载银和聚己内酯固定化 Ag@TiO/polyaniline 纳米复合材料通过可见光和太阳光介导的光催化进行水消毒和内毒素降解。
Suspended and polycaprolactone immobilized Ag @TiO/polyaniline nanocomposites for water disinfection and endotoxin degradation by visible and solar light-mediated photocatalysis.
机构信息
Department of Chemical Engineering, National Institute of Technology Karnataka Surathkal, Srinivasnagar Post, Mangalore, 575025, India.
出版信息
Environ Sci Pollut Res Int. 2021 Mar;28(10):12780-12791. doi: 10.1007/s11356-020-11206-z. Epub 2020 Oct 22.
In the present study, water contaminated with Escherichia coli (E. coli) cells was photocataytically disinfected using Ag core-TiO shell/Polyaniline nanocomposite (Ag@TiO/PANI) under visible light irradiation. Ag@TiO/PANI containing 13 weight % of Ag@TiO was found to offer maximum disinfection activity. Band gap energy of Ag@TiO/PANI was found to be 2.58 eV. Ag@TiO/PANI nanocomposites were efficient in water disinfection in their suspended and immobilized form. Rate of disinfection with Ag@TiO/PANI was faster than that with Ag@TiO nanoparticles. Water containing 50 × 10 CFU/mL cells was completely disinfected within 120 min with 1 g/L Ag@TiO/PANI nanocomposite. Simultaneous disinfection and endotoxins degradation were achieved. The photocatalytic disinfection of water and endotoxin degradation using Ag@TiO/PANI nanocomposite under visible light irradiation followed second order kinetics. The nanocomposite also exhibited a good solar photocatalytic activity.
在本研究中，使用 Ag 核-TiO 壳/聚苯胺纳米复合材料（Ag@TiO/PANI）在可见光照射下对大肠杆菌（E. coli）细胞污染的水进行光催化消毒。发现含有 13wt%Ag@TiO 的 Ag@TiO/PANI 提供了最大的消毒活性。Ag@TiO/PANI 的能带隙能量为 2.58eV。Ag@TiO/PANI 纳米复合材料在悬浮和固定化形式下均能有效地对水进行消毒。Ag@TiO/PANI 的消毒速度比 Ag@TiO 纳米颗粒快。在 1g/LAg@TiO/PANI 纳米复合材料的作用下，含 50×10CFU/mL 细胞的水在 120 分钟内即可完全消毒。同时实现了消毒和内毒素降解。可见光照射下使用 Ag@TiO/PANI 纳米复合材料进行水的光催化消毒和内毒素降解遵循二级动力学。该纳米复合材料还表现出良好的太阳能光催化活性。
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