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

机构：[1] Henan Photoelectrocatalytic Material and Micro-Nano Application Technology Academician Workstation, Xinxiang University, Henan, Xinxiang, China; [2] College of Chemistry and Material Engineering, Xinxiang University, Xinxiang, 453003, China

第一机构：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：EI(收录号：20222012121923);Scopus(收录号：2-s2.0-85130092686)

语种：英文

外文关键词：Efficiency - Charge transfer - Rate constants - Ball milling - Heterojunctions - III-V semiconductors - Surface reactions - Photocatalytic activity - Boron nitride

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 × 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. ? 2022 The Royal Society of Chemistry