120 and 5-150 ng mL-1, respectively. Detection limits of 1.78, 2.26 and 1.78 ng mL-1 were obtainedfor Pb(II), Cd(II) and Ni(II), respectively. An application of the proposed method was reported fordetermination of these elements in tap water and industrial waste water of as real samples. Manuscript profile
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