Abstract

In this paper, non-solvent-induced phase separation and in situ deposition are applied to prepare a multifunctional Ag@AgCl-cellulose acetate/silk fibroin (Ag@AgCl-CA/SF) composite film. The CA/SF film is employed as an eco-friendly substrate that provides sites for Ag@AgCl nanoparticle (NP) in situ deposition. The films are characterized using various analytical methods. The photocatalytic activity of the films is evaluated via the decomposition of methyl orange (MO) under visible light. The results indicate that the Ag@AgCl-CA/SF film exhibits higher photocatalytic activity than the Ag-CA/SF film and that the reaction rate constant of MO decomposition photocatalyzed by Ag@AgCl-CA/SF is approximately 10.3 times that of Ag-CA/SF. Meanwhile, a possible photocatalytic mechanism over the Ag@Ag-CA/SF film is presented based on theoretical analysis and active species trapping experiments. Furthermore, films with silver atom and silver ion deposition exhibit good antibacterial activity against E. coli and S. aureus. This research may provide new insight into the construction of a multifunctional film reactor for organic pollutant degradation and bacterial inactivation.

Graphic abstract

中文翻译：

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Ag @ AgCl纳米粒子原位沉积醋酸纤维素/丝素蛋白复合膜的光催化和抗菌应用

摘要

本文采用非溶剂诱导的相分离和原位沉积技术制备了一种多功能的Ag @ AgCl-纤维素乙酸酯/丝素蛋白（Ag @ AgCl-CA / SF）复合膜。CA / SF膜用作生态友好的基材，可为Ag @ AgCl纳米颗粒（NP）原位沉积提供位置。使用各种分析方法对薄膜进行表征。通过在可见光下甲基橙（MO）的分解来评估薄膜的光催化活性。结果表明，Ag @ AgCl-CA / SF薄膜具有比Ag-CA / SF薄膜更高的光催化活性，并且Ag @ AgCl-CA / SF光催化的MO分解反应速率常数约为Ag的10.3倍。 -CA / SF。与此同时，基于理论分析和活性物种捕获实验，提出了一种在Ag @ Ag-CA / SF薄膜上的光催化机理。此外，具有银原子和银离子沉积的薄膜对细菌具有良好的抗菌活性大肠杆菌和金黄色葡萄球菌。这项研究可能为多功能膜反应器的构建提供新的见解，该反应器可降解有机污染物和使细菌灭活。

图形摘要