Core-Shell Nanostructured 鈥淏lack鈥?Rutile Titania as Excellent Catalyst for Hydrogen Production Enhanced by Sulfur Doping

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• 作者：Chongyin Yang ; Zhou Wang ; Tianquan Lin ; Hao Yin ; Xujie L眉 ; Dongyun Wan ; Tao Xu ; Chong Zheng ; Jianhua Lin ; Fuqiang Huang ; Xiaoming Xie ; Mianheng Jiang
• 刊名：Journal of the American Chemical Society
• 出版年：2013
• 出版时间：November 27, 2013
• 年：2013
• 卷：135
• 期：47
• 页码：17831-17838
• 全文大小：611K
• 年卷期：v.135,no.47(November 27, 2013)
• ISSN：1520-5126

文摘

Modification of rutile titanium dioxide (TiO₂) for hydrogen generation and water cleaning is a grand challenge due to the chemical inertness of rutile, while such inertness is a desired merit for its stability in photoelectrochemical applications. Herein, we report an innovative two-step method to prepare a core鈥搒hell nanostructured S-doped rutile TiO₂ (R鈥?TiO₂-S). This modified black rutile TiO₂ sample exhibits remarkably enhanced absorption in visible and near-infrared regions and efficient charge separation and transport. As a result, the unique sulfide surface (TiO_2鈥?i>x:S) boosts the photocatalytic water cleaning and water splitting with a steady solar hydrogen production rate of 0.258 mmol h^鈥? g^鈥?. The black titania is also an excellent photoelectrochemical electrode exhibiting a high solar-to-hydrogen conversion efficiency of 1.67%. The sulfided surface shell is proved to be an effective strategy for enhancing solar light absorption and photoelectric conversion.