氧化锌纳米复合抗菌材料的制备及性能研究

doi:10.3969/j.issn.2097-2806.2023.09.008

摘要/Abstract

摘要：

氧化锌作为一种光催化抗菌材料，因成本低和安全性较高而备受关注。本文通过超声-煅烧法制备了一系列掺杂不同TiO₂摩尔分数（0%，5%，10%，15%，20%）的TiO₂-ZnO复合抗菌材料，研究了该复合抗菌材料的晶格结构、微观形貌和光谱性能，并以ATCC 25922大肠杆菌为受试菌株，分析了TiO₂-ZnO的抗菌性能和反应过程。结果表明：TiO₂-ZnO复合材料是由六方纤锌矿ZnO和锐钛矿型TiO₂组成，TiO₂的添加生成了Zn-O-Ti新键，TiO₂颗粒连续均匀地分布在ZnO表面，ZnO的尺寸为2~3 μm。测试大肠杆菌培养12 h的菌落情况，表明了纯ZnO的抗菌能力较弱，随着TiO₂添加量的增加，菌落数量减少，TiO₂-ZnO的抗菌能力逐渐提高，TiO₂-ZnO （TiO₂掺杂摩尔分数15%）复合抗菌材料的抗菌能力最强。光催化反应下，15 min时TiO₂-ZnO的灭菌效率达到100%，TiO₂-ZnO在光照下快速破坏了大肠杆菌的细胞膜，使大肠杆菌发生严重变形，细胞质流出，进而杀死细菌，TiO₂的添加对ZnO抗菌材料的灭菌能力提升显著。

关键词: 氧化锌, 二氧化钛, 复合材料, 抗菌性能, 光催化, 大肠杆菌

Abstract:

Zinc oxide, as a photocatalytic antibacterial material, has attracted much attention due to its low cost and high safety. In this paper, a series of TiO₂-ZnO composite antibacterial materials with different TiO₂ mole doping （0%, 5%, 10%, 15%, 20%） were prepared by ultrasonic calcination method. The results show that TiO₂-ZnO composite is composed of hexagonal wurtzite ZnO and anatase TiO₂. The addition of TiO₂ generates new Zn-O-Ti bonds. TiO₂ particles are continuously and evenly distributed on the surface of ZnO, and the size of ZnO is 2-3 μm. The colony of Escherichia coli （E. coli） cultured for 12 h shows that the antibacterial ability of pure ZnO is weak. With the increase of TiO₂ addition, the number of colonies decreases, and the antibacterial ability of TiO₂-ZnO gradually increases. The antibacterial ability of TiO₂ ZnO composite antibacterial material with TiO₂ doping mole ratio of 15% is the strongest. Under the photocatalytic reaction, the sterilization efficiency of TiO₂-ZnO doped with 15% mole ratio of TiO₂ reaches 100% in 15 min. TiO₂-ZnO rapidly destroy the cell membrane of Escherichia coli under the light, causing serious deformation of Escherichia coli and the outflow of cytoplasm, thus killing bacteria. The addition of TiO₂ significantly improves the sterilization ability of ZnO antibacterial materials.

Key words: ZnO, TiO₂, compound material, antibacterial performance, photocatalysis, Escherichia coli

中图分类号:

O643.32

常香玲, 柴菲. 氧化锌纳米复合抗菌材料的制备及性能研究[J]. 日用化学工业（中英文）, 2023, 53(9): 1051-1056.

Chang Xiangling, Chai Fei. Preparation and performance study of zinc oxide nanocomposite antibacterial materials[J]. China Surfactant Detergent & Cosmetics, 2023, 53(9): 1051-1056.

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