期刊
NANO LETTERS
卷 11, 期 5, 页码 1928-1933出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl2000743
关键词
WO3; BiVO4; nanorod; nanowire; photoelectrochemical; photoelectrolysis
类别
资金
- National Basic Research Program of China [2009CB220000]
- National Natural Science Foundation of China [50821064]
We report on a novel heterojunction WO3/BiVO4 photoanode for photoelectrochemical water splitting. The heterojunction films are prepared by solvothermal deposition of a WO3 nanorod-array film onto fluorine-doped tin oxide (FTO) coated glass, with subsequent deposition of a low bandgap, 2.4 eV, visible light responding BiVO4 layer by spin-coating. The heterojunction structure offers enhanced photoconversion efficiency and increased photocorrosion stability. Compared to planar WO3/BiVO4 heterojunction films, the nanorod-array films show significantly improved photoelectrochemical properties due, we believe, to the high surface area and improved separation of the photogenerated charge at the WO3/BiVO4 interface. Synthesis details are discussed, with film morphologies and structures characterized by field emission scanning electron microscopy and X-ray diffraction.
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