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铈负载SBA-15分子筛催化臭氧氧化水中环丙沙星

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马骕骦, 潘兆琪, 陈伟锐, 李旭凯, 李来胜. 铈负载SBA-15分子筛催化臭氧氧化水中环丙沙星[J]. 环境化学, 2016, 35(5): 910-916. doi: 10.7524/j.issn.0254-6108.2016.05.2015112308
引用本文: 马骕骦, 潘兆琪, 陈伟锐, 李旭凯, 李来胜. 铈负载SBA-15分子筛催化臭氧氧化水中环丙沙星[J]. 环境化学, 2016, 35(5): 910-916. doi: 10.7524/j.issn.0254-6108.2016.05.2015112308
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MA Sushuang, PAN Zhaoqi, CHEN Weirui, LI Xukai, LI Laisheng. Catalytic ozonation of ciprofloxacin over cerium supported on SBA-15 mesoporous molecular sieves[J]. Environmental Chemistry, 2016, 35(5): 910-916. doi: 10.7524/j.issn.0254-6108.2016.05.2015112308
Citation: MA Sushuang, PAN Zhaoqi, CHEN Weirui, LI Xukai, LI Laisheng. Catalytic ozonation of ciprofloxacin over cerium supported on SBA-15 mesoporous molecular sieves[J]. Environmental Chemistry, 2016, 35(5): 910-916. doi: 10.7524/j.issn.0254-6108.2016.05.2015112308
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铈负载SBA-15分子筛催化臭氧氧化水中环丙沙星

  • 1.

    广东省环境保护环境功能材料重点实验室, 华南师范大学化学与环境学院, 广州, 510006

  • 基金项目:

    国家高技术研究发展计划(2013AA06A305)资助.

Catalytic ozonation of ciprofloxacin over cerium supported on SBA-15 mesoporous molecular sieves

  • 1.

    Guangdong Key Laboratory of Function Materials for Environmental Protection, School of Chemistry & Environment, South China Normal University, Guangzhou, 510006, China

  • Fund Project: Supported by National High Technology Research and Development Program of China (2013AA06A305).

  • 摘要: 通过水热法合成纯硅介孔分子筛SBA-15,并采用等体积浸渍法制备Ce负载SBA-15分子筛催化剂(Ce/SBA-15),将其应用于催化臭氧氧化环丙沙星(CIP).小角X射线衍射(XRD)、透射电镜(TEM)表征结果表明,Ce/SBA-15保持了纯硅SBA-15有序的介孔结构.Ce/SBA-15催化臭氧氧化环丙沙星(CIP)结果显示,催化剂有良好的活性,对环丙沙星的矿化率为63.3%,比单独臭氧氧化高出22.9%;随着铈负载量增加,催化剂活性呈现先增大后减小趋势,负载量为2%时催化效果最佳;TOC去除率随着反应温度增加而提高;溶液初始pH对反应有显著的影响,pH=5.01时TOC去除率最大.以水杨酸作为羟基自由基(·OH)捕获剂,用比色法测定·OH产量为0.0072 mmol·L-1.溶液中投加1 mmol·L-1磷酸根时,催化臭氧氧化中TOC去除率降低了25.8%,催化效果受到明显抑制,表明·OH的生成发生在Ce/SBA-15表面.
    Abstract: Cerium-loaded SBA-15 (Ce/SBA-15) was synthesized successfully by a hydrothermal method and was used as a catalyst for the ozonation of ciprofloxacin (CIP) in aqueous solution. The catalyst was characterized by low angle X-ray diffraction (XRD) and transmission electron microscopy (TEM). Characterizations results suggested that the prepared samples retained a highly regulated mesopores of hexagonal structure. The catalytic ozonation reaction results showed that Ce/SBA-15 had good catalytic activity, through which TOC removal rate of CIP reached 63.3%, 22.9% higher than ozonation reaction alone. And the catalytic activity of the samples increased with metal loading amount from 0.5% to 2%. However, it showed a decreased trend as the metal loading amount further increased. What's more, TOC removal increased with temperature. The initial pH of the solution also had a significant effect on the reaction, and the removal rate of TOC reached the highest at pH 5.01. Salicylic acid was employed as·OH scavenger to qualify ·OH by using UV-Vis Spectroscopy. When 1 mmol·L-1 phosphate was added into the reaction solution, TOC removal was inhibited by 25.8%. The result indicted that hydroxyl radical (·OH) was be generated on the surface of Ce/SBA-15.
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  • 收稿日期:  2015-11-23
  • 刊出日期:  2016-05-15

铈负载SBA-15分子筛催化臭氧氧化水中环丙沙星

  • 1. 广东省环境保护环境功能材料重点实验室, 华南师范大学化学与环境学院, 广州, 510006
  • 收稿日期:  2015-11-23
基金项目:

国家高技术研究发展计划(2013AA06A305)资助.

摘要: 通过水热法合成纯硅介孔分子筛SBA-15,并采用等体积浸渍法制备Ce负载SBA-15分子筛催化剂(Ce/SBA-15),将其应用于催化臭氧氧化环丙沙星(CIP).小角X射线衍射(XRD)、透射电镜(TEM)表征结果表明,Ce/SBA-15保持了纯硅SBA-15有序的介孔结构.Ce/SBA-15催化臭氧氧化环丙沙星(CIP)结果显示,催化剂有良好的活性,对环丙沙星的矿化率为63.3%,比单独臭氧氧化高出22.9%;随着铈负载量增加,催化剂活性呈现先增大后减小趋势,负载量为2%时催化效果最佳;TOC去除率随着反应温度增加而提高;溶液初始pH对反应有显著的影响,pH=5.01时TOC去除率最大.以水杨酸作为羟基自由基(·OH)捕获剂,用比色法测定·OH产量为0.0072 mmol·L-1.溶液中投加1 mmol·L-1磷酸根时,催化臭氧氧化中TOC去除率降低了25.8%,催化效果受到明显抑制,表明·OH的生成发生在Ce/SBA-15表面.

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