Efficient photo-catalytic degradation of malachite green using nickel tungstate material as photo-catalyst.
Identifieur interne : 000004 ( Main/Exploration ); précédent : 000003; suivant : 000005Efficient photo-catalytic degradation of malachite green using nickel tungstate material as photo-catalyst.
Auteurs : N. Helaïli [Algérie] ; A. Boudjamaa [Algérie] ; M. Kebir [Algérie] ; K. Bachari [Algérie]Source :
- Environmental science and pollution research international [ 1614-7499 ] ; 2017.
Abstract
The present study focused on the evaluation of photo-catalytic and photo-electrochemical properties of the photo-catalyst based on nickel tungstate material prepared by a nitrate method through the degradation of malachite green (MG) dye's. The effect of catalyst loading and dye concentration was examined. Physico-chemical, optical, electrical, electrochemical, and photo-electrochemical properties of the prepared material were analyzed by X-ray diffraction (XRD), fourier transform-infrared spectroscopy (FTIR), BET analysis, optical reflectance diffuse (DR), scanning electron microscopy (SEM/EDX), electrical conductivity, cyclic voltammetry (CV), current intensity, mott-shottky, and nyquist. XRD revealed the formation of monoclinic structure with a small particle size. BET surface area of the sample was around 10 m(2)/g. The results show that the degradation of MG was more than 80%, achieved after 3 h of irradiation at pH 4.6 and with a catalyst loading of 75 mg. Also, it was found that the dye photo-degradation obeyed the pseudo-first order kinetic via Langmuir Hinshelwood model.
DOI: 10.1007/s11356-016-8296-3
PubMed: 28074364
Affiliations:
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Helaïli</name><affiliation wicri:level="1"><nlm:affiliation>Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques, BP 384, Siège ex-Pasna Zone Industrielle, Bou-Ismail, CP 42004, Tipaza, Algeria.</nlm:affiliation><country xml:lang="fr">Algérie</country><wicri:regionArea>Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques, BP 384, Siège ex-Pasna Zone Industrielle, Bou-Ismail, CP 42004, Tipaza</wicri:regionArea><wicri:noRegion>Tipaza</wicri:noRegion></affiliation></author><author><name sortKey="Boudjamaa, A" sort="Boudjamaa, A" uniqKey="Boudjamaa A" first="A" last="Boudjamaa">A. 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The effect of catalyst loading and dye concentration was examined. Physico-chemical, optical, electrical, electrochemical, and photo-electrochemical properties of the prepared material were analyzed by X-ray diffraction (XRD), fourier transform-infrared spectroscopy (FTIR), BET analysis, optical reflectance diffuse (DR), scanning electron microscopy (SEM/EDX), electrical conductivity, cyclic voltammetry (CV), current intensity, mott-shottky, and nyquist. XRD revealed the formation of monoclinic structure with a small particle size. BET surface area of the sample was around 10 m(2)/g. The results show that the degradation of MG was more than 80%, achieved after 3 h of irradiation at pH 4.6 and with a catalyst loading of 75 mg. 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