As a new advanced oxidation technology, photocatalytic technology has broad application prospects in the field of wastewater treatment. However, in the actual use process, there will be difficulties in catalyst recovery and reuse. This article successfully prepared bacterial cellulose (BC) loaded silver and titanium dioxide nanoparticles (Ag-plated TiO₂/BC composite pellicle) by in situ embedding method. BC not only works as the carrier to load TiO₂ and Ag NPs but also adsorbs dyes to promote the reaction. As a reusable photocatalytic film, it is convenient to use and recycle in terms of testing and characterization compared with powders. The results show that Ag and TiO₂ nanoparticles were closely embedded in BC. We evaluated the photocatalytic degradation performance of the catalyst on methylene blue (MB), active red X-3B, and Rhodamine B. When the reaction time was 2 h, the dye removal rates were 71%, 68%, and 82.6%. At the same time, through the inhibition zone experiment, it was found that the material has a certain inhibitory effect on both Escherichia coli and Staphylococcus aureus. Therefore, the supported catalyst prepared by this method has the advantages of high catalytic activity, relatively stable property, easy recovery, and tailorability, making it potentially applicable in sewage post-treatment links.

中文翻译：

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高效负载Ag和TiO2纳米颗粒的细菌纤维素制备去除有机染料

光催化技术作为一种新型的高级氧化技术，在废水处理领域有着广阔的应用前景。但在实际使用过程中，催化剂的回收和再利用会遇到困难。本文采用原位包埋法成功制备了负载细菌纤维素(BC)的银和二氧化钛纳米粒子(Ag镀TiO ₂ /BC复合薄膜)。BC 不仅可以作为负载 TiO ₂和 Ag NPs的载体，还可以吸附染料以促进反应。作为一种可重复使用的光催化薄膜，与粉末相比，在测试和表征方面使用和回收方便。结果表明，Ag和TiO ₂纳米颗粒紧密嵌入 BC 中。我们评估了催化剂对亚甲蓝 (MB)、活性红 X-3B 和罗丹明 B 的光催化降解性能。当反应时间为 2 h 时，染料去除率分别为 71%、68% 和 82.6%。同时通过抑菌圈实验发现，该物质对大肠杆菌和金黄色葡萄球菌均有一定的抑制作用。因此，该方法制备的负载型催化剂具有催化活性高、性能相对稳定、易于回收和可定制等优点，在污水后处理环节具有潜在的应用价值。