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Unprecedented Eighteen‐Faceted BiOCl with a Ternary Facet Junction Boosting Cascade Charge Flow and Photo‐redox
Author(s) -
Li Min,
Yu Shixin,
Huang Hongwei,
Li Xiaowei,
Feng Yibo,
Wang Cong,
Wang Yonggang,
Ma Tianyi,
Guo Lin,
Zhang Yihe
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201904921
Subject(s) - facet (psychology) , cascade , ternary operation , materials science , bismuth , photocatalysis , nanotechnology , chemical physics , chemical engineering , chemistry , catalysis , computer science , psychology , social psychology , biochemistry , personality , engineering , metallurgy , big five personality traits , programming language
Abstract 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) 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.