Ordered Mesoporous Black TiO2 as Highly Efficient Hydrogen Evolution Photocatalyst

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• 作者：Wei Zhou ; Wei Li ; Jian-Qiang Wang ; Yang Qu ; Ying Yang ; Ying Xie ; Kaifu Zhang ; Lei Wang ; Honggang Fu ; Dongyuan Zhao
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：July 2, 2014
• 年：2014
• 卷：136
• 期：26
• 页码：9280-9283
• 全文大小：322K
• ISSN：1520-5126

文摘

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 掳C. The resultant OMBT materials possess a relatively high surface area of 124 m² g^鈥? and a large pore size and pore volume of 9.6 nm and 0.24 cm³ g^鈥?, 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 渭mol h^鈥?), which is almost two times as high as that of pristine mesoporous TiO₂ (76.6 渭mol h^鈥?).