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首页> 外文期刊>Journal of Hazardous Materials >Oxygen defective titanate nanotubes induced by iron deposition for enhanced peroxymonosulfate activation and acetaminophen degradation: Mechanisms, water chemistry effects, and theoretical calculation
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Oxygen defective titanate nanotubes induced by iron deposition for enhanced peroxymonosulfate activation and acetaminophen degradation: Mechanisms, water chemistry effects, and theoretical calculation

机译:通过铁沉积诱导的氧化钛纳米管,用于增强过氧氧脲活化和乙酰胺蛋白降解:机制,水化学效应和理论计算

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摘要

The large consumption of acetaminophen (APAP) worldwide and unsatisfactory treatment efficiencies by conventional wastewater treatment processes give rise to the seeking of new technology for its effective removal. Herein, we proposed a facile one-step hydrothermal method to synthesize defective iron deposited titanate nanotubes (Fe/TNTs) for peroxymonosulfate (PMS) activation and APAP degradation. The retarded first-order reaction rate of APAP degradation by Fe/TNTs was 5.1 times higher than that of neat TNTs. Characterizations indicated iron deposition effectively induced oxygen vacancies and Ti3(+,) facilitating the electrical conductivity and PMS binding affinity of Fe/TNTs. Besides, oxygen vacancies could act as an electron mediator through PMS activation by iron. Moreover, the formation of Fe-O-Ti bond facilitated the synergistic redox coupling between Fe and Ti, further enhancing the PMS activation. SO4 center dot was the major radical, causing C-N bond cleavage and decreasing the overall toxicity. In contrast, APAP degradation by neat TNTs-PMS system mainly works through nonradical reaction. The Fe/TNTs activated PMS showed desired APAP removal under mild water chemistry conditions and good reusability. This work is expected to expand the potential application of titanate nanomaterials for PMS activation, and shed light on facile synthesis of oxygen defective materials for sulfate-radicalbased advanced oxidation processes.
机译:通过常规废水处理过程的全球乙酰氨基酚(APAP)的大量消费和不令人满意的治疗效率导致寻求其有效拆除的新技术。在此,我们提出了一种容易的一步水热法,用于合成过氧二硫酸盐(PMS)活化和Apap降解的缺陷的铁沉积的钛酸钛纳米管(Fe / TnT)。 Fe / TNT的APAP劣化的延迟的一阶反应速率比整齐TNT为高5.1倍。表征表明铁沉积有效地诱导氧空位和Ti3(+,)促进Fe / TnT的电导率和PMS结合亲和力。此外,氧空位可以通过铁的PMS活化作为电子介体。此外,Fe-O-Ti键的形成促进了Fe和Ti之间的协同氧化还原偶联,进一步增强了PMS活化。 SO4中心点是主要的自由基,导致C-N键切割并降低整体毒性。相反,整洁TNTS-PMS系统的APAP降解主要是通过非偶像反应工作。在温和的水化学条件下,Fe / TNT活性PMS显示所需的APAP去除和良好的可重用性。这项工作预计将扩大钛酸纳米材料的潜在应用,用于PMS激活,并在氧气缺陷材料的容纳合成上进行脱光,用于硫酸盐 - 自由基的先进氧化过程。

著录项

  • 来源
    《Journal of Hazardous Materials》 |2021年第15期|126180.1-126180.16|共16页
  • 作者单位

    Taiyuan Univ Sci & Technol Sch Environm Sci & Engn Taiyuan 030024 Shanxi Peoples R China;

    Peking Univ Coll Environm Sci & Engn Minist Educ Key Lab Water & Sediment Sci Beijing 100871 Peoples R China|Peking Univ State Environm Protect Key Lab All Mat Fluxes Riv Beijing 100871 Peoples R China;

    Peking Univ Coll Environm Sci & Engn Minist Educ Key Lab Water & Sediment Sci Beijing 100871 Peoples R China;

    China Univ Min & Technol Sch Resource & Geosci Xuzhou 221116 Jiangsu Peoples R China;

    Peking Univ Coll Environm Sci & Engn Minist Educ Key Lab Water & Sediment Sci Beijing 100871 Peoples R China|Peking Univ State Environm Protect Key Lab All Mat Fluxes Riv Beijing 100871 Peoples R China;

    Peking Univ Coll Environm Sci & Engn Minist Educ Key Lab Water & Sediment Sci Beijing 100871 Peoples R China|Peking Univ State Environm Protect Key Lab All Mat Fluxes Riv Beijing 100871 Peoples R China;

    Peking Univ Coll Environm Sci & Engn Minist Educ Key Lab Water & Sediment Sci Beijing 100871 Peoples R China|Peking Univ State Environm Protect Key Lab All Mat Fluxes Riv Beijing 100871 Peoples R China;

    Peking Univ Coll Environm Sci & Engn Minist Educ Key Lab Water & Sediment Sci Beijing 100871 Peoples R China|Peking Univ State Environm Protect Key Lab All Mat Fluxes Riv Beijing 100871 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

    Acetaminophen; Titanate nanotubes; Oxygen vacancies; Peroxymonosulfate; Density functional theory;

    机译:乙酰氨基酚;钛酸盐纳米管;氧空位;过氧键硫酸盐;密度函数理论;

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