期刊
ACS APPLIED BIO MATERIALS
卷 3, 期 4, 页码 2255-2262出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsabm.0c00061
关键词
graphitic carbon nitride; antibacterial surface; electrophoresis deposition; nanotopography; bactericidal activity
资金
- National Natural Science Foundation of China [NSFC 31600771, 51972017]
- Fundamental Research Funds for the Central Universities of China [2019JBM409, 2019JBM326]
- National Key Research and Development Project [2017YFC0805900]
- Beijing Training Program of Innovation and Entrepreneurship for Undergraduates [202010004102]
With the rise of bacterial infections and antimicrobial resistance, it is important to develop environmentally friendly functional materials and surfaces with efficient bactericidal activity. In this work, nanostructured graphitic carbon nitride (g-C3N4) surfaces were fabricated by electrophoresis deposition of mesoporous g-C3N4 materials. Efficient bactericidal performance was achieved through the synergistic biophysical interaction of bacterial cells with the nanotopographies and visible light active photocatalytic properties. The nanotopographies of g-C3N4 surfaces demonstrated a contact-killing efficiency of >90% against Pseudomonas aeruginosa and >80% against Staphylococcus aureus cells. The number of surviving bacteria on the surfaces further decreased remarkably upon illumination using visible light generated by a light-emitting diode lamp with an irradiation intensity of 12.4 mW cm(-2). In total, the number of viable bacteria was reduced by approximately 3 orders of magnitude for P. aeruginosa and 2 orders of magnitude for S. aureus. Our experimental findings provide potential prospects for developing highly efficient photocatalytic bactericidal surfaces.
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