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首页> 外文期刊>RSC Advances >Isolated/interacting Au islands on TiO2 NTs for the switching photocatalytic/photoelectrocatalytic degradation of refractory organic pollutants in wastewater
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Isolated/interacting Au islands on TiO2 NTs for the switching photocatalytic/photoelectrocatalytic degradation of refractory organic pollutants in wastewater

机译：用于污水难治性有机污染物的TiO2 NTS孤立/互动的Au群岛在污水中耐火有机污染物的开关光催化/光电催化剂降解

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摘要

A three-dimensional surface catalyst with isolated/interacting Au islands loaded on TiO2 nanotubes (Au/TiO2 NTs) was prepared for the switching photocatalytic/photoelectrocatalytic (PC/PEC) degradation of refractory organic wastewater, and shows prominent catalytic activity and favorable stability. The Au islands act as "electronic reservoirs" for prolonging the lifetime of photo-generated electron-hole pairs. The fundamental structures and morphologies of the Au/TiO2 NTs were determined by XRD, SEM, EDS, XPS and ICP-AES, and the optical properties were estimated by UV-vis DRS and photocurrent response curves. The PC/PEC switching of the Au/TiO2 NTs was measured by the degradation of nitrobenzene solution as a refractory pollutant in water, and the results showed that the optimum Au loading for photocatalysis and photoelectrocatalysis could be easily switched to have an optimal degradation rate. We creatively proposed that the interaction between the Au nanoparticles affects the catalytic performance of the catalyst, by using isolated/interacting Au islands to regulate and enhance the PC/PEC properties of the TiO2 NTs. The synergistic effect between the nano-tubular organized TiO2 and the isolated/interacting Au islands promotes the separation and transfer of charges induced by Au plasma which was characterized by photocurrent responses, thus enabling the catalyst to have a commercial and stable photocatalysis/photoelectrocatalysis effect to a large extent.
机译：为难治性有机废水的切换光催化/光电催化剂（PC / PEC）降解，制备具有分离/相互作用的Au岛（Au / TiO 2 NTS）的三维表面催化剂，并显示出突出的催化活性和良好的稳定性。 AU岛屿充当“电子水库”，延长了光产生的电子孔对的寿命。通过XRD，SEM，EDS，XPS和ICP-AES测定Au / TiO2 NT的基本结构和形态，通过UV-VIS DRS和光电流响应曲线估计光学性质。通过硝基苯溶液作为水中耐火污染物的硝基苯溶液的降解来测量Au / TiO 2 NT的PC / PEC切换，结果表明，光催化和光电偶核分析的最佳Au负荷可以很容易地切换为具有最佳的降解速率。我们创造性地提出了Au纳米粒子之间的相互作用影响催化剂的催化性能，通过使用分离/相互作用的Au岛调节和增强TiO 2 NT的PC / PEC性质。纳米管组织的TiO2和分离/相互作用的Au岛之间的协同效应促进了Au血浆诱导的电荷的分离和转移，其特征在于光电响应，从而使催化剂具有商业和稳定的光催化/光电分配效果在很大程度上。

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  • 来源
    《RSC Advances》 |2019年第5期|共8页
  • 作者

    Zhang Dan; Wang Baohui; Wang Jiaqi; Wang Hongming; Zhang Shixu; Gu Di;

  • 作者单位

    Northeast Petr Univ Inst New Energy Chem &

    Environm Sci Coll Chem &

    Chem Engn Daqing 163318 Peoples R China;

    Northeast Petr Univ Inst New Energy Chem &

    Environm Sci Coll Chem &

    Chem Engn Daqing 163318 Peoples R China;

    Northeast Petr Univ Prov Key Lab Oil &

    Gas Chem Technol Coll Chem &

    Chem Engn Daqing 163318 Peoples R China;

    Northeast Petr Univ Prov Key Lab Oil &

    Gas Chem Technol Coll Chem &

    Chem Engn Daqing 163318 Peoples R China;

    Northeast Petr Univ Prov Key Lab Oil &

    Gas Chem Technol Coll Chem &

    Chem Engn Daqing 163318 Peoples R China;

    Northeast Petr Univ Prov Key Lab Oil &

    Gas Chem Technol Coll Chem &

    Chem Engn Daqing 163318 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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