Meng Zhang, Congcong Piao, Jun Wang
College of Chemistry, Liaoning University
Di Wang, Zhaohong Zhang, Youtao Song
School of Environment,Liaoning University
Abstract
In general, the conversion of nitride organic dyes in wastewater to ammonium ions (NH4+) depends on the choice of co-catalysts. In this work, a Z-scheme (Cu,Pd)-NiGa2O4/BiVO4 photocatalyst with dual co-catalysts is prepared for photocatalytic conversion of organic dyes to NH4+. Some influence factors, deposited order, molar proportion and deposited amount of Cu and Pd, on the photocatalytic activity are considered. The effects of irradiation time, NO2− and SO32− concentrations and catalyst used times are also evaluated. The results display that the Z-scheme (Cu,Pd)-NiGa2O4/BiVO4 photocatalyst has an excellent performance in conversions of NO2− and SO32−. The generation ratio of NH4+ is 4.4-fold as much as that in the presence of Z-scheme NiGa2O4/BiVO4 photocatalyst. Also, NH4+ as a main product can be generated in the actual photocatalytic conversion of nitride organic dyes. It is wished that this work could provide a feasible route to convert organic dyes in wastewater to selectively generate NH4+ and SO4 2−, forming (NH4)2SO4 (the main ingredient of fertilizer), respectively.
Read the article here:
21-Bimetal Cu and Pd decorated Z-scheme NiGa2O4BiVO4 photocatalyst for conversion of nitride and sulfide dyes to (NH4)(2)SO4.pdf
