Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 135, Issue 47, Pages 17831-17838Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja4076748
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Funding
- NSF of China [51125006, 91122034, 51121064, 61376056]
- 863 Programs of China [2011AA050505]
- CAS [KJCX2-EW-W11, KGZD-EW-303]
- STC of Shanghai [13JC1405700]
- U.S. National Science Foundation [CBET-1150617]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [1150617] Funding Source: National Science Foundation
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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 shell nanostructured S-doped rutile TiO2 (R'-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 (TiO2-x:S) boosts the photocatalytic water cleaning and water splitting with a steady solar hydrogen production rate of 0.258 mmol h(-1) g(-1). 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.
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