| 中空碳球负载TiO2纳米颗粒用于增强光催化抗菌性能 |
| TiO2 nanoparticles anchored on hollow carbon spheres for enhanced photocatalytic antibacterial |
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| 摘要: 以聚吡咯包覆聚苯乙烯核壳结构衍生的中空碳球(hollow carbon spheres，HCS)为载体，乙酰丙酮钛(TOAC)为钛源，通过湿化学法和可控热解法制备了HCS负载纳米二氧化钛(HCS@TiO2)复合材料。通过粉末X射线衍射、紫外可见光谱、X射线光电子能谱、热重分析、扫描电子显微镜、透射电子显微镜、光致发光光谱和Mott-Schottky曲线对HCS@TiO2的晶态结构、微观形貌、光学性能等进行表征，并通过调控TiO2的负载量和热解温度对HCS@TiO2复合材料进行了结构优化。在模拟太阳光照射条件下，以大肠杆菌(E.coli)和金黄色葡萄球菌(S.aureus)为实验对象，研究了不同TiO2负载量的HCS@TiO2复合材料及TiO2和HCS对照样品的光催化抗菌性能，以及光照时间对抗菌性能的影响。结果表明，当TOAC与HCS质量比为15∶1、热解温度为650℃时，最优化的HCS@TiO2-15复合材料对E.coli和S.aureus的抗菌率均达到99%以上，抗菌性能显著优于TiO2和HCS。光照时间的抗菌数据表明，最佳光照时间为90 min，细菌存活率低于1%。 |
| 关键词: 中空碳球 纳米二氧化钛 大肠杆菌 金黄色葡萄球菌 抗菌性能 |
| 基金项目: 江苏省自然科学基金(No.BK20210834)资助。 |
| Abstract: TiO2 nanoparticles anchored on hollow carbon spheres (HCS) composites (HCS@TiO2) were prepared via a facile wet-chemistry and controllable pyrolysis using polystyrene@polypyrrole derived HCS as substrates and titanium oxide acetylacetone (TOAC) as Ti source, respectively. The crystalline structures, micro morphologies, and optical properties of HCS@TiO2 composites were characterized by powder X-ray diffraction, ultraviolet-visible spectra, X-ray photoelectron spectra, thermogravimetric analysis, scanning electron microscope, transmission electron microscope, photoluminescence spectra, and Mott-Schottky curves. The structural optimization of HCS@TiO2 composites was investigated by tuning the loading mass of TiO2 and pyrolysis temperatures. Antibacterial performances for E. Coli and S. aureus were evaluated by using HCS@TiO2 with different loading masses and control group (HCS and TiO2) under simulated sunlight irradiation conditions as well as different irradiation times. It was found that the optimized HCS@TiO2-15 (the mass ratio of TOAC to HCS was 15∶1, the pyrolysis temperature was 650 ℃) showed a high antibacterial efficiency (above 99%) which was far superior to that of HCS and TiO2. Moreover, the irradiation time was determined to 90 min having best antibacterial activity (the survival rate was less than 1%). |
| Keywords: hollow carbon sphere TiO2 nanoparticle E. coli S. aureus antibacterial performance |
| 投稿时间：2023-02-23 修订日期：2023-05-22 |
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| 李茂,楼婷飞,李奇.中空碳球负载TiO2纳米颗粒用于增强光催化抗菌性能[J].无机化学学报,2023,39(8):1489-1500. |
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