化工新型材料

化工新型材料 ›› 2025, Vol. 53 ›› Issue (12) : 258-262. DOI: 10.19817/j.cnki.issn1006-3536.2025.12.007

开发与应用

Ag/TiO₂纳米复合材料的制备及其抗菌性能研究

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Preparation and antibacterial properties of Ag/TiO₂ nanocomposite

Jiang Fengyang¹, Si Fang¹, Sun Yuanna¹, Yang Minge¹, Li Hong¹, Zhao Chuan¹, Li Liangliang¹, Cui Wei², Wang Junbo^1,3

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Received		Published
2024-11-01		2025-12-20
Issue Date	Revised Date
2025-12-17	2024-11-01

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摘要

采用溶胶-凝胶法,以TiCl₄为前驱体制备TiO₂,再将不同比例的TiO₂粉末加入银氨溶液中,分别用过氧化氢和甲醇作为还原剂制备Ag/TiO₂纳米复合材料。通过X射线衍射仪、傅里叶变换红外光谱仪和扫描电子显微镜对纳米TiO₂和Ag/TiO₂纳米复合材料进行结构和形貌表征,研究了水解条件和煅烧温度对纳米TiO₂晶型、结构和粒径的影响以及Ag/TiO₂纳米复合材料的抗菌性能。实验结果表明,随着煅烧温度的升高,TiO₂的晶型由锐钛矿相逐渐转变为金红石相,晶粒尺寸随之增大;将TiCl₄加入醇水体积比为1∶1的混合液中,并在400℃煅烧4h,所得纳米TiO₂粒径最小为25.9nm。采用过氧化氢还原剂制备的纳米Ag/TiO₂纳米复合材料抗菌性能优于甲醇还原剂制备的样品;当纳米银与TiO₂摩尔比为1∶1时,Ag/TiO₂纳米复合材料的抗菌性能最佳。

Abstract

TiO₂ was prepared by sol-gel method using TiCl₄ as raw material.Then Ag/TiO₂ nanocomposite was prepared by different proportions of TiO₂ powder and silver ammonia solution with hydrogen peroxide and methanol as reducing agents,respectively.The structure and morphology of TiO₂ powder and Ag/TiO₂ nanocomposite were investigated by X-ray diffraction (XRD),infrared spectroscopy (IR) and scanning electron microscopy (SEM).The effects of hydrolysis conditions and calcination temperature on the crystal form,structure and particle size of TiO₂ particles were studied,and the antibacterial properties of Ag/TiO₂ nanocomposite were discussed.The results showed that the crystal structure of TiO₂ transformed from anatase to rutile and the grain size increased with the calcination temperature rising.When the TiCl₄ was added into a mixed liquid of water and alcohol in a volume ratio of 1∶1 and calcined at 400℃ for 4h,the obtained nano TiO₂ exhibited the smallest particle size of 25.9nm.The Ag/TiO₂ nanocomposite prepared with hydrogen peroxide as the reducing agent demonstrated better antibacterial effect compared to the sample reduced by methanol.When the molar ratio of nano silver to TiO₂ was 1∶1,the antibacterial performance of Ag/TiO₂ nanocomposite was optimal.

关键词

Ag/TiO₂ / 纳米复合材料 / 抗菌性能

Key words

Ag/TiO₂ / nanocomposite / antibacterial properties

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Ag/TiO₂纳米复合材料的制备及其抗菌性能研究[J]. 化工新型材料, 2025, 53(12): 258-262 DOI:10.19817/j.cnki.issn1006-3536.2025.12.007

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