Abstract

Ag–Carbon–TiO₂ composite tubes were prepared by using polystyrene/AgNO₃ composite fibers as a sacrifice template and a co-pyrolysis process. The Ag–Carbon–TiO₂ tubes were characterized by SEM, TEM, X-ray diffraction, Raman spectrum, XPS, and UV–vis spectrum. The results showed that the Ag–Carbon–TiO₂ tubes possessed uniform tubular structure with amorphous carbon, graphitic carbon, and Ag nanoparticles (AgNPs) distributing uniformly in TiO₂. The Ag–Carbon–TiO₂ tubes were confirmed high UV–vis light utilization and photocatalytic degradation efficiency to Rhodamine B due to the carbon doping, the surface plasmon resonance of AgNPs and the tubular structure, and the degradation of Rhodamine B reached 90% in 6 h. Meanwhile, they showed an excellent antibacterial effect on staphylococcus aureus, and the fatality rate of Ag–Carbon–TiO₂ tubes to staphylococcus aureus reached 99.9% in 24 h when its concentration was higher than 4 mg/ml. The co-pyrolysis process could repress the AgNPs to grow to be large particles, which could be a key for the excellent antibacterial property. The research showed a promising strategy for preparing Ag–Carbon–TiO₂ composite tubes by co-pyrolysis of PS composite electrospinning fibers, indicating their potential application in wastewater treatment and antibacterial materials.

中文翻译：

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Ag-Carbon-TiO 2复合管的合成及其抗菌和有机降解性能

摘要

通过使用聚苯乙烯/ AgNO ₃复合纤维作为牺牲模板和共热解工艺制备了Ag-Carbon-TiO ₂复合管。通过SEM，TEM，X射线衍射，拉曼光谱，XPS和UV-vis光谱对Ag-Carbon-TiO ₂管进行了表征。结果表明，Ag-Carbon-TiO ₂管具有均匀的管状结构，其中无定形碳，石墨碳和Ag纳米颗粒（AgNPs）均匀分布在TiO _2中。银－碳－TiO ₂由于碳掺杂，AgNPs的表面等离振子共振和管状结构，碳纳米管被证实具有很高的紫外可见光利用率和对罗丹明B的光催化降解效率，而罗丹明B在6小时内的降解率达到90％。同时，它们对金黄色葡萄球菌具有优异的抗菌作用，当其浓度高于4 mg / ml时，Ag-碳-TiO ₂管对金黄色葡萄球菌的致死率在24小时内达到99.9％。共热解过程可以抑制AgNPs成长为大颗粒，这可能是获得优异抗菌性能的关键。研究表明，制备Ag-Carbon-TiO _2的策略很有希望 PS复合电纺纤维的共热解复合管，表明它们在废水处理和抗菌材料中的潜在应用。