Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 28, Pages 9517-9521Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201904921
Keywords
bismuth; facet junctions; hydrogen production; hydroxyl radicals evolution; photocatalysis
Categories
Funding
- National Natural Science Foundations of China [51672258]
- Fundamental Research Funds for the Central Universities [2652018290]
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Exposure of anisotropic crystal facets allows the directional transfer of photoexcited electrons (e(-)) and holes (h(+)), for spatial charge separation. High-index facets with a high density of low-coordinated atoms always serve as reactive catalytic sites. However, preparation of multi-facets or high-index facets is highly challenging for layered bismuth-based photocatalysts. Herein, we report the preparation of unprecedented eighteen-faceted BiOCl with {001} top facets and {102} and {112} oblique facets via a hydrothermal process. Compared to the conventional BiOCl square plates with {001} top facets and {110} lateral facets, the eighteen-faceted BiOCl has highly enhanced photocatalytic activity for H-2 evolution and hydroxyl radicals ((OH)-O-.) production. Theoretical calculations and photodeposition results disclose that the of eighteen-faceted BiOCl has a well-matched {001}/{102}/{112} ternary facet junction, which provides a cascade path for more efficient charge flow than the binary facet junction in BiOCl square plates.
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