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首页> 外文期刊>Environmental Science & Technology >Ruthenium Nanoparticles Supported on CeO_2 for Catalytic Permanganate Oxidation of Butylparaben
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Ruthenium Nanoparticles Supported on CeO_2 for Catalytic Permanganate Oxidation of Butylparaben

机译：CeO_2上负载的钌纳米粒子催化对羟基苯甲酸丁酯的高锰酸盐氧化。

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摘要

This study developed a heterogeneous catalytic permanganate oxidation system with ceria supported ruthenium, Ru/CeO_2 (0.8‰ as Ru), as catalyst for the first time. The catalytic performance of Ru/ CeO_2 toward butylparaben (BP) oxidation by permanganate was strongly dependent on its dosage, pH, permanganate concentration and temperature. The presence of 1.0 g L~(-1) Ru/CeO_2 increased the oxidation rate of BP by permanganate at pH 4.0-8.0 by 3-96 times. The increase in Ru/ CeO_2 dosage led to a progressive enhancement in the oxidation rate of BP by permanganate at neutral pH. The XANES analysis revealed that (1) Ru was deposited on the surface of CeO_2 as Ru~Ⅲ; (2) Ru~Ⅲ was oxidized by permanganate to its higher oxidation state Ru and Ru , which acted as the co-oxidants in BP oxidation; (3) Ru~Ⅵ and RuⅦ were reduced by BP to its initial state of Ru~Ⅲ. Therefore, Ru/CeO_2 acted as an electron shuttle in catalytic permanganate oxidation process. LC-MS/MS analysis implied that BP was initially attacked by permanganate or Ru~Ⅵ and Ru~Ⅵ at the aromatic ring, leading to the formation of various hydroxyl-substituted and ring-opening products. Ru/CeO_2 could maintain its catalytic activity during the six successive runs. In conclusion, catalyzing permanganate oxidation with Ru/CeO_2 is a promising technology for degrading phenolic pollutants in water treatment.
机译：本研究首次开发了以二氧化铈负载的钌Ru / CeO_2（Ru为0.8‰）为催化剂的非均相高锰酸盐氧化体系。 Ru / CeO_2对高锰酸盐对羟基苯甲酸丁酯（BP）氧化的催化性能在很大程度上取决于其剂量，pH，高锰酸盐浓度和温度。 1.0 g L〜（-1）Ru / CeO_2的存在使高锰酸盐在pH 4.0-8.0下的BP氧化速率提高了3-96倍。 Ru / CeO_2剂量的增加导致中性pH下高锰酸盐对BP氧化速率的逐渐提高。 XANES分析表明：（1）Ru以Ru〜Ⅲ的形式沉积在CeO_2表面； （2）Ru〜Ⅲ被高锰酸盐氧化为较高的氧化态Ru和Ru，在BP氧化中起助氧化剂的作用。 （3）BP将Ru〜Ⅵ和RuⅦ还原为Ru〜Ⅲ的初始状态。因此，Ru / CeO_2在高锰酸盐催化氧化过程中起电子穿梭的作用。 LC-MS / MS分析表明，BP最初在芳环上受到高锰酸盐或Ru〜Ⅵ和Ru〜Ⅵ的攻击，导致形成各种羟基取代的和开环的产物。 Ru / CeO_2可以在六个连续的运行过程中保持其催化活性。总之，用Ru / CeO_2催化高锰酸盐氧化是降解水处理中酚类污染物的有前途的技术。

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  • 来源
    《Environmental Science & Technology》 |2013年第22期|13011-13019|共9页
  • 作者

    Jing Zhang; Bo Sun; Xiaohong Guan; Hui Wang; Hongliang Bao; Yuying Huang; Junlian Qiao; Gongming Zhou;

  • 作者单位

    State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 200092 Shanghai, P. R. China,State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, 150090 Harbin, P. R China;

    State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, 150090 Harbin, P. R China;

    State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 200092 Shanghai, P. R. China,State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, 150090 Harbin, P. R China;

    Waters Co., 200000 Shanghai, China;

    Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 201204 Shanghai, P. R. China;

    Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, 201204 Shanghai, P. R. China;

    State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 200092 Shanghai, P. R. China;

    State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 200092 Shanghai, P. R. China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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