Enhancing the photocatalytic activity of ZnSn(OH)6 achieved by gradual sulfur doping tactics. Issue 19 (30th April 2019)

• Record Type: Journal Article
• Authors: Lian, Xinyi; Chen, Zhou; Yu, Xiang; Fan, Tingting; Dong, Yunyun; Zhai, Hesheng; Fang, Weiping; Yi, Xiaodong
• Is Part Of: Nanoscale. Volume 11:Issue 19(2019)
• Page Start: 9444
• Page End: 9456
• Publication Date: 2019-04-30
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c9nr01103j
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : A gradual sulfur doping strategy was first proposed here to expand the optical absorption range, improve the separation efficiency of photogenerated electron–hole pairs, and finally enhance the photocatalytic activity. Abstract : To solve the intrinsic deficiency inherited from the large band gap of ZnSn(OH)6 (ZSH), a gradual sulfur doping strategy is first proposed here to expand the optical absorption range, improve the separation efficiency of photogenerated electron–hole pairs, and thus enhance the photocatalytic activity. It is demonstrated that the distribution of sulfur in the flower-like ZSH (the sulfur doped sample is denoted as S-ZSH) tends to be largest on the outer most surface and becomes smaller towards the interior. The S-ZSH therefore has a gradual bandgap structure that is beneficial for transferring photogenerated charge carriers from the interior to the surface, which will greatly enhance the utilization of photoelectrons. As a result, the visible light photocurrent density of S-ZSH and the photocatalytic degradation rate of rhodamine (RhB) are about 5 and 10 times higher than with pristine ZSH, respectively.