Morphology-dependent photocatalytic activity of Bi5O7I: Different charge separation efficiencies caused by facet synergy and internal electric field

Haoqiang Cheng,Jiang Wu,Qizhen Liu,Yongfeng Qi,Mingyan Gu,Yuyu Lin,Bin Hu,Xiaoyan Zhao,Yixuan Xiao,Jiaxi Wu

doi:10.1016/j.matlet.2019.06.001

Morphology-dependent photocatalytic activity of Bi5O7I: Different charge separation efficiencies caused by facet synergy and internal electric field

Haoqiang Cheng, Jiang Wu + Show 8 more

https://doi.org/10.1016/j.matlet.2019.06.001

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Journal: Materials letters	Publication Date: Jun 1, 2019
Citations: 14

Affiliation: Shanghai University of Electric Power, Zhejiang Environmental Monitoring Center, Yangzhou University, Anhui University of Technology, Shanghai Jiao Tong University

#Charge Separation Efficiencies #Bi5O7I Nanosheets + Show 8 more

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Abstract

Bi5O7I nanosheets and Bi5O7I nanorods photocatalysts were successfully fabricated by calcination and hydrothermal methods respectively. The different morphologies of Bi5O7I were characterized by XRD, SEM, HRTEM, UV–vis DRS and PL. The as-prepared samples were used to photocatalytic removal of Hg0 under visible-light irradiation. The results indicated that the photocatalytic activity of Bi5O7I nanorods is better than that of Bi5O7I nanosheets. It can be attributed to the synergistic and internal electric field effects of the (0 0 1) and (1 0 0) facets of Bi5O7I nanorods, which improves the photogenerated charge transfer and separation efficiency.

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