1. Visible light photocatalysis over solid acid: Enhanced by gold plasmonic effect
- Author
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Bin Shao, Feng Lin, Junying Zhang, Wang Huan, Masatake Haruta, Jiahui Huang, Shaohua Zhang, and Zhen Li
- Subjects
Materials science ,Process Chemistry and Technology ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Combustion ,Photochemistry ,01 natural sciences ,Catalysis ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Photocatalysis ,Rhodamine B ,Thiophene ,Surface plasmon resonance ,0210 nano-technology ,Plasmon ,General Environmental Science ,Visible spectrum - Abstract
Solar driven catalysis by semiconductors is considered as a promising route to mitigate environmental problems caused by the combustion of fossil fuels and water pollution. Surface plasmon resonance (SPR) has offered a new opportunity to overcome the limited efficiency of photocatalysts. Herein we report that the SPR-mediated visible-light-responsive photocatalyst, 0.5 wt.% Au/SO42−–TiO2, can achieve over 99% conversion of pollutants (thiophene, thiol, rhodamine B, and phenol) during photocatalytic oxidation with oxygen or air as oxidant under visible light irradiation. The considerable enhancement of photocatalytic activity can be attributed to the synergistic effect of Au SPR and Lewis acidic SO42−–TiO2 which are beneficial for the efficient separation and transfer of the photo-generated electrons and holes. Such a strategy would be important to the design and preparation of highly photocatalytic active semiconductor catalysts.
- Published
- 2017