Abstract A multifunctional Ag3PO4@AgBr-polyurethane/negative ion powder (Ag3PO4@AgBr-PU/NI) composite film is obtained by a combination of nonsolvent induced phase separation (NIPS) and an impregnation-precipitation-ion exchange method. The PU/NI composite film has an asymmetric porous structure and is used as a support to provide sites for the in situ loading of Ag3PO4@AgBr particles. Various analytical techniques are applied to explore the characteristic properties of the films. The photocatalytic activity and recyclability of the films are assessed by the decomposition of methyl orange (MO) in recycling processes under visible light irradiation. The Ag3PO4@AgBr-PU/NI composite film exhibits higher photocatalytic activity than the Ag3PO4 -PU/NI and AgBr-PU/NI composite films. Moreover, up to approximately 85% of the photocatalytic efficiency of the Ag3PO4@AgBr-PU/NI composite film is retained after three-cycle testing. A possible photocatalytic mechanism for the Ag3PO4@AgBr-PU/NI film is proposed based on active species trapping experiments and a theoretical analysis. The composite films display a broad-spectrum antibacterial property against Gram-negative E. coli and Gram-positive S. aureus. This work may provide a simple pathway to construct a highly efficient polyurethane composite film reactor for organic pollutants degradation and bacterial inactivation.

中文翻译：

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可见光响应Ag3PO4@AgBr颗粒原位负载聚氨酯/负离子粉末复合膜用于光催化和抗菌应用

摘要 采用非溶剂诱导相分离（NIPS）和浸渍-沉淀-离子交换法相结合，获得了多功能Ag3PO4@AgBr-聚氨酯/负离子粉体（Ag3PO4@AgBr-PU/NI）复合膜。PU/NI 复合薄膜具有不对称的多孔结构，用作载体为 Ag3PO4@AgBr 颗粒的原位加载提供位点。应用各种分析技术来探索薄膜的特性。通过在可见光照射下回收过程中甲基橙（MO）的分解来评估薄膜的光催化活性和可回收性。Ag3PO4@AgBr-PU/NI复合膜比Ag3PO4-PU/NI和AgBr-PU/NI复合膜表现出更高的光催化活性。而且，经过三轮测试后，Ag3PO4@AgBr-PU/NI 复合膜的光催化效率高达约 85%。基于活性物质捕获实验和理论分析，提出了一种可能的 Ag3PO4@AgBr-PU/NI 膜的光催化机制。复合膜显示出对革兰氏阴性大肠杆菌和革兰氏阳性金黄色葡萄球菌的广谱抗菌性能。这项工作可能为构建高效的聚氨酯复合膜反应器用于有机污染物降解和细菌灭活提供了一种简单的途径。复合膜显示出对革兰氏阴性大肠杆菌和革兰氏阳性金黄色葡萄球菌的广谱抗菌性能。这项工作可能为构建高效的聚氨酯复合膜反应器用于有机污染物降解和细菌灭活提供了一种简单的途径。复合膜显示出对革兰氏阴性大肠杆菌和革兰氏阳性金黄色葡萄球菌的广谱抗菌性能。这项工作可能为构建高效的聚氨酯复合膜反应器用于有机污染物降解和细菌灭活提供了一种简单的途径。