Visible Light-Driven Pure Water Splitting by a Nature-Inspired Organic Semiconductor-Based System

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• 作者：David James Martin ; Philip James Thomas Reardon ; Savio J. A. Moniz ; Junwang Tang
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：September 10, 2014
• 年：2014
• 卷：136
• 期：36
• 页码：12568-12571
• 全文大小：245K
• ISSN：1520-5126

文摘

For the first time, it is demonstrated that the robust organic semiconductor g-C₃N₄ can be integrated into a nature-inspired water splitting system, analogous to PSII and PSI in natural photosynthesis. Two parallel systems have been developed for overall water splitting under visible light involving graphitic carbon nitride with two different metal oxides, BiVO₄ and WO₃. Consequently, both hydrogen and oxygen can be evolved in an ideal ratio of 2:1, and evolution rates in both systems have been found to be dependent on pH, redox mediator concentration, and mass ratio between the two photocatalysts, leading to a stable and reproducible H₂ and O₂ evolution rate at 36 and 18 渭mol h^鈥? g^鈥? from water over 14 h. Our findings demonstrate g-C₃N₄ can serve as a multifunctional robust photocatalyst, which could also be used in other systems such as PEC cells or coupled solar cell systems.