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.

中文翻译：

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具有出色光催化性能的AZ-Scheme聚酰亚胺/ AgBr @ Ag气凝胶可降解土霉素

结合原位沉淀法和超临界干燥法成功合成了新型的Z型聚酰亚胺（PI）/ AgBr @ Ag气凝胶光催化剂。制备的PI / AgBr @ Ag-50（PI / AgBr @ Ag中50 wt％AgBr @ Ag）气凝胶光催化剂对土霉素的降解表现出优异的光催化活性，速率常数为0.025 min ^-1分别是PI气凝胶或AgBr @ Ag纳米颗粒的6.9和2.6倍。更重要的是，PI / AgBr @ Ag-50气凝胶光催化剂显示出稳定的循环，这可以归因于PI气凝胶的高机械强度和3D网络。在具有异质结结构的PI上引入AgBr @ Ag可以通过Z方案机制有效地促进电子-空穴对的分离。发现还原的金属Ag纳米颗粒充当电子从AgBr转移到PI的中心。这项工作揭示了气凝胶PI / AgBr @ Ag光催化剂在环境保护中的新应用。