Maryam Movahedi
Payame Noor University
[ 1 ] - The zinc chromium ferrite magnetic nanoparticles ZnCrFeO4: An efficient catalyst for acetylation of alcohols, phenols and amines under solvent-free conditions
In this study, the zinc chromium ferrite magnetic nanoparticles ZnCrFeO4 are synthesized via sol-gel method and characterized by X-ray diffraction (XRD) analysis, Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The XRD analysis showed that ZnCrFeO4 has single-phase cubic structure. The synthesized ZnCrFeO4 has been used as an efficient catalyst for acetyl...
[ 2 ] - MgCaFe-layered double hydroxide (LDH) for congo red dye removal in aqueous solution
In this work, the ability of the MgCaFe- Layered double hydroxide (LDH) for congo red (CR) dye removal in aqueous solution was investigated. Various parameters such as initial dye concentrations, temperature, adsorbent dosage, pH effect and agitation rate were examined and optimal conditions (10 mgL-1 of the dye concentration, 25 °C of temperature, 0.5 gL-1 of the adsorbent dosage, pH~7 and 450...
[ 3 ] - Synthesis of ZnO/Bi2O3 and SnO2/Bi2O3/Bi2O4 mixed oxides and their photocatalytic activity
In the present work, ZnO/Bi2O3, SnO2/Bi2O3/Bi2O4 mixed oxide, Bi2O3 rod-like and SnO2 nanoparticle have been synthesized. The obtained samples were characterized by field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD). The optical properties of samples were evaluated by UV-Vis spectrophotometer. The photocatalytic activity of samples was evaluated by decolorization o...
[ 4 ] - ZnFe2O4 nanoparticle: Synthesis and photocatalytic activity under UV-vis and visible light
In the present work, the ZnFe2O4 nanoparticle has been successfully synthesized. The obtained sample was characterized by X-ray diffraction (XRD), emission scanning electron microscopy (FE-SEM) and its optical property was examined by UV-Vis spectrophotometer. FE-SEM revealed that the particle size of the ZnFe2O4 of about 47 nm was synthesized. The photocatalytic performance under UV-Vis and vi...
[ 5 ] - A Kinetic Study on Adsorption of Congo Red from Aqueous Solution by ZnO-ZnFe2O4-polypyrrole Magnetic Nanocomposite
In this work, magnetically separable ZnO-ZnFe2O4-PPy nanocomposite as an efficient adsorbent was synthesized by two steps. At first, zinc oxide (ZnO) and ZnFe2O4 nanoparticles were synthesized using simple and facile precipitation method. Then, ZnO-ZnFe2O4 mixed oxide was modified by polypyrrole (PPy). The adsorbent was character...
[ 6 ] - Synthesis, Characterization and Application of Zinc Oxide with Micro Polyhedral and Nano Plate Morphologies for Simultaneous Decolorization of Two- dye Mixture in Wastewater
In 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-Visspectrop...
[ 7 ] - تهیه‌ی ZnO/ZnAl2O4 آلائیده با یون مس (II) به عنوان جاذب کارآمد برای حذف رنگ آنیونی از محلول آبی
در این پژوهش ZnO/ZnAl2O4 آلائیده با یون مس(II) تهیه شد. نمونه توسط روش‌های دستگاهی پراش اشعه ایکس (XRD)، طیف سنج مادون قرمز تبدیل فوریه(FT-IR)، میکروسکوپ الکترونی روبشی (SEM) مجهز به اسپکتروسکوپی پراکندگی انرژی اشعه‌ی ایکس (EDX) و اسپکتروسکوپی نشری پلاسمای جفت شده القائی (ICP) شناسائی شد. کارائی نمونه به عنوان جاذب برای حذف رنگ‌های آنیونی و کاتیونی متیل اورنژ، کنگورد، متیلن بلو و مخلوط رنگ‌ها...