Highly Efficient Visible-Light-Induced Photoactivity of Z-Scheme g-C3N4/Ag/MoS2 Ternary Photocatalysts for Organic Pollutant Degradation and Production of Hydrogen

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• 作者：Dingze Lu ; Hongmei Wang ; Xiaona Zhao ; Kiran Kumar Kondamareddy ; Junqian Ding ; Chunhe Li ; Pengfei Fang
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2017
• 出版时间：February 6, 2017
• 年：2017
• 卷：5
• 期：2
• 页码：1436-1445
• 全文大小：845K
• ISSN：2168-0485

文摘

A Z-scheme g-C₃N₄/Ag/MoS₂ ternary plasmonic photocatalyst in a flowerlike architecture of diameter about 0.4–0.6 μm is successfully synthesized by a reliable and effective method. The as-synthesized g-C₃N₄/Ag/MoS₂ photocatalyst showed excellent improvement for visible-light absorption and separation efficiency of photoinduced electron–hole pairs. The g-C₃N₄/Ag/MoS₂ system exhibits optimum visible-light-induced photocatalytic activity in degrading Rhodamin B (RhB), which is 9.43-fold and 3.56-fold of Ag/MoS₂ and g-C₃N₄/MoS₂ systems, and 8.78-fold and 2.08-fold in the production of hydrogen (H₂) out of water, respectively. The excellent photocatalytic activities are attributed to the synergetic effects of Ag, g-C₃N₄, and MoS₂ nanophase structures in the g-C₃N₄/Ag/MoS₂ composites, which result in a Z-scheme-mechanism-assisted fast separation and slow recombination of photoinduced electron–hole pairs and thereby higher photocatalytic activity.