摘要
The combination of solar disinfection and photocatalysis technology presents a viable solution for eliminating harmful pathogenic microorganisms from water.However,some photocatalysts(e.g.,zinc oxide-based composites)are susceptible to pH-dependent dissolution in water,which can result in the loss of photocatalysts and additional environ-mental pollution.To obtain zinc oxide-based composites with low dissolution and high antibacterial efficiency for pho-tocatalytic water disinfection,we prepared MoS_(2)/ZnO@CS composites via a precipitation method to encapsulate chitosan(CS)around MoS_(2)/ZnO.The amino groups in the CS molecules act as storerooms for hydrogen ions,which inhibits the dissolution of zinc oxide.In addition,the MoS_(2)/ZnO@CS composites exhibit high production of reactive oxygen species(ROS)and broad-spectrum antibacterial activity under simulated solar irradiation(0.1 W·cm^(-2)).This makes it an excellent antibacterial agent for solar disinfection in water treatment.
太阳能消毒与光催化技术的结合为消除水体中的有害病原微生物提供了一种可行的解决方案。然而,一些光催化剂(如ZnO基复合材料)在水体中容易发生pH依赖性的溶解,这可能导致光催化剂的损失并造成额外的环境污染。为了获得低溶解性和高抗菌性的ZnO基复合材料以用于光催化水体消毒,本文采用沉淀法将壳聚糖(CS)包覆在MoS_(2)/ZnO周围,制备了MoS_(2)/ZnO@CS复合材料。CS分子中的氨基作为H+的储存库,抑制了ZnO的溶解。此外,MoS_(2)/ZnO@CS复合材料在模拟太阳光辐照(0.1 W·cm^(-2))下表现出较高的活性氧产量和广谱的抗菌活性,这使它能够成为一种优良的抗菌剂,应用于太阳能水体消毒。
作者
Yutao Xie
Yunpeng Yu
Feng Gao
谢宇涛;于云鹏;高峰(中国科学技术大学合肥微尺度物质科学国家研究中心,安徽合肥230026;中国科学技术大学中国科学院软物质化学重点实验室,安徽合肥230026;中国科学技术大学化学与材料科学学院,安徽合肥230026)
基金
supported in part by the National Natural Science Foundation of China(12174366)
Fundamental Re-search Funds for the Central Universities(WK3450000005)
the Anhui Provincial Natural Science Foundation(2108085MC93).
