Journal
ELECTROCHIMICA ACTA
Volume 146, Issue -, Pages 378-385Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.08.136
Keywords
N-TiO2 inverse opals; CdS sensitization; Photocurrent density
Categories
Funding
- National Nature Science Foundation of China [91022032, 21171001, 21173001, 51372004, 21371003]
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials
- Anhui University Innovation Lab of Clean Energy and Environmental Catalysis
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The CdS sensitized N-TiO2 (CdS-N-TiO2) inverse opals films were prepared by a sol-gel method integrated with successive ionic layer adsorption and reaction (SILAR). In order to harvest the visible sunlight and enhance the photocurrent, photosensitization of CdS (narrow-bandgap semiconductor) and nitrogen doping are used to couple with TiO2 inverse opals. The good visible light absorption ability and significant increase of photoresponse of CdS-N-TiO2 inverse opals films have been observed compared to TiO2 or N-TiO2 inverse opals films. A promising photocurrent density of 0.83 mA/cm(2) has been achieved for the CdS-N-TiO2 inverse opal as photoanode at 1.23 mV versus reversible hydrogen electrode (RHE) bias under simulated solar-light illumination. Because the synergistic effect of CdS sensitization and N-doping with periodically ordered inverse opal nanostructures, the photocurrent density is enhanced in comparison to the pristine TiO2 inverse opals films. (C) 2014 Elsevier Ltd. All rights reserved.
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