Chemical Industry and Engineering Progress ›› 2018, Vol. 37 ›› Issue (11): 4343-4348.DOI: 10.16085/j.issn.1000-6613.2017-2607

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Comparative study on the antibacterial properties of TiO2, ZnO and TiO2/ZnO oxide powders

ZHANG Chongmiao, WEN Yinmei, GAO Min, GAO Qian   

  1. Key Laboratory of Northwest Water Resource, Environment and Ecology, Ministry of Education, Shaanxi Key Laboratory of Environmental Engineering, School of Environment and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, Shaanxi, China
  • Received:2017-12-18 Revised:2018-03-07 Online:2018-11-05 Published:2018-11-05

TiO2、ZnO和TiO2/ZnO三种氧化物粉体材料的抗菌性能对比

张崇淼, 温银梅, 高敏, 高倩   

  1. 西安建筑科技大学环境与市政工程学院, 陕西省环境工程重点实验室, 西北水资源与环境生态教育部重点实验室, 陕西 西安 710055
  • 通讯作者: 张崇淼(1978-),男,博士,教授,博士生导师,主要从事微生物风险控制、环境功能材料的开发与应用。E-mail:zhangchongmiao@163.com。
  • 作者简介:张崇淼(1978-),男,博士,教授,博士生导师,主要从事微生物风险控制、环境功能材料的开发与应用。E-mail:zhangchongmiao@163.com。
  • 基金资助:
    国家自然科学基金项目(51578441)。

Abstract: Due to their high chemical stability and rich and easy raw material availability, oxides as antibacterial materials are receiving increasing attention. In-depth study of the antibacterial properties of oxides and the related influence factors can provide a scientific basis to explore new antibacterial materials. TiO2/ZnO composite was prepared by sol-gel method, and was compared with TiO2 and ZnO. The crystal structure, morphology and particle size of these materials were characterized. Using the Escherichia coli ATCC25922 as the tested strain, we investigated the antibacterial activities of these three oxides through bacterial inhibition zone test and bacterial suspension contact test. The effects of titanium-zinc ratio, light and other conditions on the antibacterial properties were also investigated. It was found that the TiO2 sample was mainly composed of anatase phase and rutile phase, while the ZnO sample was mainly of hexagonal wurtzite phase. And it is mainly the anatase TiO2 depositing in the pore of hexagonal wurtzite ZnO in TiO2/ZnO composite. The powder size of the three samples were in a descending order of TiO2/ZnO, TiO2 and ZnO. Both bacterial inhibition zone test and bacterial suspension contact test confirmed that the antibacterial performance of the ZnO sample was obviously better than that of the TiO2. The antibacterial performance of ZnO and TiO2/ZnO were both good under dark conditions, but became even better under visible light. The comparative analysis demonstrated that the content of ZnO in the TiO2/ZnO composite played a major role in the antibacterial effect. The calcination temperature during the preparation of TiO2/ZnO did not show significant effect on its antibacterial performance.

Key words: titanium dioxide (TiO2), zinc oxide (ZnO), TiO2/ZnO, antibacterial, powders, composites, preparation

摘要: 氧化物具有化学性质稳定、原材料丰富易得的优点,其作为抗菌材料日益受到关注。对氧化物的抗菌性能及影响因素开展深入研究,能够为新型抗菌材料的开发提供科学依据。通过溶胶-凝胶法制备出了TiO2/ZnO复合粉体,并将其与TiO2、ZnO进行对比,分别对它们的晶相结构、微观形貌和粒径进行了表征。利用大肠杆菌ATCC25922作为受试菌株,通过抑菌环试验和菌液接触试验对3种氧化物粉体材料的抗菌性能进行测试。考察了钛锌比、光照等条件对抗菌效果的影响。结果表明,所使用的TiO2主要由锐钛矿相和金红石相组成,ZnO主要为六方纤锌矿相,制备出的TiO2/ZnO则主要是锐钛矿型TiO2在六方纤锌矿型ZnO的孔隙间沉积而成,这3种粉体材料的粒径由大到小分别为TiO2/ZnO、TiO2和ZnO。从抑菌环和菌液接触试验的结果可以看出,ZnO粉体材料的抗菌效果明显优于TiO2粉体材料,ZnO和TiO2/ZnO在黑暗条件下仍有良好的抗菌性能,但在可见光照射条件下抗菌效果更佳。ZnO含量是TiO2/ZnO复合材料抗菌性能的关键因素。制备TiO2/ZnO粉体材料时的煅烧温度对其抗菌性能没有明显影响。

关键词: 二氧化钛, 氧化锌, 二氧化钛/氧化锌, 抗菌, 粉体, 复合材料, 制备

CLC Number: 

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