Titanium dioxide and cadmium sulfide co-sensitized graphitic carbon nitride nanosheets composite photocatalysts with superior performance in phenol degradation under visible-light irradiation

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• 作者：Jinhua Yao ; Huan Chen ; ^{hchen404@njust.edu.cn} ; Fang Jiang ; ^{fjiang@njust.edu.cn} ; Zhongyi Jiao ; Mingchang Jin
• 关键词：TiO2-CdS-gCNNSs heterojunction photocatalysts ; Visible light photocatalysis ; Phenol degradation
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：15 March 2017
• 年：2017
• 卷：490
• 期：Complete
• 页码：154-162
• 全文大小：2550 K
• 卷排序：490

文摘

In this work, TiO2-CdS-gCNNSs heterojunction photocatalysts were successfully synthesized. CdS was deposited on the surface of gCNNSs via electrostatic attraction; TiOC, TiOCO and TiON bonds were produced in TiO2-CdS-gCNNSs, strengthening the interaction between TiO2 and gCNNSs. The TiO2-CdS-gCNNSs photocatalyst showed excellent photocatalytic activity for phenol degradation under visible-light irradiation, which was higher than that of CdS-gCNNSs, CdS-TiO2 and TiO2-gCNNSs. The improved photocatalytic performance of TiO2-CdS-gCNNSs was ascribed to more adsorption sites, enhanced light harvesting ability and effective separation rate of electron-hole pairs. Furthermore, the results of photocatalytic mechanism indicated that h+ and O2− played a more significant role on the phenol degradation.