CHEN Jiakuo ¹, WANG Xiaoyu ¹, WANG Qianxilong ¹, PENG Junqi ¹, WANG Jiansheng ¹, ZHAO Yingna ^{1, 2}, ZENG Xiongfeng ^{1, 2}
(1. Hebei Inorganic Nonmetallic Materials Laboratory, School of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China; 2. Hebei (Tangshan) Ceramic Industry Technology Research Institute, Tangshan 063007, Hebei, China)

Abstract: As a semiconductor material, barium strontium titanate (BST) can be used in the field of photocatalysis, but its response to visible light is low and the photogenerated carriers are easy to recombine, so it needs to be modified by using different methods. BST is a semiconductor with piezoelectric effect, which can be used to increase the separation efficiency of photogenerated carriers through the built-in electric field, thereby improving photocatalytic performance. After being modified through light pressure synergy, adjusting composition, element doping and other methods, BST can be used for photocatalytic water splitting to produce hydrogen and degrading pollutants. The preparation process of BST, the mechanism of piezoelectric photocatalysis, and the research progress of BST in the field of photocatalysis of BST will be summarized and discussed.
Key words: strontium barium titanate; photocatalysis; piezoelectric effect