Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 277, Issue -, Pages 27-36Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2013.12.007
Keywords
Hydrothermal synthesis; Oxysulfide; Bismuth oxysulfide; Water splitting
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Funding
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER)
- World Premier International Research Center Initiative (WPI), MEXT, Japan
- Grants-in-Aid for Scientific Research [24686107, 26630497] Funding Source: KAKEN
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Oxide-chalcogenide semiconductors are proposed in order to attain a smaller band gap and improve efficiencies in comparison to oxides for light induced total water splitting. Dibismuthoxysulfide (Bi2O2S) was synthesized under relatively mild hydrothermal conditions. The synthesized compound was characterized by XRD, SEM and UV-vis DRS techniques. The band gap of 1.5 eV measured is smaller than 2.8 eV of bismuth oxide (Bi2O3). Photoelectrochemical studies showed that it is possible to utilize Bi2O2S and the Bi2O2S/In2O3 composite as n-type semiconductors. Dye modified Bi2O2S/In2O3 showed promise for the catalysis of water splitting. (C) 2013 Elsevier B.V. All rights reserved.
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