Synthesis of New Hollow Nanocomposite Photocatalysts: Sunlight Applications for Removal of Gaseous Organic Pollutants

Synthesis of novel sunlight-driven hollow nano-composite photocatalysts has been considered as a future innovation technology to address air pollution remediation. The present work deals with the primary Pt-doped/TiO2 hollow nano-sized photocatalysts using carbon colloidal spheres as a sacrificial hard template. Then Cu2+ and Cd2+ as a co-doping operator were introduced, which balanced out the empty structure at higher temperature and controlled the Pt oxidation process. Here, the generation of sulfuric hollow of CuS/ Pt-TiO2 and CuS-CdS/Pt-TiO2 via thermal treatment with H-2 5 at 180 degrees C for 12h was performed as a new technique. The morphological structure of novel photocatalysts was characterized and their ability to decompose the isopropanol gas under solar irradiation was investigated; which is about 20 times higher than that of the conventional catalyst TiO2-P25. This presents for the first time one of the best TiO2 based photonanocatalysts under solar or visible light for promising environmental and industrial applications. (C) 2020 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.