Preparation of CdS Nanoparticles-TiO2 Nanorod Hererojunction and Their High-Performance Photocatalytic Activity

Catalysts

Yu Xie¹  Shenli Rao¹  Jinbing Zhang¹  Jianhua Song¹  Dedong Zeng¹  Fayun Zhang¹  Fahui Wang¹  Jinsheng Zhao²  Lei Wang³ 

[1] School of New Energy Science and Engineering, Xinyu University, Xinyu 338004, China;Shandong Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252059, China;State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;

关键词: TiO₂ nanorods;    CdS nanoparticles;    hydrothermal method;    methyl orange;    photocatalysis;   

DOI  :  10.3390/catal10040441

来源: DOAJ

【 摘 要 】

As a new and emerging technology, photocatalytic oxidation is widely used in the fields of sewage treatment and organic pollution control. In this study, CdS nanoparticles were prepared at room temperature by an innovative preparation method, then TiO₂ nanorod–CdS nanoparticle heterojunction photocatalysts were prepared using the solvothermal method, with TiCl₃ used as the precursor for TiO₂ nanorods. This study mainly took advantage of the small size of the CdS nanoparticles in combination with TiO₂ nanorods, and the resultant heterojunctions had large specific surface areas, thereby increasing the contact area between the catalysts and the contaminants. In addition, due to the lower band gap energy (2.4 eV) of CdS, the photo response range of the heterojunction photocatalysts was also increased. In an experimental study, through photocatalytic performance tests of the catalysts with different weight ratios, it was found that the TiO₂(40%)@CdS composite had the best photocatalytic performance and the highest catalytic rate. BET, SEM, and other tests showed that the specific surface area of the TiO₂(40%)@CdS composite was the largest. TiO₂ nanorods and CdS particles were uniformly distributed in the composite, and the optical response range was extended to the visible light region.

【 授权许可】

Unknown