Ordered Mesoporous Black TiO 2 as Highly Efficient Hydrogen Evolution Photocatalyst

作者：Wei Zhou, Wei Li, Jian‐Qiang Wang, Yang Qu, Ying Chun Yang, Ying Hao Xie, Kaifu Zhang, Lei Wang, Honggang Fu, Dongyuan Zhao · 发表于：Journal of the American Chemical Society · 年份：2014 · DOI：10.1021/ja504802q · 被引用次数：979 · 研究领域：Advanced Photocatalysis Techniques、TiO2 Photocatalysis and Solar Cells、Catalytic Processes in Materials Science

Mesoporous TiO2 has gained increasing interest because of its outstanding properties and promising applications in a wide range of fields. Herein, we report the facile synthesis of ordered mesoporous black TiO2 (OMBT) materials, which exhibit excellent photocatalytic hydrogen evolution performances. In this case, the employment of a thermally stable and high-surface-area mesoporous TiO2 as the hydrogenation precursor is the key for fabricating the OMBT materials, which not only facilitate H2 gas diffusion into TiO2 and interaction with their structures but also maintain the ordered mesoporous structures as well as inhibit the phase transformation (from anatase to rutile) and crystal growth during hydrogenation at 500 °C. The resultant OMBT materials possess a relatively high surface area of ∼124 m(2) g(-1) and a large pore size and pore volume of ∼9.6 nm and 0.24 cm(3) g(-1), respectively. More importantly, the OMBT materials can extend the photoresponse from ultraviolet to visible and infrared light regions and exhibit a high solar-driven hydrogen production rate (136.2 μmol h(-1)), which is almost two times as high as that of pristine mesoporous TiO2 (76.6 μmol h(-1)).