Zhou Huang, He Feng-Jiao
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
J Nanosci Nanotechnol. 2021 Nov 1;21(11):5486-5492. doi: 10.1166/jnn.2021.19463.
As everyone knows, bacterial infectious diseases are serious hazards to human health in the world. Despite performing many methods towards the bacterial pollution, containing many detection and sterilization techniques, there is still a lack of effective means. Herein, a novel copper modified titanium (Cu@TiO₂) nanocomposites were resoundingly synthesized via the well-known sol-gel process, which revealed a significant antibacterial activity under the illumination of sunlight. The XRD, Raman spectroscopy and TEM images showed that the Cu@TiO₂ nanocomposites with a globular shape are anatase phase, Moreover, low temperature physical adsorption test and UV- visible spectrum indicate Cu @TiO₂ owns a supernal specific area (80 m²/g) and the high visible light absorbing ability. Furthermore, the novel Cu@TiO₂ nanocomposites showed an unprecedented photocatalytic capacity towards bacteria. Cu@TiO₂ nanocomposites can kill almost 98.7% under 60 min simulated solar light irradiation than that of TiO ₂(31.3 %). This study suggests that the Cu@TiO₂ will be as a potential material for ameliorating antibiotic-resistant bacteria in food detection.
众所周知，细菌感染性疾病是全球范围内对人类健康的严重威胁。尽管针对细菌污染采取了多种方法，包括许多检测和灭菌技术，但仍然缺乏有效的手段。在此，通过著名的溶胶-凝胶法成功合成了一种新型的铜修饰钛（Cu@TiO₂）纳米复合材料，该复合材料在阳光照射下显示出显著的抗菌活性。XRD、拉曼光谱和TEM图像表明，球状的Cu@TiO₂纳米复合材料为锐钛矿相。此外，低温物理吸附试验和紫外可见光谱表明Cu@TiO₂具有较高的比表面积（80 m²/g）和高可见光吸收能力。此外，新型的Cu@TiO₂纳米复合材料对细菌表现出前所未有的光催化能力。在60分钟模拟太阳光照射下，Cu@TiO₂纳米复合材料能杀灭近98.7%的细菌，而TiO₂仅能杀灭31.3%。本研究表明，Cu@TiO₂将作为一种潜在材料用于改善食品检测中的耐抗生素细菌问题。
