Solar Energy Group, Department of Chemical Engineering, University College London , Torrington Place, London, WC1E 7JE, United Kingdom.
J Am Chem Soc. 2014 Sep 10;136(36):12568-71. doi: 10.1021/ja506386e. Epub 2014 Aug 26.
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 μmol h(-1) g(-1) 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.
首次证明，坚固的有机半导体 g-C3N4 可以被整合到一个受自然启发的水分解系统中，类似于自然光合作用中的 PSII 和 PSI。为了在可见光下进行整体水分解，开发了两种涉及两种不同金属氧化物（BiVO4 和 WO3）的石墨相氮化碳的平行系统。因此，可以以理想的 2:1 比例产生氢气和氧气，并且已经发现这两个系统中的演化速率都取决于 pH 值、氧化还原介质浓度以及两种光催化剂之间的质量比，从而导致在 14 小时内从水中以 36 和 18 μmol h(-1) g(-1) 的稳定且可重复的 H2 和 O2 演化率。我们的研究结果表明，g-C3N4 可以作为一种多功能坚固的光催化剂，也可以用于其他系统，如 PEC 电池或耦合太阳能电池系统。
