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Rational Band Gap Engineering of WO 3 Photocatalyst for Visible light Water Splitting
Author(s) -
Wang Fenggong,
Di Valentin Cristiana,
Pacchioni Gianfranco
Publication year - 2012
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201100446
Subject(s) - water splitting , visible spectrum , doping , band gap , impurity , materials science , tungsten , photocatalysis , conduction band , valence band , photochemistry , valence (chemistry) , oxide , redox , tungsten oxide , optoelectronics , chemistry , catalysis , physics , biochemistry , organic chemistry , quantum mechanics , electron , metallurgy
A band better than the Beatles? Tungsten oxide doping by hafnium induces a shift of the valence and conduction bands towards higher energies without losing the visible light absorption properties of the material and introducing impurity states in the gap. The new band edges position with respect to the redox potentials for both H 2 and O 2 evolution is suitable for efficient water splitting.