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首页> 外文期刊>Journal of Hazardous Materials >Construction of TiO_2 nanotube clusters on Ti mesh for immobilizing Sb-SnO_2 to boost electrocatalytic phenol degradation
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Construction of TiO_2 nanotube clusters on Ti mesh for immobilizing Sb-SnO_2 to boost electrocatalytic phenol degradation

机译：TiO_2纳米管簇在Ti网上构建固定Sb-SnO_2升压电催化酚降解

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摘要

An efficient Sb-doped SnO2 electrode featuring superior electrocatalytic characteristic and long stability was constructed by adopting clustered TiO2 nanotubes-covered Ti mesh as substrate (M-TNTs-SnO2). Compared with the electrodes prepared with mere Ti mesh or Ti plate grew with TiO2 nanotube, the M-TNTs-SnO2 exhibited higher TOC removal (99.97 %) and mineralization current efficiency (44.0 %), and longer accelerated service lifetime of 105 h for electrochemical degradation of phenol. The enhanced performance was mainly ascribed to the introduction of mutually self-supported TiO2 nanotube clusters in different orientations. Such unique structure not only favored a compact and smooth surface of catalyst layer which improved the stability of electrode by reinforcing the binding force between substrate and catalyst layer, but also increased the loading capacity for catalysts, leading to 1.5-2.2 times higher of center dot OH generation, the main active species for indirect electrochemical oxidation of phenol. Meanwhile, the transverse electron transfer from TiO2 nanotube to catalyst layer was possibly achieved to further prompt the generation of center dot OH. This study may provide a feasible option to design of efficient electrodes for electrocatalytic degradation of organic pollutants.
机译：通过采用聚簇TiO2纳米管覆盖的Ti网状物作为底物（M-TNTS-SNO2），构建了具有优异的电催化特性和长稳定性的有效的SB掺杂的SNO2电极。与仅用TiO2纳米管制备的电极相比，用TiO2纳米管成长，M-TNTS-SnO2表现出更高的TOC去除（99.97％）和矿化电流效率（44.0％），更长的加速服务寿命为105小时的电化学苯酚的降解。增强的性能主要归因于引入不同取向的相互自支撑的TiO2纳米管簇。这种独特的结构不仅有利于催化剂层的紧凑且光滑的表面，通过加强底物和催化剂层之间的结合力来提高电极的稳定性，而且增加了催化剂的负载能力，导致中心点高1.5-2.2倍哦，生成，主要活性物质是间接电化学氧化的苯酚。同时，可能达到从TiO2纳米管到催化剂层的横向电子转移，以进一步提示中央点的产生哦。本研究可以提供可行的选择，用于设计有机污染物的电催化降解的有效电极。

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  • 来源
    《Journal of Hazardous Materials》 |2020年第jul5期|122329.1-122329.10|共10页
  • 作者

    Huang Linlin; Li Da; Liu Junfeng; Yang Lisha; Dai Changchao; Ren Nanqi; Feng Yujie;

  • 作者单位

    Harbin Inst Technol Sch Environm State Key Lab Urban Water Resource & Environm Harbin 150090 Peoples R China;

    Harbin Inst Technol Shenzhen Sch Mat Sci & Engn Shenzhen 518055 Peoples R China;

    Harbin Inst Technol Sch Environm State Key Lab Urban Water Resource & Environm Harbin 150090 Peoples R China;

    Harbin Inst Technol Sch Environm State Key Lab Urban Water Resource & Environm Harbin 150090 Peoples R China;

    Harbin Inst Technol Sch Environm State Key Lab Urban Water Resource & Environm Harbin 150090 Peoples R China;

    Harbin Inst Technol Sch Environm State Key Lab Urban Water Resource & Environm Harbin 150090 Peoples R China;

    Harbin Inst Technol Sch Environm State Key Lab Urban Water Resource & Environm Harbin 150090 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

    Mesh Ti substrate; TiO2 nanotubes; Sb doped SnO2; Electrochemical oxidation of phenol; Hydroxyl radicals;

    机译：网Ti底物;TiO2纳米管;Sb掺杂SnO2;苯酚的电化学氧化;羟基自由基;

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