Highly enhanced photocatalytic activity of CaSn(OH)6 through tuning CaSn(OH)6/SnO2 heterostructural interaction and optimizing Fe3+ doping concentration

作者：Liu, Tongyao; Ma, Xinlong; Yang, Linfen; Li, Hao; Li, Huihui; Lee, Soo Wohn; Wang, Yuhua^*

来源：Applied Catalysis B: Environmental , 2017, 217: 256-264.

DOI：10.1016/j.apcatb.2017.05.080

• Photocatalysis
• UV-vis light
• Heterostructures
• Fe3+ ions doping

A series of novel CaSn(OH)(6)/SnO2 heterostructure (CSH) photocatalysts have been synthesized via a facile one-pot hydrothermal process with different molar ratios of raw materials. The obtained CaSn(OH)(6)/SnO2 composite with CaCl2:SnCl4 = 0.8 (0.8CSH) exhibits outstanding ultraviolet (UV)-light photocatalytic activity, which could be attributed to the efficient separation of photogenerated electrons and holes. Meanwhile, the doping of Fe3+ ions into 0.8CSH substrate greatly enhances the UV and visible-light photocatalytic activities, and the photodegradation rate of 1.0 mol% Fe-doped CSH (1.0FCSH) sample exceeds that of 0.8CSH by a factor of more than 14 times. This could be attributed to the fact that Fe-doping induces the shift of the absorption edge into the visible light region and reduces the recombination of electron-hole pairs. Overall, this research can provide an effective approach to synthesize new efficient photocatalysts and facilitate their application in environmental protection.

• 出版日期2017-11-15
• 单位兰州大学