| Bi/WO3复合光催化材料的制备及其抗菌性能 |
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| 引用本文： | 肖维,张柯杰,傅炀杰,郭佳允,张轶,王齐.Bi/WO3复合光催化材料的制备及其抗菌性能[J].复合材料学报,2021,38(12):4198-4204. |
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| 作者姓名： | 肖维 张柯杰 傅炀杰 郭佳允 张轶 王齐 |
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| 作者单位： | 浙江工商大学 环境科学与工程学院，杭州 310018 |
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| 基金项目： | 浙江省自然科学基金(LR18B070001)；国家自然科学基金(21876154；21477114) |
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| 摘 要： | 以WO3为基底，五水硝酸铋(Bi(NO3)3·5H2O)为铋源，通过紫外还原法在WO3表面沉积具有表面等离子体效应(SPR)的半金属Bi0，制备了具有可见光响应的Bi/WO3复合光催化材料。以大肠杆菌(E. coli)和金黄色葡萄球菌(S. aureus)为实验对象，考察了所制备复合材料的光催化抗菌性能、结合结构和光电化学性质表征，对Bi的负载量进行了优化。研究发现:优选得到的0.6 mmol Bi/WO3能够在120 min内灭杀99%以上的细菌。进一步考察了灭菌机制，通过添加不同种类的捕获剂，结合电子顺磁共振(ESR)技术，发现羟基自由基(·OH)和超氧自由基(·O2?)是导致E. coli失活的主要活性物种。
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| 关 键 词： | 氧化钨 光催化 大肠杆菌 金黄色葡萄球菌 抗菌性能 表面等离子体效应 |
| 收稿时间： | 2020-12-30 |
Preparation of Bi/WO3 composite photocatalytic materials with antibacterial properties |
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| Affiliation: | School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China |
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| Abstract: | Bi/WO3 composite materials with visible-light-response were prepared. Semi-metal Bi0 with SPR effect was deposited on WO3 surface via UV reduction method using bismuth pentahydrate Bi(NO3)3·5H2O as bismuth source. Using E. coli and S. aureus as experimental objects, the photocatalytic antibacterial properties of the prepared composite materials were investigated, and the Bi loading amount was optimized via considering both the structure and photoelectrochemical properties. It is found that 0.6 mmol Bi/WO3 can kill more than 99% of bacteria within 120 min. The antibacterial mechanism was further investigated. By adding different kinds of capture agents and combining with electron spin resonance (ESR) technology, it is found that hydroxyl radical (·OH) and superoxide radical (·O2?) are the main active species causing E. coli deactivation. |
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