Effects of Mo sources on Mo doped SrTiO3 powder prepared by spray pyrolysis for H-2 evolution under visible light irradiation

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SrTiO3 was doped with three types of molybdenum ions (Mo6+, Mo4+, and Mo2+) by spray pyrolysis. The molybdenum ions narrowed the band gap of SrTiO3 to allow hydrogen evolution under visible-light irradiation. The molybdenum-doped SrTiO3 photocatalyst prepared from MoO2 (0.4 mol%) exhibited hydrogen evolution up to a rate of 1410.3 mol g(-1) h(-1) with an induction period of 1 h. The use of MoO2 resulted in SrTiO3 doping by Mo6+ and Mo4+ ions, which enhanced the hydrogen evolution by forming 4d-like states under the conduction band. The ionic structure of SrTiO3 doped with Mo4+ and Mo4+ could be expressed as Sr[Ti-1(-x-y)4+(Mox4+Moy6+)]O-3 from the X-ray photoelectron spectra. (C) 2016 Elsevier B.V. All rights reserved
Publisher
ELSEVIER SCIENCE BV
Issue Date
2016-09
Language
English
Article Type
Article
Keywords

AQUEOUS-METHANOL SOLUTION; RAY PHOTOELECTRON-SPECTROSCOPY; PHOTOCATALYTIC ACTIVITIES; ELECTRONIC-STRUCTURE; POLYMERIC PRECURSOR; MOLYBDENUM OXIDES; CODOPED TIO2; WATER; METAL; CHROMIUM

Citation

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS, v.211, pp.67 - 74

ISSN
0921-5107
DOI
10.1016/j.mseb.2016.06.006
URI
http://hdl.handle.net/10203/213513
Appears in Collection
CBE-Journal Papers(저널논문)
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