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Facile Fabrication of Nanoporous Bi 2 WO 6 Photoanodes for Efficient Solar Water Splitting
Author(s) -
Dong Guojun,
Zhang Yajun,
Wang Wei,
Wang Lei,
Bi Yingpu
Publication year - 2017
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201700138
Subject(s) - fabrication , nanoporous , materials science , water splitting , nanotechnology , chemical engineering , optoelectronics , catalysis , chemistry , photocatalysis , engineering , medicine , biochemistry , alternative medicine , pathology
Nanoporous bismuth tungsten oxide (Bi 2 WO 6 ) photoanodes are synthesized by using a facile drop‐casting strategy for one‐step fabrication. The Bi 2 WO 6 photoanode exhibits significantly improved solar photo‐electrochemical capability for water oxidation. The photocurrent density is nearly 10 times higher than the traditional particle photoanodes. In addition, synchronous illumination X‐ray photoelectron spectroscopy (SIXPS) was employed to directly identify the charge separation and electron transfer in the nanoporous Bi 2 WO 6 photoanodes, which clearly reveals that the electrons transfer from the Bi and W atomic sites to the O sites. These demonstrations provide further new insights into the origin of high efficiency in nanoporous photoanodes, which may be promising for the rational construction of solar conversion and storage devices.