Journal
MATERIALS CHEMISTRY FRONTIERS
Volume 4, Issue 6, Pages 1671-1678Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0qm00042f
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Funding
- National Key Research and Development Program of China [2016YFB0701100]
- National Natural Science Foundation of China [21835002, 21621001]
- 111 Project [B17020]
- Post Doctoral Innovative Talent Support Program [BX20180122]
- China Postdoctoral Science Foundation [2019M651195]
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Efficient charge separation and light harvesting of photocatalysts (e.g., TiO2) are the key issues to be considered in the design of solar-energy conversion systems. In particular, the charge separation of noble metal-decorated TiO2 materials could be greatly improved via decreasing the size of noble metal particles (NPs). Furthermore, designing specific morphologies such as hollow structures can improve light harvesting ability. Herein, a hybrid hollow TiO2 with spatially separated bimetals (Pd@TiO2@Au) was prepared, which demonstrated enhanced charge separation. By choosing zeolite as the sacrificial substrate, ultrasmall Pd NPs and Au NPs were decorated in the inner and outer shells of hollow TiO2, respectively. The separated bimetals could pull the photoexcited electrons away from the surface of TiO2 for more efficient charge separation. The as-prepared Pd@TiO2@Au catalyst exhibited a superior photocatalytic H-2 evolution rate up to 272.3 mu mol h(-1), which was higher than most of the TiO2-based photocatalysts.
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