Journal
CHEMOSPHERE
Volume 257, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2020.127210
Keywords
Bi2O3/BiOI; One-dimensional heterojunction; Photocatalytic cr(VI) reduction; Green synthesis process
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Funding
- National Natural Science Foundation of China [21878031]
- Liaoning Revitalization Talents Program [XLYC1802124]
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BiOI nanosheets have been successfully deposited on the porous Bi2O3 nanorobs via a one-pot precipitation method. The physicochemical features of the as-prepared materials were characterized in detail by a series of techniques, and the results revealed that BiOI nanosheets were evenly distributed on the porous Bi2O3 nanorobs. Because of higher photogenerated electron-hole pairs separation efficiency and the larger specific surface area compared to the pristine Bi2O3 and BiOI, the 50%Bi2O3/BiOI composite exhibited significantly enhanced photocatalytic activity for Cr(VI) reduction under visible light irradiation, and the reduction rate constant was 0.02002 min(-1), which was about 27.4 and 2.6 times higher than that of pure Bi2O3 (0.00073 min(-1)) and BiOI (0.00769 min(-1)), respectively. Moreover, the 50%Bi2O3/BiOI composite also possessed the excellent photochemical stability and recyclability, thereby facilitating its wastewater treatment application. (C) 2020 Elsevier Ltd. All rights reserved.
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