Increasing solar absorption for photocatalysis with black hydrogenated titanium dioxide nanocrystals.
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.
Lawrence Berkeley National Laboratory, University of California at Berkeley, Berkeley, CA 94720, USA.
Xiaobo
X
Chen
Lei
L
Liu
Peter Y
PY
Yu
Samuel S
SS
Mao