Construction of Heterostructured g-C3N4/Ag/TiO2 Microspheres with Enhanced Photocatalysis Performance under Visible-Light Irradiation

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• 作者：Yanfeng Chen ; Weixin Huang ; Donglin He ; Yue Situ ; Hong Huang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2014
• 出版时间：August 27, 2014
• 年：2014
• 卷：6
• 期：16
• 页码：14405-14414
• 全文大小：652K
• ISSN：1944-8252

文摘

The visible-light photocatalytic performance of the heterostructured g-C₃N₄/Ag/TiO₂ microspheres was investigated. As an electron-conduction bridge, Ag nanoparticles were photodeposited as the interlayer between g-C₃N₄ and the surface of TiO₂ microspheres to increase visible-light absorption via the surface plasmon resonance. The interface between Ag/TiO₂ and g-C₃N₄ facilitates the direct migration of photoinduced electrons from g-C₃N₄ to Ag/TiO₂, which is conductive to retarding the recombination of electron鈥揾oles. The g-C₃N₄ (4%)/Ag/TiO₂ microsphere sample shows significant photocatalytic activity, higher than the sum of g-C₃N₄ (1.2 mg) and Ag/TiO₂ samples, or the sum of TiO₂ and Ag/g-C₃N₄ (1.8 mg) samples. It indicates that the heterostructured combination of g-C₃N₄, Ag and TiO₂ microspheres provides synergistic photocatalytic activity through an efficient electron transfer process.

Keywords:

heterostructured; g-C₃N₄; Ag; TiO₂ microspheres; photocatalysis; visible-light