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首页> 外文期刊>Journal of Hazardous Materials >Accelerated photoelectron transmission by carboxymethyl β-cyclodextrin for organic contaminants removal: An alternative to noble metal catalyst
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Accelerated photoelectron transmission by carboxymethyl β-cyclodextrin for organic contaminants removal: An alternative to noble metal catalyst

机译：通过羧甲基β-环糊精进行加速光电子传递，用于除去有机污染物：贵金属催化剂的替代方案

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摘要

Applications of noble metal decorated photocatalytic nanomaterials are restricted by its high cost. In this study, carboxymethyl beta-cyclodextrin (CM-beta-CD), as an alternative to gold nanoparticle, was used to modified titanium dioxide (CM-beta-CD-P25) to accelerate photoelectron transmission and enhance the organic contaminants removal from water. Several of emerging organic contaminants, such as bisphenol A (BPA), phenol and sulphanilamide (SA), were used to evaluate their photocatalytic activities. Carboxymethyl-beta-cyclodextrin not only provide hydrophobic sites to entrap organic contaminants but also provide a "bridge" for accelerated transmission of photogenerated charges without introducing the recombination interface. Consequently, 91.6 % of BPA, 71.9 % of phenol and 97.1 % of SA could be removed by CM-beta-CD-P25(2:1) under 1 h UV light irradiation. The photooxidation rate constant of BPA, phenol and SA by CM-beta-CD-P25(2:1) were 0.039 min(-1), 0.021 min(-1) and 0.062 min(-1), respectively, which are much higher than that of pristine P25 and Au-P25. Moreover, the photocatalytic activity of CM-beta-CD-P25(2:1) remains almost unchanged in repeated cycle test owing to its high stability. The reasonable mechanism of CM-beta-CD-P25 were investigated. CM-beta-CD-P25 hybrid nanoparticles completely surpasses Au-P25 in organic contaminants removal, and shows great potential to replace noble metal as mediator.
机译：贵金属装饰光催化纳米材料的应用受其高成本的限制。在该研究中，用羧甲基β-环糊精（CM-BETA-CD）作为金纳米颗粒的替代方法，用于改性二氧化钛（CM-BETA-CD-P25）以加速光电子传递，并增强从水中去除的有机污染物。新出现的有机污染物，例如双酚A（BPA），苯酚和磺酰胺（SA），用于评估其光催化活性。羧甲基 - β-环糊精不仅提供疏水位点以诱捕有机污染物，而且还提供了用于加速光发性电荷的“桥梁”而不引入重组界面。因此，在1小时紫外光照射下可以通过CM-Beta-CD-P25（2：1）除去91.6％的BPA，71.9％的苯酚和97.1％的SA。 BPA，苯酚和SA通过CM-Beta-CD-P25（2：1）的光氧化速率常数分别为0.039 min（-1），0.021 min（-1）和0.062分钟（-1），这很多高于原始P25和AU-P25的高于。此外，由于其高稳定性，CM-β-CD-P25（2：1）的光催化活性在重复循环试验中几乎不变。研究了CM-Beta-CD-P25的合理机制。 CM-Beta-CD-P25杂交纳米颗粒完全超过有机污染物的Au-P25去除，并且表现出替代贵金属作为介体的潜力。

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  • 来源
    《Journal of Hazardous Materials》 |2020年第jul5期|122414.1-122414.10|共10页
  • 作者

    Zhou Yi; Liu Qiming; Lu Jian; He Jie; Liu Yongdi; Zhou Yanbo;

  • 作者单位

    East China Univ Sci & Technol State Environm Protect Key Lab Environm Risk Asse 130 Meilong Rd Shanghai 200237 Peoples R China|Shanghai Inst Pollut Control & Ecol Secur 1515 Zhongshan Second North Rd Shanghai 200092 Peoples R China;

    East China Univ Sci & Technol State Environm Protect Key Lab Environm Risk Asse 130 Meilong Rd Shanghai 200237 Peoples R China;

    East China Univ Sci & Technol State Environm Protect Key Lab Environm Risk Asse 130 Meilong Rd Shanghai 200237 Peoples R China;

    East China Univ Sci & Technol State Environm Protect Key Lab Environm Risk Asse 130 Meilong Rd Shanghai 200237 Peoples R China;

    East China Univ Sci & Technol State Environm Protect Key Lab Environm Risk Asse 130 Meilong Rd Shanghai 200237 Peoples R China;

    East China Univ Sci & Technol State Environm Protect Key Lab Environm Risk Asse 130 Meilong Rd Shanghai 200237 Peoples R China|Shanghai Inst Pollut Control & Ecol Secur 1515 Zhongshan Second North Rd Shanghai 200092 Peoples 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bisphenol A; Sulfanilamide; Photocatalysis; Cyclodextrin; TiO2;

    机译：双酚A;磺胺胺;光催化;环糊精;TiO2;

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