Photocatalytic Material: WO3

As a photocatalytic material, WO3 has high photocatalytic activity and stability, so it has good industrial application prospects in the field of photocatalysis. You know, ethylene is harmful for storage and fresh-keeping of fruits and vegetables. Photocatalytic technology is an effective and environmentally friendly approach for degrading ethylene. Some experts have synthesized a WO3 photocatalyst using synergetic internal Fe3+ doping and superficial Pt loading for ethylene degradation under visible-light irradiation.

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The results showed that 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.

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