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Macroscopic Polarization Enhancement Promoting Photo‐ and Piezoelectric‐Induced Charge Separation and Molecular Oxygen Activation
Author(s) -
Huang Hongwei,
Tu Shuchen,
Zeng Chao,
Zhang Tierui,
Reshak Ali H.,
Zhang Yihe
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201706549
Subject(s) - piezoelectricity , polarization (electrochemistry) , radical , reactive oxygen species , catalysis , oxygen , chemical physics , chemistry , semiconductor , materials science , ion , photochemistry , nanotechnology , optoelectronics , composite material , organic chemistry , biochemistry
Efficient photo‐ and piezoelectric‐induced molecular oxygen activation are both achieved by macroscopic polarization enhancement on a noncentrosymmetric piezoelectric semiconductor BiOIO 3 . The replacement of V 5+ ions for I 5+ in IO 3 polyhedra gives rise to strengthened macroscopic polarization of BiOIO 3 , which facilitates the charge separation in the photocatalytic and piezoelectric catalytic process, and renders largely promoted photo‐ and piezoelectric induced reactive oxygen species (ROS) evolution, such as superoxide radicals ( . O 2 − ) and hydroxyl radicals ( . OH). This work advances piezoelectricity as a new route to efficient ROS generation, and also discloses macroscopic polarization engineering on improvement of multi‐responsive catalysis.