Enhanced near-infrared photocatalysis of NaYF4:Yb, Tm/CdS/TiO2 composites

	Enhanced near-infrared photocatalysis of NaYF4:Yb, Tm/CdS/TiO2 composites
	Guo X. Y.; Di W. H.; Chen C. F.; Liu C. X.; Wang X.; Qin W. P.
	2014
发表期刊	Dalton Transactions
ISSN	ISBN/1477-9226
卷号	43 期号:3 页码:1048-1054
摘要	The previous works by our group (Chem. Commun., 2010, 46, 2304-2306; ACS Catal., 2013, 3, 405-412; Phys. Chem. Chem. Phys., 2013, 15, 14681-14688) have reported the near-infrared-driven photocatalysis of broadband semiconductor TiO2 or ZnO that was combined with upconverting luminescence particles to form a core-shell structure. However, the photocatalytic efficiency is low for this new type of photocatalysts. In this work, NaYF4:Yb, Tm/CdS/TiO2 composites for NIR photocatalysis were prepared by linking CdS and TiO2 nanocrystals on the NaYF4:Yb, Tm microcrystal surfaces. CdS and TiO2 were well interacted to form a heterojunction structure. The energy transfer between NaYF4:Yb, Tm and the semiconductors CdS and TiO2 was investigated by steady-state and dynamic fluorescence spectroscopy. The photocatalytic activities of the as-prepared composites were evaluated by the degradation of methylene blue in aqueous solution upon NIR irradiation. Significantly, it was found that the united adhesions of CdS and TiO2 on the NaYF4:Yb, Tm particle surfaces showed much higher catalytic activities than the individual adhesion of CdS or TiO2 on the NaYF4:Yb, Tm surfaces. This was attributed mainly to the effective separation of the photogenerated electron-hole pairs due to the charge transfer across the CdS-TiO2 interface driven by the band potential difference between them. The presented composite structure of upconverting luminescence materials coupled with narrow/wide semiconductor heterojunctions provides a new model for improved NIR photocatalysis.
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/43959
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Guo X. Y.,Di W. H.,Chen C. F.,et al. Enhanced near-infrared photocatalysis of NaYF4:Yb, Tm/CdS/TiO2 composites[J]. Dalton Transactions,2014,43(3):1048-1054.
APA	Guo X. Y.,Di W. H.,Chen C. F.,Liu C. X.,Wang X.,&Qin W. P..(2014).Enhanced near-infrared photocatalysis of NaYF4:Yb, Tm/CdS/TiO2 composites.Dalton Transactions,43(3),1048-1054.
MLA	Guo X. Y.,et al."Enhanced near-infrared photocatalysis of NaYF4:Yb, Tm/CdS/TiO2 composites".Dalton Transactions 43.3(2014):1048-1054.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Guo-2014-Enhanced ne（2910KB）			开放获取	CC BY-ND	浏览下载