Defective Titanium Dioxide-supported Ultrasmall Au Clusters for Photocatalytic Hydrogen Production

Frontiers in Physics

Mingliang Jin¹  Xiaoqin Zhang²  Wenna Zhang²  Yuanmei Xu³ 

[1] International Academy of Optoelectronics at Zhaoqing, South China Normal University, Guangdong, China;National Center for International Research on Green Optoelectronics, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, China;State Key Lab of Silicon Materials, Zhejiang University, Hangzhou, China;

关键词: Au;    cluster;    defect TiO2;    H2 evolution;    photocatalytic;   

DOI  :  10.3389/fphy.2020.616349

来源: DOAJ

【 摘 要 】

Ultrasmall precious metal clusters have attracted extensive attention for providing a very specific surface and promoting electron transfer. In this work, ultrasmall Au clusters based on defective TiO2 nanosheets (Au/D-TiO2) were prepared and introduced into photocatalytic hydrogen evolution. Different defects of TiO2 nanosheets (D-TiO2) were constructed using a heating process and then loaded with Au clusters. Compared with bare TiO2, Au clusters established on defective TiO2 nanosheets with a narrower band gap showed higher light absorption performances, resulting in obviously enhanced photocatalytic hydrogen production performances. The Au/D-TiO2 displayed the greatly enhanced photocatalytic hydrogen evolution activity of 3,142.33 μmol h−1 g−1, which was over 45 times than the pure TiO2. The results showed that the catalysts had good prospects in the field of photocatalytic hydrogen production.

【 授权许可】

Unknown