Exploiting recyclable and reusable photocatalysts in pollutants elimination and water splitting has drawn extensive research attention for solving the increasing energy and environmental issues. Herein, we designed a high-performance dual functional AgPO/three-dimensional (3D) graphene aerogel (APGA) photocatalyst, in which the 3D GA with extremely lightweight and high mechanical stability served as the support for AgPO particles, preventing the serious weight loss during the recovery process. Moreover, different from the traditional powder photocatalysts, the application of 3D GA support avoided the secondary contamination caused by the catalyst residue during the reaction. The abundant hydroxyl groups on the surface of porous 3D GA prevented the aggregation of AgPO particles, forming a close interfacial contact. Profiting from the large number of active sites and high conductivity of 3D GA, the optimized APGA-12 sample showed excellent O generation (814.1 μmol·g) and synchronous Cr (VI) reduction (87.5 %) efficiency. In addition, the APGA-12 sample also exhibited excellent carbamazepine (CBZ) degradation activity (99 % within 30 min) in the presence of peroxymonosulfate (PMS). Cycling experiments combined with the scaled-up reactions verified the good mechanical and chemical stability of APGA samples. This work provided a promising strategy for solving the problems of catalyst recycling in the field of pollutant degradation and water oxidation.

中文翻译：

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可回收双功能 Ag3PO4/3D 石墨烯气凝胶光催化剂，可同时实现水氧化和污染物降解

为了解决日益严重的能源和环境问题，利用可回收和可重复使用的光催化剂消除污染物和水分解已引起广泛的研究关注。在此，我们设计了一种高性能双功能AgPO/三维（3D）石墨烯气凝胶（APGA）光催化剂，其中极其轻质和高机械稳定性的3D GA作为AgPO颗粒的支撑，防止了严重的重量损失在恢复过程中。而且，与传统粉末光催化剂不同，3D GA载体的应用避免了反应过程中催化剂残留造成的二次污染。多孔3D GA表面丰富的羟基阻止了AgPO颗粒的聚集，形成紧密的界面接触。得益于3D GA的大量活性位点和高电导率，优化后的APGA-12样品表现出优异的O生成效率（814.1 μmol·g）和同步Cr（VI）还原效率（87.5 %）。此外，APGA-12 样品在过一硫酸盐 (PMS) 存在下还表现出优异的卡马西平 (CBZ) 降解活性（30 分钟内 99%）。循环实验结合放大反应验证了APGA样品良好的机械和化学稳定性。这项工作为解决污染物降解和水氧化领域的催化剂回收问题提供了一种有前途的策略。