卤氧化铋与半导体光催化剂偶合研究新进展

两种半导体耦合能够形成异质结而使系统的电荷分离效率得到提高，扩展对光谱吸收范围，以便提高其光催化性能。半导体耦合在制备过程中容易受到制备方法、反应温度等影响，引起耦合半导体晶体结构和表面性质发生变化，从而使得其光催化量子效率增大。主要从以下三个方面进行了论述，(1) 卤氧化铋-氧化物偶合体系, 将半导体材料与BiOX进行复合，能够形成高效异质结型结构能提高光催化降解污染物光催化性能; (2)AgX-BiOX偶合体系, 与纯净的AgI或BiOI相比，复合光催化材料AgI/BiOI在可见光下具有更高的光催化反应活性。(3)卤氧化铋与其它化合物偶合体系，Bi₂S₃与BiOX进行偶合后，光生电子在两种催化剂中进行迁移，提高了电子与空穴分离效率，因而偶合物的光催化性能得到提高。另外，本文综述了近年来国内外半导体耦合制备方法、影响其光催化性能的因素、提高可见光利用效率的最新研究进展，并提出在半导体耦合研究中所要解决的主要问题及今后努力方向。

The Latest Research Progress of Coupling between BiOX and Semiconductor Photocatalyst

The heterojunction was formed between two kinds of coupling semiconductors ,which improved the charge separation efficiency of system,widened the spectral response range of catalysts and improved photocatalytic propertirs of catalysts.The process of preparation of semiconductors coupling was easily affected by preparation methods and reaction temperature and so on,which would cause the changes in crystal structure and surface properties of coupling semiconductors,thus photocatalytic quantum efficiency of coupling semiconductors was increased.In this article,the following three aspects were mainly discussed. (1)About the coupled system of halogen bismuth oxide and oxide,because generaling BiOX with the semiconductor material compound,the efficient heterojunction structure could be formed,photocatalytic performances of the photocatalytic degradation of pollutants were improved.(2)About the coupled system of AgX and BiOX,compared with the pure AgI or BiOI,composite photocatalytic materials of AgI/BiOI had higher photocatalytic reactivity in visible light.(3)About the coupled system of halo-gen bismuth oxide and other compounds,after Bi2 S3 coupled with BiOX,photoproduction electronic migrated in the two kinds of catalysts,the separation efficiency of electrons and holes was improved,and photocatalytic performances of coupling compound were improved.In addition,in recent years,the latest research progress of the preparation method,the influencing factors of the photocatalytic performance and improving the utilization efficiency of visible light of semiconductors coupling at home and abroad was reviewed in this paper.Finally,the main problems and the future striving direction in semiconductors coupling were presen-ted.