β-Cyclodextrin Decorated CdS Nanocrystals Boosting the Photocatalytic Conversion of Alcohols  

作　　者：Juan Wang You-Xiang Feng Min Zhang Chao Zhang Ming Li Sheng-Jie Li Wen Zhang Tong-Bu Lu 

机构地区：[1]Institute for New Energy Materials and Low Carbon Technologies,School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300384

出　　处：《CCS Chemistry》2020年第3期81-88,共8页中国化学会会刊（英文）

基　　金：supported financially by the National Key R&D Program of China(2017YFA0700104),NSFC(21702146,21790052,and 21931007);111 Project of China(D17003)。

摘　　要：Regarding the utilization of semiconductor nanocrystals(NCs)in photocatalysis,the significant challenge is to eliminate the hindrance of decorated surface ligands on the photocarrier transport while maintaining their overall stability.Herein,we report a novel and stable catalyst comprising CdS NCs and surfacebound mono-(6-mercapto-6-deoxy)-β-cyclodextrin(HS-β-CD)molecules(denoted as CdS-CD),which could convert alcohols selectively into diols or aldehydes and H2 under visible light irradiation,with 100%atomutilization,using an aqueous medium as a green solvent.The decoratedβ-CD ligands did not only confer a good stability of CdS-CD in water but also showed a high host–guest affinity to the alcohol species,thereby,guaranteeing a close vicinity of alcohol molecules at the surface of CdS NCs and minimizing the hindrance of surface ligands on the photocarrier transport.As a result,the CdS-CD displayed much improved photocatalytic activity for the conversion of alcohols in aqueous media,compared with those of CdS-BF_(4)NCs.

关 键 词：CdS nanocrystals Β-CYCLODEXTRIN ALCOHOL PHOTOCATALYSIS dehydrogenative cross-coupling reactions 

分 类 号：O64[理学—物理化学]