Hierarchical microspheres: in situ assembly of CdS quantum dots on Cd2SnO4 nanosheets with enhanced visible light photocatalytic properties. Issue 102 (12th October 2015)

• Record Type: Journal Article
• Authors: Zhang, Guimin; Fu, Zhengyi; Wang, Yucheng; Wang, Hao; Xie, Zheng
• Is Part Of: RSC advances. Volume 5:Issue 102(2015)
• Page Start: 83922
• Page End: 83930
• Publication Date: 2015-10-12
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra17679d
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Hierarchical CdS/Cd2 SnO4 microspheres with enhanced photocatalytic activity were successfully synthesized by one step solvothermal route. Abstract : A CdS/Cd2 SnO4 composite was successfully synthesized via a one step solvothermal route synergistically assisted byl -cysteine and diethanolamine. The composite is composed of CdS quantum dots stuffed in hierarchical Cd2 SnO4 microspheres with a diameter of around 2 μm, which are assembled from nanosheets with a thickness of 20–50 nm. The band gap of the composite is 2.46 eV, which is higher than pure phase CdS and Cd2 SnO4, due to the quantum size effect from CdS QDs. One possible formation mechanism of the composite is presented; the initial precipitation of Sn(OH)2 serves as a template, and the complexes ofl -cysteine coordinated with metal ion provide structural direction for the hierarchical microspheres. The CdS/Cd2 SnO4 composite showed superior adsorption ability and enhanced visible light photocatalytic activity in the degradation of RhB to CdS, Cd2 SnO4, and Degussa P-25, due to its microstructure and the efficient charge separation at the interface of CdS and Cd2 SnO4 .