具有增强氧生成的BiOCl中面内协同主导的Z型转变

Facet synergy dominant Z-scheme transition in BiOCl with enhanced O generation.

作者信息

Guan Chongshang, Hou Tian, Nie Wuyang, Zhang Qian, Duan Libing, Zhao Xiaoru

机构信息

MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions, Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Department of Applied Physics, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China.

出版信息

Chemosphere. 2022 Nov;307(Pt 1):135663. doi: 10.1016/j.chemosphere.2022.135663. Epub 2022 Jul 11.

DOI:10.1016/j.chemosphere.2022.135663

PMID:35835240

Abstract

BiOCl powders with different morphology were obtained through self-assembling. Their photocatalytic performance was tested through degradation of organic dye and mechanism of photocatalytic for obtained samples were investigated. Relevant characterization demonstrated that facet synergy was a main reason of photocatalytic performance promotion due to changed facet exposure and proportion under self-assembling. Theory and experimental analysis manifested that synergistic facet stimulated Z scheme transition in samples with lower (001) facet proportion, which provided favorable condition of O generation and simultaneously generated prominent charge separation. This work unveiled the facet synergy dominant photocatalytic performance improvement in self-assembling system of BiOCl and verified decisive role of facet proportion in constructing Z-scheme facet junction, which also prompted possibility of improving O generation through facet engineering under self-assembling.

摘要

通过自组装获得了具有不同形貌的BiOCl粉末。通过有机染料降解测试了它们的光催化性能，并研究了所得样品的光催化机理。相关表征表明，由于自组装过程中晶面暴露和比例的变化，晶面协同作用是光催化性能提升的主要原因。理论和实验分析表明，协同晶面在（001）晶面比例较低的样品中刺激了Z型跃迁，这为O的生成提供了有利条件，同时产生了显著的电荷分离。这项工作揭示了BiOCl自组装体系中晶面协同作用主导的光催化性能提升，并验证了晶面比例在构建Z型晶面结中的决定性作用，这也提示了通过自组装下的晶面工程提高O生成的可能性。