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Enhanced Visible-Light-Driven Photocatalytic performances using Bi 2 WO 6 / MS ( M = Cd , Zn ) heterostructures : Facile synthesis and their photocatalytic mechanisms
| Content Provider | Semantic Scholar |
|---|---|
| Author | Tang, Rongfeng Duan, Shengxia Sun, Yuanwei Zhang, Xianxi Zeng, Suyuan Sun, Dezhi |
| Copyright Year | 2014 |
| Abstract | The formation of type II heterostructure is proved to be an effective method to improve the photocatalytic performance of semiconductors. In this report, a surface functionalization method using 3-mercaptopropionic (MPA) as the surface functionalizing agent was adopted for the fabrication of Bi2WO6/MS (M=Cd and Zn) heterostructures. The composition and microstructures of the as-prepared heterostructures were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM) and X-ray photoelectron spectroscopy (XPS). The as-prepared Bi2WO6/CdS and Bi2WO6/ZnS heterostructures exhibit enhanced photocatalytic activities for the degradation of Rhodamine B (Rh B) as compared to pure Bi2WO6, CdS, ZnS nanoparticles and Degussa P25. The enhanced photocatalytic activities of the as-prepared heterostructures may relate to the effective electron-hole separation during the photocatalytic process. A series of scavenger (Benzoquinone for O2, ammonium oxalate for h, AgNO3 for e, and t-BuOH for •OH) were employed to investigate the possible mechanism of the photocatalytic process. The result clearly indicate that the photogenerated holes are the main active species during the photocatalytic process. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c5/ra/c5ra04655f/c5ra04655f1.pdf |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/getauthorversionpdf/C5RA04655F |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
