材料科学
光催化
光降解
纳米复合材料
罗丹明B
涂层
纳米棒
二氧化钛
可见光谱
等离子体子
纳米技术
复合材料
光电子学
催化作用
化学
生物化学
作者
Laura Marín-Caba,Gustavo Bodelón,Yoel Negrín‐Montecelo,Miguel A. Correa‐Duarte
标识
DOI:10.1002/adfm.202105807
摘要
Abstract Infections caused by microorganisms are a global public health problem that continually demands new antimicrobial strategies. The generation of reactive oxygen species (ROS) by photocatalytic materials is an attractive approach to combat microbes. Along these lines, titanium dioxide (TiO 2 ) constitutes an outstanding light‐driven ROS generator. However, the wide bandgap of this semiconductor limits its use to the ultraviolet range of the spectral region. Herein, nanostructured materials composed of TiO 2 nanoparticles and plasmonic gold nanorods (AuNRs) are presented for the photoinactivation of bacteria by means of sunlight irradiation, aiming to extend the photocatalytic action of the nanocomposite to the visible and near‐infrared ranges. It is shown that, upon simulated sunlight irradiation, the different composites as coating films show photodegradation of rhodamine B, ROS production, photocatalytic inactivation of protein function in bacterial biofilms, and strong antimicrobial activity. This approach involving AuNRs/TiO 2 photocatalytic composites may pave the way for the fabrication of visible light‐responsive surfaces with antimicrobial activity.
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