Interlayer-I-doped BiOIO3 nanoplates with an optimized electronic structure for efficient visible light photocatalysis.
The success in the synthesis of Bi-based layered photocatalysts with high photocatalytic activities has triggered intensive studies. Herein, we prepared interlayer-I-doped BiOIO3 nanoplates by a facile method. Interestingly, it was found that I atoms were doped into the BiOIO3 interlayers instead of substituting for the lattice atoms based on theoretical and experimental results. The interbedded I atoms endowed BiOIO3 with an extended light response from the UV to the visible region by narrowing the bandgap and generating a middle level. The enhanced oxidation capability via positive-shifting the valence band position and improved carrier separation efficiency via forming charge delivery channels at the adjacent two layers can be achieved simultaneously. As expected, I-intercalated BiOIO3 with an optimized electronic structure demonstrated outstanding NO removal ability under visible light irradiation, much superior to pure BiOIO3. The present success in fabricating interlayer-I-doped BiOIO3 would open a promising route to prepare other Bi-based layered semiconductors with efficient visible-light photocatalysis.
Chongqing Key Laboratory of Catalysis and Functional Organic Molecules, Engineering Research Center for Waste Oil Recovery Technology and Equipment of Ministry of Education, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China. dfctbu@126.com.
Yanjuan
Y
Sun
Ting
T
Xiong
Fan
F
Dong
Hongwei
H
Huang
Wanglai
W
Cen