Efficient photo-catalytic degradation of malachite green using nickel tungstate material as photo-catalyst.

Title Efficient photo-catalytic degradation of malachite green using nickel tungstate material as photo-catalyst.
Authors N. Helaïli; A. Boudjamaa; M. Kebir; K. Bachari
Journal Environ Sci Pollut Res Int
DOI 10.1007/s11356-016-8296-3
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.

Citation N. Helaïli; A. Boudjamaa; M. Kebir; K. Bachari.Efficient photo-catalytic degradation of malachite green using nickel tungstate material as photo-catalyst.. Environ Sci Pollut Res Int. 2017;24(7):64816491. doi:10.1007/s11356-016-8296-3

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