The Au–TiO/Bacterial cellulose aerogel nanocomposites (Au–TiO/BC NCs) with remarkable photocatalytic properties and designed to solve agglomeration and reusability challenges in wastewater treatment have been successfully synthesized. The integration of gold nanoparticles (Au NPs) with TiO, in conjunction with bacterial cellulose (BC) serving as a three-dimensional nanostructure, resulted in the formation of Au–TiO/BC NCs through mechanical compositing, a confirmation obtained through various characterization techniques including XRD, SEM, SEM-EDS, TEM, TEM-EDS, BET, XPS, FT-IR, Spectrofluorometer, Raman, and UV–vis spectroscopy. The combination of Au–TiO nanoparticles with BC showcased homogeneous coverage over BC nanostructures, attributed to BC's unique properties, particularly its surface hydroxyl groups that prevent TiO agglomeration, along with uniform distribution of Au nanoparticles on TiO layers. Photocatalytic activity, assessed through methylene blue (MB) degradation under both UV and direct sunlight irradiation, demonstrated significantly improved efficiency with AuNPs, achieving approximately 90% degradation in the Au–TiO/BC NCs under UV irradiation. The synthesized NCs exhibited stability with a slight performance reduction after cyclic tests, indicating potential for wastewater treatment applications under diverse light conditions. The integration of Au NPs onto TiO surfaces amplified light-induced reactions, addressing critical challenges in environmental remediation, particularly in the degradation of persistent environmental pollutants. This study offers valuable insights, positioning Au–TiO/BC NCs as promising candidates for sustainable environmental remediation, emphasizing reusability, enhanced photocatalytic performance, and a straightforward synthesis process under both UV and direct sunlight irradiation.

中文翻译：

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轻松合成 Au-TiO2/细菌纤维素气凝胶纳米复合材料，并增强紫外照射下光催化降解亚甲基蓝的能力

成功合成了具有卓越光催化性能的 Au-TiO2/细菌纤维素气凝胶纳米复合材料（Au-TiO2/BC NCs），旨在解决废水处理中的团聚和可重复使用性挑战。金纳米粒子（Au NPs）与TiO的整合，与作为三维纳米结构的细菌纤维素（BC）相结合，通过机械复合形成了Au-TiO/BC NCs，通过各种表征技术得到了证实包括 XRD、SEM、SEM-EDS、TEM、TEM-EDS、BET、XPS、FT-IR、荧光分光光度计、拉曼和紫外可见光谱。 Au-TiO 纳米颗粒与 BC 的组合表现出对 BC 纳米结构的均匀覆盖，这归因于 BC 的独特性能，特别是其防止 TiO 团聚的表面羟基，以及 Au 纳米颗粒在 TiO 层上的均匀分布。通过在紫外线和直射阳光照射下的亚甲基蓝 (MB) 降解来评估光催化活性，结果表明 AuNP 的效率显着提高，在紫外线照射下 Au-TiO/BC NC 的降解率达到约 90%。合成的NCs表现出稳定性，但在循环测试后性能略有下降，表明在不同光照条件下废水处理应用的潜力。将 Au NP 整合到 TiO 表面放大了光诱导反应，解决了环境修复中的关键挑战，特别是在持久性环境污染物的降解方面。这项研究提供了宝贵的见解，将 Au-TiO/BC NC 定位为可持续环境修复的有希望的候选者，强调可重复使用性、增强的光催化性能以及在紫外线和直射阳光照射下的简单合成过程。