Construction of one dimensional ZnWO4@SnWO4 core-shell heterostructure for boosted photocatalytic performance. Issue 10 (October 2019)

• Record Type: Journal Article
• Authors: Zhuang, Huaqiang; Xu, Wentao; Lin, Liqin; Huang, Mianli; Xu, Miaoqiong; Chen, Shaoyun; Cai, Zhenping
• Is Part Of: Journal of materials science & technology. Volume 35:Issue 10(2019)
• Page Start: 2312
• Page End: 2318
• Publication Date: 2019-10
• Subjects: ZnWO4@SnWO4 -- Core-shell -- Heterostructure -- Photocatalyst -- Visible light; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2019.05.036
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: The one-dimensional ZnWO4 @SnWO4 photocatalyst with a core-shell heterostructure was successfully constructed by a simple two-step method. It is interesting to note that ZnWO4 @SnWO4 composite photocatalyst owns a higher photocatalytic activity for RhB degradation under visible light irradiation. The introduction of SnWO4 shell layer, which forms a clear heterogenous interface between ZnWO4 and SnWO4, increases the photo-absorption efficiency of ZnWO4 nanorods. In addition, its band-edge absorption evidently shifts toward the visible region. Based on the photoelectrochemical (PEC) and electron spin resonance (ESR) measurements, it is found that the photocatalytic activity was attributed to the efficient separation and transfer of photo-generated charge carriers. Hence, they can produced more hydroxyl radical ( OH) as the main active species in the photocatalytic reaction process.