Nanostructured WO3/BiVO4 heterojunction films for efficient photoelectrochemical water splitting

Jinzhan Su; Liejin Guo; Ningzhong Bao; Craig A. Grimes

doi:10.1021/nl2000743

Nanostructured WO₃/BiVO₄ heterojunction films for efficient photoelectrochemical water splitting

Jinzhan Su, Liejin Guo, Ningzhong Bao, Craig A. Grimes

College of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

1008 Scopus citations

Abstract

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 WO ₃/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.

Original language	English
Pages (from-to)	1928-1933
Number of pages	6
Journal	Nano Letters
Volume	11
Issue number	5
DOIs	https://doi.org/10.1021/nl2000743
State	Published - 11 May 2011

Keywords

BiVO
WO
nanorod
nanowire
photoelectrochemical
photoelectrolysis

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Access to Document

10.1021/nl2000743

Cite this

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title = "Nanostructured WO3/BiVO4 heterojunction films for efficient photoelectrochemical water splitting",

abstract = "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 WO 3/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.",

keywords = "BiVO, WO, nanorod, nanowire, photoelectrochemical, photoelectrolysis",

author = "Jinzhan Su and Liejin Guo and Ningzhong Bao and Grimes, {Craig A.}",

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AU - Su, Jinzhan

AU - Guo, Liejin

AU - Bao, Ningzhong

AU - Grimes, Craig A.

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N2 - 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 WO 3/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.

AB - 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 WO 3/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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