Crystal defect is well-known to have a significant effect on the photocatalytic performance of semiconductors. Herein, defect-rich and-poor BaSn(OH)6(BSOH-Sn and BSOH-Ba) photocatalysts were synthesized by exchanging ...Crystal defect is well-known to have a significant effect on the photocatalytic performance of semiconductors. Herein, defect-rich and-poor BaSn(OH)6(BSOH-Sn and BSOH-Ba) photocatalysts were synthesized by exchanging the addition order of Ba and Sn. Results show that the defect-poor BSOH-Ba exhibited more efficient toluene degradation under ultraviolet(UV) light, which could attribute to the great suppression of photogenerated electron-hole(e--h+) pairs recombination by tuning the defect concentration. The low defect concentration in BSOH-Ba finally promotes the charge separation efficiency, the generation of reactive oxygen species(ROS), and the photocatalytic toluene degradation reactions. This work not only provides an effective way to inhibit the recombination of photogenerated carriers and improve the photocatalytic performance, but also promotes the understanding of defective perovskite-type hydroxide for more photoreactions.展开更多
基金supported by the National Natural Science Foundation of China (Nos. 22176029, 21822601, 51908091, and 52200122)the Natural Science Foundation of Chongqing (No. cstc2019jcyj-msxm X0213)+1 种基金the Science and Technology Research Project of Chongqing Education Commission (No. KJQN202200806)the Start-up Foundation of High-level Talents in Chongqing Technology and Business University (Nos. 2256006 and 1856044)。
文摘Crystal defect is well-known to have a significant effect on the photocatalytic performance of semiconductors. Herein, defect-rich and-poor BaSn(OH)6(BSOH-Sn and BSOH-Ba) photocatalysts were synthesized by exchanging the addition order of Ba and Sn. Results show that the defect-poor BSOH-Ba exhibited more efficient toluene degradation under ultraviolet(UV) light, which could attribute to the great suppression of photogenerated electron-hole(e--h+) pairs recombination by tuning the defect concentration. The low defect concentration in BSOH-Ba finally promotes the charge separation efficiency, the generation of reactive oxygen species(ROS), and the photocatalytic toluene degradation reactions. This work not only provides an effective way to inhibit the recombination of photogenerated carriers and improve the photocatalytic performance, but also promotes the understanding of defective perovskite-type hydroxide for more photoreactions.
