Bismuth oxybromide (BiOBr) nanosheets are exciting photocatalysts for microbial disinfection and organic dye degradation. However, it remains a great challenge to easily recycle these nanomaterials and improve their photocatalytic ability. Herein, we constructed a novel photocatalytic BiOBr@PAG gel containing BiOBr nanosheets and polyacrylamide gel (PAG), based on peroxydisulfate‐induced polymerization reaction. The photocatalytic gel had equally distribution of BiOBr nanosheets on the surface, and could be easily recycled from water. More strikingly, the gel could also rapidly kill all tested pathogenic bacteria (i. e., Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus) under irradiation. Its disinfection activity is attributed to remarkable intracellular ROS production and oxidative cell damage. Furthermore, the gel had higher photocatalytic activity than BiOBr nanosheets alone during degradation of organic dyes. This study developed a novel strategy for preparation of easy‐recycling and high‐efficiency photocatalytic systems for practical application in environmental treatment and medicinal disinfection.

中文翻译：

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用于病原菌消毒和有机污染物降解的回收光催化凝胶的构建。

氢溴酸铋（BiOBr）纳米片是用于微生物消毒和有机染料降解的令人兴奋的光催化剂。然而，容易回收这些纳米材料并提高其光催化能力仍然是巨大的挑战。在此，我们基于过二硫酸盐诱导的聚合反应，构建了一种包含BiOBr纳米片和聚丙烯酰胺凝胶（PAG）的新型光催化BiOBr @ PAG凝胶。该光催化凝胶在表面上均匀分布了BiOBr纳米片，可以很容易地从水中回收利用。更惊人的是，该凝胶还可以迅速杀死所有测试的致病细菌（即，大肠杆菌，铜绿假单胞菌和金黄色葡萄球菌）。）照射下。其消毒活性归因于显着的细胞内ROS产生和氧化性细胞损伤。此外，在有机染料降解期间，该凝胶比单独的BiOBr纳米片具有更高的光催化活性。这项研究为在环境处理和药物消毒中的实际应用开发了一种易于回收和高效光催化系统制备的新策略。