Guowei Wang, Yingying Huang, Hongbo Zhang, Jun Wang

College of Chemistry, Liaoning University

Guanshu Li, Yidi Wang, Bowen Li，Youtao Song

College of Environment, Liaoning University

Abstract

A novel nanocomposite, Au/NiGa₂O₄-Au-Bi₂O₃, as an effective sonocatalyst was prepared through hydrothermal process and high-temperature calcination methods, and then characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The sonocatalytic activity of Au/NiGa₂O₄-Au-Bi₂O₃, nanocomposite was detected through the degradation of some organic pollutants under ultrasonic irradiation. Furthermore, the influences of mass ratio of NiGa₂O₄ and Bi₂O₃, ultrasonic irradiation time and used times on the sonocatalytic degradation efficiency were investigated by using Total Organic Carbon (TOC) and UV-vis spectroscopy. The experimental results showed that, because of the existence of Au nanoparticles (AuNPs) served as both conductive passageway and co-catalyst, the nanocomposite sonocatalyst (Au/NiGa₂O₄-Au-Bi₂O₃) displayed an excellent sonocatalytic activity in degradation of some organic pollutants under ultrasonic irradiation.

Read the full article here:     95-Preparation of a novel sonocatalyst, 10AuNiGa2O4-Au-Bi2O3 nanocomposite, and application in sonocatalytic degradation of organic pollutants.pdf