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Enhancing Photooxidative Performance with Bi₂O₃ Nanoparticle-Modified BiVO₄ Heterostructural Flowers C

Wang, Wuyou, Wang, Xuewen, Cao, Zuqiang, Li, Qiuchan, Feng, Gang, Zhang, Rongbin
Journal of physical chemistry 2018 v.122 no.41 pp. 23582-23590
active sites, electrons, flowers, hot water treatment, hydrogen ions, irradiation, nanosheets, oxygen production, photocatalysis, photolysis, photooxidation, pollutants, sucrose, synergism
BiVO₄ is widely used in photodegradation and photocatalytic oxygen evolution under visible-light irradiation. In this study, to reduce the recombination rate of photoexcited electrons and holes and increase the reaction activity site, BiVO₄–Bi₂O₃ heterostructural flowers were fabricated by one-pot hydrothermal method by adjusting the concentration of hydrogen ions. Moreover, we used sucrose to control the morphology structure of BiVO₄ and form the BiVO₄–Bi₂O₃ heterostructural flowers. The BiVO₄–Bi₂O₃ heterostructural flowers exhibited a higher photodegradation rate of organic pollutant than product synthesized without sucrose, BiVO₄, and Bi₂O₃. The synergistic effect between BiVO₄ and Bi₂O₃ and the recombination frequency of photoexcited electrons and holes as influence factors of improving the photooxidative capability were widely explored. The flower-like morphology provided active sites, and the nanosheets of the flowers decreased the transport distance of the photoexcited carriers.