Construction of Ag2S@CaTiO3 heterostructure photocatalysts for enhanced photocatalytic degradation of dyes

doi:10.5004/dwt.2019.24747

CORC > 兰州理工大学 > 兰州理工大学 > 理学院

	Construction of Ag2S@CaTiO3 heterostructure photocatalysts for enhanced photocatalytic degradation of dyes
	Yan, Yuxiang 1; Yang, Hua 1; Yi, Zao 2; Xian, Tao 3; Li, Ruishan 1; Wang, Xiangxian 1
刊名	DESALINATION AND WATER TREATMENT
	2019-12-01
卷号	170 页码:349-360
关键词	CaTiO3 nanocuboids Ag2S quantum dots Ag2S@CaTiO3 composites Photocatalytic degradation performance Z-scheme electron transfer
ISSN号	1944-3994
DOI	10.5004/dwt.2019.24747
英文摘要	In this work, we have assembled Ag2S carbon quantum dots (CQDs) onto CaTiO3 nanocuboids (NCs), aimed at creating Ag2S@CaTiO3 composite photocatalysts with superior photocatalytic performances. Scanning/transmission electron microscopy observation confirms the uniform decoration of Ag2S CQDs (7-17 nm) on the surface of CaTiO3 NCs with size of 0.8.1.1 mu m in length and 0.3-0.5 mu m in width. Photoluminescence, photocurrent response and electrochemical impedance spectroscopy investigations reveal that the Ag2S@CaTiO3 composites manifest highly efficient separation of photoexcited electron/hole pairs. The photocatalytic degradation activity of the Ag2S@CaTiO3 composites was assessed by the removal of rhodamine B from aqueous solution. It is demonstrated that the composites exhibit photocatalytic degradation performance much superior to that of bare Ag2S CQDs and CaTiO3 NCs under ultraviolet irradiation. This can be explained as the result of efficient separation of photoexcited electron/hole pairs induced by the Z-scheme electron transfer. In addition, the composites also manifest enhanced visible-light photocatalytic performance when compared with bare CaTiO3 NCs, implying that they can make the best use of the solar energy in the practical photocatalytic applications.
WOS研究方向	Engineering ; Water Resources
语种	英语
出版者	DESALINATION PUBL
WOS记录号	WOS:000502091900034
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/155300]
专题	理学院
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China; 2.Southwest Univ Sci & Technol, Joint Lab Extreme Condit Matter Properties, Mianyang 621010, Sichuan, Peoples R China; 3.Qinghai Normal Univ, Coll Phys & Elect Informat Engn, Xining 810008, Qinghai, Peoples R China
推荐引用方式 GB/T 7714	Yan, Yuxiang,Yang, Hua,Yi, Zao,et al. Construction of Ag2S@CaTiO3 heterostructure photocatalysts for enhanced photocatalytic degradation of dyes[J]. DESALINATION AND WATER TREATMENT,2019,170:349-360.
APA	Yan, Yuxiang,Yang, Hua,Yi, Zao,Xian, Tao,Li, Ruishan,&Wang, Xiangxian.(2019).Construction of Ag2S@CaTiO3 heterostructure photocatalysts for enhanced photocatalytic degradation of dyes.DESALINATION AND WATER TREATMENT,170,349-360.
MLA	Yan, Yuxiang,et al."Construction of Ag2S@CaTiO3 heterostructure photocatalysts for enhanced photocatalytic degradation of dyes".DESALINATION AND WATER TREATMENT 170(2019):349-360.