title: Efficient photo-catalytic degradation of malachite green using nickel tungstate material as photo-catalyst.
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 m2/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.
authors.affiliation: Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques, BP 384, Siège ex-Pasna Zone Industrielle, Bou-Ismail, CP 42004, Tipaza, Algeria.|Laboratory of Storage and Valorization of Renewable Energies, Faculty of Chemistry, USTHB, BP 32, 16111 El-Alia, Algiers, Algeria.
authors.forename: N
authors.initials: N
authors.lastname: Helaïli
authors.affiliation: Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques, BP 384, Siège ex-Pasna Zone Industrielle, Bou-Ismail, CP 42004, Tipaza, Algeria. amel_boudjemaa@yahoo.fr.
authors.forename: A
authors.initials: A
authors.lastname: Boudjamaa
authors.affiliation: Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques, BP 384, Siège ex-Pasna Zone Industrielle, Bou-Ismail, CP 42004, Tipaza, Algeria.
authors.forename: M
authors.initials: M
authors.lastname: Kebir
authors.affiliation: Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques, BP 384, Siège ex-Pasna Zone Industrielle, Bou-Ismail, CP 42004, Tipaza, Algeria.
authors.forename: K
authors.initials: K
authors.lastname: Bachari
mesh_terms: D000327:Adsorption; D002384:Catalysis; D004396:Coloring Agents / Q000032:analysis* / Q000737:chemistry / Q000528:radiation effects; D052918:Environmental Restoration and Remediation; D008027:Light; D008855:Microscopy, Electron, Scanning; D009532:Nickel / Q000737:chemistry*; D010316:Particle Size; D012394:Rosaniline Dyes / Q000032:analysis* / Q000737:chemistry / Q000528:radiation effects; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D017973:Tungsten Compounds / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry / Q000528:radiation effects; D014961:X-Ray Diffraction
chemical_list: D004396:Coloring Agents; D012394:Rosaniline Dyes; D017973:Tungsten Compounds; D014874:Water Pollutants, Chemical; C005095:malachite green; D009532:Nickel
keywords: Malachite green; Nickel tungsten; Photo–degradation; Photo–electrochemical properties; Visible light