Bai Jiaxin, Lu Baichuan, Han Qing, Li Quansong, Qu Liangti
Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Cluster Science, Ministry of Education of China, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing 100081 , P. R. China.
ACS Appl Mater Interfaces. 2018 Nov 7;10(44):38066-38072. doi: 10.1021/acsami.8b13371. Epub 2018 Oct 24.
Development of a simple and stable photocatalyst for overall water splitting is a promising avenue for solar energy conversion. Here, carbon nitride (CN) nanosheet panels decorated with in situ-formed (111) facets-oriented Au nanoparticles (AuNPs) have been prepared by vapor-deposition polymerization followed by an easy immersion technique. Benefiting from the enhanced visible light absorption, the surface plasmon resonance effect of AuNPs, rapid transportation and separation of charge carriers, as well as better-aligned valence band levels, the as-obtained photocatalyst shows effective overall water splitting with stoichiometric H and O evolution even without any sacrificial agent, distinct from the half-reaction of Pt-decorated CN. This work opens up a brand-new route for facet self-selective growth of metal on two-dimensional conjugated carbon nitride materials, which has been demonstrated to be effective for artificial photosynthesis applications.
开发一种用于全分解水的简单且稳定的光催化剂是太阳能转换的一个有前景的途径。在此，通过气相沉积聚合随后采用简便的浸渍技术制备了用原位形成的（111）面取向的金纳米颗粒（AuNPs）修饰的氮化碳（CN）纳米片面板。得益于增强的可见光吸收、AuNPs的表面等离子体共振效应、电荷载流子的快速传输和分离以及更好对齐的价带能级，所制备的光催化剂即使在没有任何牺牲剂的情况下也能实现有效的全分解水并按化学计量比产生氢气和氧气，这与Pt修饰的CN的半反应不同。这项工作为金属在二维共轭氮化碳材料上的晶面自选择性生长开辟了一条全新的途径，已证明其在人工光合作用应用中是有效的。
