title: An α-Bi2O3/BiOBr core-shell heterojunction with high photocatalytic activity.
abstract: We prepared an α-Bi2O3/BiOBr core-shell heterojunction via a facile in situ chemical transformation method. Ultrathin BiOBr nanosheets were observed and these were found to be evenly distributed on the surface of α-Bi2O3/BiOBr by SEM and TEM. The results revealed that the prepared α-Bi2O3/BiOBr photocatalysts were porous, and their specific surface areas were found to be raised on comparing with α-Bi2O3and BiOBr. In our experiments, the photocatalytic activity of α-Bi2O3was obviously enhanced when assembling with ultrathin BiOBr compared with α-Bi2O3/BiOBr and the individual phase. It is considered that the surface porous structure increases the specific surface areas, which improved the adsorption characteristics of α-Bi2O3/BiOBr. The suitable band alignment (between α-Bi2O3and BiOBr) and oxygen vacancy effect can be attributed to the increased photocatalytic activity under visible irradiation.
authors.affiliation: College of Material Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China. Shlw0531@163.com.
authors.forename: Lianwei
authors.identifier: http://orcid.org/0000-0001-6989-280X
authors.initials: L
authors.lastname: Shan
authors.affiliation: College of Material Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China. Shlw0531@163.com.
authors.forename: Yuteng
authors.initials: Y
authors.lastname: Liu
authors.affiliation: College of Material Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China. Shlw0531@163.com.
authors.forename: Hongtao
authors.initials: H
authors.lastname: Chen
authors.affiliation: College of Material Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China. Shlw0531@163.com.
authors.forename: Ze
authors.initials: Z
authors.lastname: Wu
authors.affiliation: College of Material Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China. Shlw0531@163.com.
authors.forename: Zhidong
authors.initials: Z
authors.lastname: Han