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可见光活性Fe3O4@SiO2/AgBr的合成及其杀菌性能与机理

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晋银佳, 雷立, 邓均, 陈享享, 朱跃. 可见光活性Fe3O4@SiO2/AgBr的合成及其杀菌性能与机理[J]. 环境工程学报, 2016, 10(10): 5459-5466. doi: 10.12030/j.cjee.201505164
引用本文: 晋银佳, 雷立, 邓均, 陈享享, 朱跃. 可见光活性Fe3O4@SiO2/AgBr的合成及其杀菌性能与机理[J]. 环境工程学报, 2016, 10(10): 5459-5466. doi: 10.12030/j.cjee.201505164
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JIN Yinjia, LEI Li, DENG Jun, CHEN Xiangxiang, ZHU Yue. Antibacterial capacity and mechanism of photocatalytic active Fe3O4@TiO2/AgBr[J]. Chinese Journal of Environmental Engineering, 2016, 10(10): 5459-5466. doi: 10.12030/j.cjee.201505164
Citation: JIN Yinjia, LEI Li, DENG Jun, CHEN Xiangxiang, ZHU Yue. Antibacterial capacity and mechanism of photocatalytic active Fe3O4@TiO2/AgBr[J]. Chinese Journal of Environmental Engineering, 2016, 10(10): 5459-5466. doi: 10.12030/j.cjee.201505164
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可见光活性Fe3O4@SiO2/AgBr的合成及其杀菌性能与机理

  • 1.

    华电电力科学研究院, 杭州 310030

  • 2.

    交通运输部水运科学研究院, 北京 100088

  • 3.

    北京大学环境与工程系, 教育部水沙科学重点实验室, 北京 100871

  • 4.

    东北大学资源与土木工程学院, 沈阳 110819

  • 基金项目:

    国家水体污染控制与治理科技重大专项（2010ZX07212-008）

Antibacterial capacity and mechanism of photocatalytic active Fe3O4@TiO2/AgBr

  • 1.

    Huadian Electric Power Research Institute, Hangzhou 310030, China

  • 2.

    China Waterborne Transport Research Institute, Beijing 100088, China

  • 3.

    Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University, Beijing 100871, China

  • 4.

    School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China

  • Fund Project:

  • 摘要: 研究合成了具有可见光活性的磁性纳米材料Fe3O4@SiO2/AgBr，并对合成的复合材料进行了表征。Fe3O4@SiO2/AgBr为球形，直径为15 nm，饱和磁性强度达54 emu·g-1。复合材料在可见光下具有优异的杀菌性能，初始浓度为1.5×107个·mL-1的E.coli ATCC15597（E.coli）可以在2 h内被完全灭活。复合材料在可见光下的杀菌机理主要是由于在可见光下能够产生多种活性物质，其中H2O2、O2-和e-是起主要作用的活性物质。水中的腐殖酸能够抑制复合材料的杀菌性能，但是在5 mg·L-1腐殖酸存在的条件下，复合材料的杀菌效率依然可以达到99%以上。此外，复合材料具有很好的重复利用性能，将反应时间延长到2.5 h，5个重复利用循环中的细菌均能被完全灭活。
    Abstract: Magnetic photoactive Fe3O4@SiO2/AgBr nanomaterial was fabricated and characterized. Fe3O4@SiO2/AgBr nanoparticles were spherical with diameter about 10 nm, and as high as 54 emu·g-1 of magnetic intensity was conserved. Moreover, great antibacterial property of Fe3O4@SiO2/AgBr under visible light irradiation was observed, 1.5×107 CFU·mL-1 of the model bacteria E. coli ATCC15597 (E.coli) could be completely inactivated in 2 h. Reactive species produced by Fe3O4@SiO2/AgBr under visible light irradiation were evidenced to inactivate the bacteria. H2O2, O2- and e- had great contribution to the bactericidal process, while h+ and ·OH showed little contribution to the disinfection reaction. Humic acid (HA) could inhibit the photocatalytic bactericidal capacity, but more than 99% of bacterial could be inactivated even in the presence of 5 mg·L-1 of HA. Moreover, Fe3O4@SiO2/AgBr showed great reusability, complete inactivation of bacteria could be reached in all the five consecutive reuse cycles when the reaction time was lengthened to 2.5 h.
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  • 收稿日期:  2015-07-28
  • 刊出日期:  2016-10-20

可见光活性Fe3O4@SiO2/AgBr的合成及其杀菌性能与机理

  • 1. 华电电力科学研究院, 杭州 310030
  • 2. 交通运输部水运科学研究院, 北京 100088
  • 3. 北京大学环境与工程系, 教育部水沙科学重点实验室, 北京 100871
  • 4. 东北大学资源与土木工程学院, 沈阳 110819
  • 收稿日期:  2015-07-28
基金项目:

国家水体污染控制与治理科技重大专项（2010ZX07212-008）

摘要: 研究合成了具有可见光活性的磁性纳米材料Fe3O4@SiO2/AgBr，并对合成的复合材料进行了表征。Fe3O4@SiO2/AgBr为球形，直径为15 nm，饱和磁性强度达54 emu·g-1。复合材料在可见光下具有优异的杀菌性能，初始浓度为1.5×107个·mL-1的E.coli ATCC15597（E.coli）可以在2 h内被完全灭活。复合材料在可见光下的杀菌机理主要是由于在可见光下能够产生多种活性物质，其中H2O2、O2-和e-是起主要作用的活性物质。水中的腐殖酸能够抑制复合材料的杀菌性能，但是在5 mg·L-1腐殖酸存在的条件下，复合材料的杀菌效率依然可以达到99%以上。此外，复合材料具有很好的重复利用性能，将反应时间延长到2.5 h，5个重复利用循环中的细菌均能被完全灭活。

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