文献类型：期刊文献

英文题名：Robust photocatalytic activity of two-dimensional h-BN/Bi2O3 heterostructure quantum sheets

作者：Zhou, Jianwei[1,2];Duo, Fangfang[1];Wang, Chubei[1];Chu, Liangliang[1];Zhang, Mingliang[1];Yan, Donglei[2]

第一作者：周建伟

通讯作者：Zhou, JW[1];Zhou, JW[2]

机构：[1]Xinxiang Univ, Henan Photoelectrocatalyt Mat & Micronano Applica, Xinxiang, Henan, Peoples R China;[2]Xinxiang Univ, Coll Chem & Mat Engn, Xinxiang 453003, Henan, Peoples R China

第一机构：新乡学院

通讯机构：[1]corresponding author), Xinxiang Univ, Henan Photoelectrocatalyt Mat & Micronano Applica, Xinxiang, Henan, Peoples R China;[2]corresponding author), Xinxiang Univ, Coll Chem & Mat Engn, Xinxiang 453003, Henan, Peoples R China.|[11071]新乡学院;

年份：2022

卷号：12

期号：21

起止页码：13535-13547

外文期刊名：RSC ADVANCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000790420600001)】；

基金：This work is supported by the Project of Science and Technology of the Henan Province (192102310496).

语种：英文

摘要：Herein, defect intrinsic hexagonal boron nitride (h-BN) quantum sheets (QS) and bismuth oxide (Bi2O3) QS were prepared from bulk materials by ball milling and solvent stripping, respectively. The h-BN/Bi2O3 heterostructure was fabricated via a facile self-assembly method. The structure and performance of samples were systematically characterized. As expected, the layered h-BN QS is tightly coated on the surface of Bi2O3 QS in a face-to-face stacking structure and interconnected by strong interface interactions. The introduction of h-BN QS can significantly enhance the separation efficiency of the photogenerated carriers of h-BN/Bi2O3. The experimental results show that the photocatalytic activity of h-BN/Bi2O3 is markedly improved. The first-order reaction rate constant of the 3wt%-BN/Bi2O3 sample is 3.2 x 10(-2) min(-1), about 4.5 times that of Bi2O3 QS. By means of the active species capture test, it is found that the main oxidation species are holes (h(+)), followed by hydroxyl radicals (OH). Based on the surface charge transfer characteristics, the photogenerated carrier transfer and separation efficiency can be improved by coupling h-BN and a Bi2O3 semiconductor to the Schottky heterojunction, and the strong interaction between heterogeneous interfaces also enhances the surface catalytic reaction efficiency, which improves dramatically the photocatalytic performance.