Increasing solar absorption for photocatalysis with black hydrogenated titanium dioxide nanocrystals

Xiaobo Chen, Lei Liu, Peter Y. Yu, Samuel S. Mao

Research output: Contribution to journalArticlepeer-review

5374 Scopus citations

Abstract

When used as a photocatalyst, titanium dioxide (TiO2) absorbs only ultraviolet light, and several approaches, including the use of dopants such as nitrogen, have been taken to narrow the band gap of TiO2. We demonstrated a conceptually different approach to enhancing solar absorption by introducing disorder in the surface layers of nanophase TiO2 through hydrogenation. We showed that disorder-engineered TiO2 nanocrystals exhibit substantial solar-driven photocatalytic activities, including the photo-oxidation of organic molecules in water and the production of hydrogen with the use of a sacrificial reagent.

Original languageBritish English
Pages (from-to)746-750
Number of pages5
JournalScience
Volume331
Issue number6018
DOIs
StatePublished - 11 Feb 2011

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