Publication Date:
2018
Description:
〈p〉Publication date: 5 January 2019〈/p〉
〈p〉〈b〉Source:〈/b〉 Colloids and Surfaces A: Physicochemical and Engineering Aspects, Volume 560〈/p〉
〈p〉Author(s): Jie Zeng, Zili Li, Hao Peng, Xiaogang Zheng〈/p〉
〈h5〉Abstract〈/h5〉
〈div〉〈p〉ZnO-coated Sm〈sub〉2〈/sub〉O〈sub〉3〈/sub〉 (Sm〈sub〉2〈/sub〉O〈sub〉3〈/sub〉@ZnO) nano-heterostructure was prepared for the visible light driven photodegradation of RhB. Core-shell Sm〈sub〉2〈/sub〉O〈sub〉3〈/sub〉@ZnO composites exhibited the enhanced photocatalytic activity compared with pure Sm〈sub〉2〈/sub〉O〈sub〉3〈/sub〉 and ZnO nanoparticles alone for RhB removal. Sm〈sub〉2〈/sub〉O〈sub〉3〈/sub〉@ZnO with the ZnO thickness of around 10 nm presented the best photocatalytic capacity and slightly deactivated after five cycle times. It’s attributed to the extended light-harvesting capability of the core-shell heterostructure toward visible light region and the tunneled valence band holes of Sm〈sub〉2〈/sub〉O〈sub〉3〈/sub〉 at the interface between Sm〈sub〉2〈/sub〉O〈sub〉3〈/sub〉 core and ZnO shell. The attenuated photocatalytic activity of Sm〈sub〉2〈/sub〉O〈sub〉3〈/sub〉@ZnO in subsequent reuse process was ascribed to the change of chemical surface composition of Sm〈sub〉2〈/sub〉O〈sub〉3〈/sub〉 under visible light irradiation. ESR results indicated that 〈sup〉〈img src="https://sdfestaticassets-eu-west-1.sciencedirectassets.com/shared-assets/16/entities/rad"〉〈/sup〉O〈sub〉2〈/sub〉〈sup〉−〈/sup〉 radical was main responsible for the photocatalytic performance of Sm〈sub〉2〈/sub〉O〈sub〉3〈/sub〉@ZnO.〈/p〉〈/div〉
〈h5〉Graphical abstract〈/h5〉
〈div〉〈p〉〈figure〉〈img src="https://ars.els-cdn.com/content/image/1-s2.0-S0927775718307647-ga1.jpg" width="500" alt="Graphical abstract for this article" title=""〉〈/figure〉〈/p〉〈/div〉
Print ISSN:
0927-7757
Electronic ISSN:
1873-4359
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
