标题：A Z-Scheme Polyimide/AgBr@Ag Aerogel with Excellent Photocatalytic Performance for the Degradation of Oxytetracycline
作者：Zhao, Xinfu; Wang, Xinqiang; Zhang, Jian; Yi, Xibin
作者机构：[Zhao, Xinfu; Yi, Xibin] Qilu Univ Technol, Shandong Acad Sci, Adv Mat Inst, Shandong Prov Key Lab Special Silicone Containing, Jinan 250014, Shandong 更多
通讯作者：Yi, XB;Zhang, J;Zhang, Jian
通讯作者地址：[Yi, XB]Qilu Univ Technol, Shandong Acad Sci, Adv Mat Inst, Shandong Prov Key Lab Special Silicone Containing, Jinan 250014, Shandong, Peoples R China 更多
来源：CHEMISTRY-AN ASIAN JOURNAL
关键词：antibiotics; heterogeneous catalysis; nanostructures; photocatalysis;; sol-gel processes
摘要：A novel Z-scheme polyimide (PI)/AgBr@Ag aerogel photocatalyst has been successfully synthesized by combining an in situ precipitation method and a supercritical drying method. The as-prepared PI/AgBr@Ag-50 (50 wt % AgBr@Ag in PI/AgBr@Ag) aerogel photocatalyst exhibited excellent photocatalytic activity for oxytetracycline degradation with a rate constant of 0.025 min(-1), which was 6.9 and 2.6 times higher than that of the PI aerogel or the AgBr@Ag nanoparticles, respectively. More significantly, the PI/AgBr@Ag-50 aerogel photocatalyst showed stable cycling, which could be attributed to the high mechanical strength and 3D network of the PI aerogel. The introduction of AgBr@Ag on PI with a heterojunction structure efficiently promoted the separation of electron-hole pairs by a Z-scheme mechanism. The reduced metallic Ag nanoparticles were found to function as centers for the transfer of electrons from AgBr to PI. This work has revealed a new application for the aerogel PI/AgBr@Ag photocatalyst in environmental protection.