Xie He, Hou Chengyi, Wang Hongzhi, Zhang Qinghong, Li Yaogang
State Key Laboratory of Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, People's Republic of China.
Engineering Research Center of Advanced Glasses Manufacturing Technology, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, People's Republic of China.
Nanoscale Res Lett. 2017 Dec;12(1):400. doi: 10.1186/s11671-017-2101-1. Epub 2017 Jun 12.
S, N co-doped graphene quantum dots (S,N-GQDs) coupled with P25 (TiO) (S,N-GQD/P25) have been prepared via simply hydrothermal method. The as-prepared S,N-GQD/P25 composites exhibited excellent photocatalytic hydrogen generation activities, with a significantly extended light absorption range and superior durability without loading any noble metal cocatalyst. The photocatalytic activity of this composite under visible light (λ = 400-800 nm) was greatly improved compared with that of pure P25. This remarkable improvement in photocatalytic activity of the S,N-GQD/P25 composites can be attributed to that S,N-GQDs play a key role to enhance visible light absorption and facilitate the separation and transfer of photogenerated electrons and holes. Generally, this work could provide new insights into the facile fabrication of photocatalytic composites as high performance photocatalysts.
通过简单的水热法制备了硫、氮共掺杂的石墨烯量子点（S，N-GQDs）与P25（TiO₂）耦合的材料（S，N-GQD/P25）。所制备的S，N-GQD/P25复合材料表现出优异的光催化产氢活性，具有显著拓宽的光吸收范围和优异的耐久性，且无需负载任何贵金属助催化剂。与纯P25相比，该复合材料在可见光（λ = 400 - 800 nm）下的光催化活性有了极大提高。S，N-GQD/P25复合材料光催化活性的显著提高可归因于S，N-GQDs在增强可见光吸收以及促进光生电子和空穴的分离与转移方面发挥了关键作用。总体而言，这项工作可为高性能光催化剂的光催化复合材料的简便制备提供新的见解。
