光催化
生物相容性
材料科学
石墨氮化碳
环境友好型
纳米技术
个人防护装备
2019年冠状病毒病(COVID-19)
化学
催化作用
医学
生物化学
生物
生态学
疾病
病理
传染病(医学专业)
冶金
作者
Kai Liu,Qi You,Rohil Jawed,Dong Han,Miao Yu,Xianfeng Gu,Dong Junming,Christopher J. Butch,Yiqing Wang
出处
期刊:ACS applied bio materials
[American Chemical Society]
日期:2024-04-15
标识
DOI:10.1021/acsabm.3c01288
摘要
Protective masks are critical to impeding microorganism transmission but can propagate infection via pathogen buildup and face touching. To reduce this liability, we integrated electrospun photocatalytic graphitic carbon nitride (g-C3N4) nanoflakes into standard surgical masks to confer a self-sanitization capacity. By optimizing the purine/melamine precursor ratio during synthesis, we reduced the g-C3N4 band gap from 2.92 to 2.05 eV, eliciting a 4× increase in sterilizing hydrogen peroxide production under visible light. This narrower band gap enables robust photocatalytic generation of reactive oxygen species from environmental and breath humidity to swiftly eliminate accumulated microbes. Under ambient sunlight, the g-C3N4 nanocomposite mask layer achieved a 97% reduction in the bacterial viability during typical use. Because the optimized band gap also allows photocatalytic activity under shadowless lamp illumination, the self-cleaning functionality could mitigate infection risk from residual pathogens in routine hospital settings. Both g-C3N4 and polycaprolactone demonstrate favorable biocompatibility and biodegradability, making this approach preferable over current commercially available metal-based options. Given the abundance and low cost of these components, this scalable approach could expand global access to reusable self-sanitizing protective masks, serving as a sustainable public health preparedness measure against future pandemics, especially in resource-limited settings.
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