Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 9, Issue 3, Pages 652-658Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8cy02375a
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Funding
- National Natural Science Foundation of China [51602179, 21333006, 21573135, 11374190]
- National Basic Research Program of China (973 Program) [2013CB632401]
- Recruitment Program for Young Professionals, China
- Taishan Scholar Foundation of Shandong Province, China
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Ethylene (C2H4) is harmful for storage and fresh-keeping of fruits and vegetables. Photocatalytic technology is an effective and environmentally friendly approach for degrading ethylene. Herein, we first report the synthesis of a WO3 photocatalyst with high photocatalytic activity and stability using synergetic internal Fe3+ doping and superficial Pt loading for ethylene degradation under visible-light irradiation. Internal Fe3+ doping not only enhances the visible-light absorption but also improves the stability to some degree due to more positive reduction potential of Fe3+/Fe2+ than that of W6+/W5+ and separation efficiency of the photo-generated carriers. Furthermore, the loading of Pt as a co-catalyst through the photo-reduction of H2PtCl6 on the surface of Fe-doped WO3 promotes the effective transfer of photo-generated electrons and reduces the photo-corrosion of WO3. Due to the synergistic effect, extremely high degradation speed can be achieved by doping 0.25 mol% Fe and loading 0.75 wt% Pt for WO3, which exceeds that of pristine WO3 by about 3.3 times under visible-light irradiation. In addition, due to the excellent stability of Pt@Fe-doped WO3, it has good industrial application prospects in the field of photocatalysis.
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