Abstract Water pollution by pathogenic bacteria is a major threat to human health, and less-than-ideal disinfection and antimicrobial strategies have been developed to address waterborne pathogens. A green light–triggered photocatalytic antimicrobial rose bengal (RB)–modified cotton fabric (CF) (RB-CF) was prepared for wastewater disinfection by covalently binding RB to a CF surface. The antimicrobial rates of RB-CF against gram-positive Staphylococcus aureus and gram-negative Escherichia coli were both greater than 99.99% due to the generation of singlet oxygen that inactivates microbes under green light irradiation. Most importantly, RB-CF exhibited high stability, negligible cytotoxicity, and no release of free RB during the photocatalytic process, which was the key to its long-term antimicrobial activity and use security. Its long-term antimicrobial activity was further verified by the repeated photocatalytic disinfection; more than 99.99% of bacteria were inactivated even after five cycles. Therefore, this work may offer a potential avenue to develop low-cost, non-toxic, and durable antimicrobial fabrics with great potential for industrial and health-care applications, including but not limited to water purification, wastewater disinfection, masks, and protective clothing.

中文翻译：

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用于废水消毒的绿光触发抗菌棉织物

摘要 病原菌造成的水污染是对人类健康的主要威胁，已经开发出不太理想的消毒和抗菌策略来解决水传播的病原体。通过将 RB 共价结合到 CF 表面，制备了一种绿光触发的光催化抗菌玫瑰红（RB）改性棉织物（CF）（RB-CF）用于废水消毒。由于在绿光照射下产生单线态氧使微生物失活，RB-CF对革兰氏阳性金黄色葡萄球菌和革兰氏阴性大肠杆菌的抗菌率均大于99.99%。最重要的是，RB-CF 表现出高稳定性、可忽略的细胞毒性，并且在光催化过程中不释放游离 RB，这是其长期抗菌活性和使用安全的关键。通过反复光催化消毒进一步验证了其长期抗菌活性；即使经过五个循环，99.99% 以上的细菌也被灭活了。因此，这项工作可能为开发低成本、无毒、耐用的抗菌织物提供一条潜在途径，在工业和医疗保健应用方面具有巨大潜力，包括但不限于水净化、废水消毒、口罩和防护服。 .