Synthesis and characterization of nickel oxide and evaluation of its catalytic activities for degradation of methyl orange in aqueous medium

Abstract

This study focuses on synthesis of nickel oxide catalyst and exploration of its catalytic activities for degradation of methyl orange in aqueous medium. Nickel oxide was prepared sole-gel method using nickel nitrate haxahydrate and citric acid as precursor materials. X-ray diffractometry and scanning electron microscopy were used for characterization of prepared nickel oxide particles. The prepared particles were used as the catalysts for the degradation of Methyl Orange in aqueous medium. The effects of different parameters on degradation of methyl orange were investigated. The degradation of methyl orange followed the Eley-Rideal (E-R) mechanism. The apparent activation energies for degradation of methyl orange determined was found as 36.4 kJ/mol.

Synthesis and characterization of Bi2O3 and Ag-Bi2O3 and evaluation of their photocatalytic activities towards photodegradation of crystal violet dye

“…Several conventional methods are available for the treatment of wastewater; however, the conventional methods are not effective in the complete removal of the dyes from the environment. Adsorption is one of the most commonly used and simple conventional methods, but it transforms the phase of the pollutants only [7][8][9][10][11][12][13][14][15]. Semiconductor-based photocatalysis is an excellent option for the eradication of organic pollutants and dyes from industrial effluents.…”