高等学校化学学报 ›› 2019, Vol. 40 ›› Issue (4): 645-651.doi: 10.7503/cjcu20180643

• 无机化学 • 上一篇    下一篇

γ-Fe2O3/Ag/TiO2的制备与抗菌性能

艾翠玲(), 吴丽娜, 张嵘嵘, 邵享文, 许俊鸽   

  1. 福州大学土木工程学院, 福州 350116
  • 收稿日期:2018-09-21 出版日期:2019-04-03 发布日期:2019-01-09
  • 作者简介:

    作者简介: 艾翠玲, 女, 博士, 副教授, 主要从事水处理理论与技术方面的研究. E-mail: aicuiling@163.com

  • 基金资助:
    国家自然科学基金(批准号: 51008080)、 福建省自然科学基金(批准号: 2015J01199 )和福州大学人才基金(批准号: XRC-1659)资助.

Synthesis and Antibacterial Performance of γ-Fe2O3/Ag/TiO2

AI Cuiling*(), WU Lina, ZHANG Rongrong, SHAO Xiangwen, XU Junge   

  1. College of Civil Engineering, Fuzhou University, Fuzhou 350116, China
  • Received:2018-09-21 Online:2019-04-03 Published:2019-01-09
  • Contact: AI Cuiling E-mail:aicuiling@163.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.51008080), the Natural Science Foundation of Fujian Province, China( No.2015J01199) and the Talent Fund of Fuzhou University, China(No.XRC-1659)

摘要:

采用两步法合成了γ-Fe2O3/Ag/TiO2复合光催化剂, 以大肠埃希氏菌(E. coli)为目标菌, 对数去除率为评价指标评价了催化剂的抗菌性能, 优化了催化剂的最佳制备参数. 通过X射线衍射、 扫描电子显微镜、 X射线光电子能谱和紫外-可见漫反射光谱等手段对催化剂进行了表征. 结果表明, 当Ti/Ag摩尔比为1:0.05, 煅烧时间为3 h, 煅烧温度为350 ℃时, γ-Fe2O3/Ag/TiO2表现出最佳抗菌活性. 复合催化剂具有介孔结构, 比表面积为89.1 m2/g; 光吸收边界达690 nm, 有良好的可见光响应能力; 磁性较强, 在水处理应用中可有效分离和重复使用. 反应条件不受光源限制, 在有/无光照下均具有良好的抗菌活性, 且太阳光辐照下对E. coli的对数去除率可达6.28.

关键词: γ-Fe2O3, Ag/TiO2, 大肠埃希氏菌, 抗菌性能

Abstract:

The photocatalyst γ-Fe2O3/Ag/TiO2 with highly visible-light response was synthesized by two-step process. The photocatalytic antibacterial performance under visible light was evaluated by the lgReduction on the E. coli. The physical and chemical properties of γ-Fe2O3/Ag/TiO2 were analyzed by means of X-ray powder diffraction(XRD), scanning electron microscopy(SEM), X-ray photoelectron spectroscopy(XPS), magnetic property measurement system(MPMS) and other characterization methods. The results indicate that the catalyst has mesoporous structure with a specific surface area of 89.1 m2/g and its absorption boundary reaches 690 nm. The catalyst exhibited excellent visible light response, remarkable antibacterial properties and strong magnetic properties, which can be effectively separated and reused in the water treatment. The optimal preparation parameters, such as the calcination temperature, the calcination time and n(Ti)/n(Ag) were determined as 350 ℃, 3 h and 1:0.05, respectively.

Key words: γ-Fe2O3, Ag/TiO2, E. coli, Antibacterial performance

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