Increasing Solar Absorption for Photocatalysis with Black Hydrogenated Titanium Dioxide Nanocrystals
Xiaobo ChenDepartment of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720, USALei LiuDepartment of Physics, University of California at Berkeley, Berkeley, CA 94720, USAPeter Y. YuDepartment of Physics, University of California at Berkeley, Berkeley, CA 94720, USASamuel S. MaoDepartment of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720, USA
2011en
ABI
Аннотация
When used as a photocatalyst, titanium dioxide (TiO(2)) absorbs only ultraviolet light, and several approaches, including the use of dopants such as nitrogen, have been taken to narrow the band gap of TiO(2). We demonstrated a conceptually different approach to enhancing solar absorption by introducing disorder in the surface layers of nanophase TiO(2) through hydrogenation. We showed that disorder-engineered TiO(2) 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.
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