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首页> 外文期刊>RSC Advances >Diethylenetriamine-assisted in situ synthesis of TiO2 nanoparticles on carbon nanotubes with well-defined structure and enhanced photocatalytic performance
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Diethylenetriamine-assisted in situ synthesis of TiO2 nanoparticles on carbon nanotubes with well-defined structure and enhanced photocatalytic performance

机译：二亚乙基三胺 - 辅助在碳纳米管上辅助TiO2纳米颗粒，具有明确定义的结构，增强的光催化性能

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摘要

A simple diethylenetriamine (DETA)-assisted solvothermal method is utilized for in situ synthesis of TiO2 nanoparticles on carbon nanotubes (CNTs), fabricating TiO2/CNT composites with well-defined structure and enhanced photocatalytic activity for the degradation of methylene blue (MB). It is found that the DETA plays an important role on the structure, photoelectrochemistry and catalytic performance of the TiO2/CNT composites. Particularly, the TiO2/CNT catalyst obtained in the presence of 0.02 mL DETA exhibits both a low adsorption capacity and high photodegrading activity for MB removal under the UV-light irradiation, proving the uniform and well-dispersed TiO2 particles loaded. Systematic characterization reveals the strong interaction and high electron-transfer efficiency between TiO2 and CNT in the sample with the assistance of DETA. Besides, a DETA-assisted formation mechanism of the TiO2/CNT composite has also been proposed in this study: DETA will work as a connecting bridge to facilitate the uniform adsorption of Ti4+ on the surface of CNT. With the increase of solvothermal temperature, the adsorbed Ti4+ gradually in situ crystallizes to form the TiO2/CNT composite. The DETA-assisted in situ synthesis could be expected to be a promising method for the preparation of metal oxides supported on carbon materials with well-defined structure and superior photocatalytic or photoelectrochemical properties.
机译：一个简单的二亚乙基三胺（DETA）辅助溶剂热方法是在上碳纳米管（CNT），二氧化钛制造/ CNT复合材料具有良好限定的结构和增强的光催化活性亚甲基蓝（MB）的降解TiO 2纳米颗粒的原位合成用于。据发现DETA扮演的结构，光电化学和纳米TiO2 /碳纳米管复合材料的催化性能具有重要作用。特别地，在0.02毫升DETA展品同时具有低的吸附容量和对UV光照射下MB去除高光分解活性存在下得到在TiO 2 / CNT催化剂，证明加载的均匀和良好分散的TiO 2颗粒。系统的表征揭示了与DETA的协助下在样品中的TiO2和CNT之间的强相互作用和高电子传递效率。此外，在TiO 2 / CNT复合材料的DETA辅助形成机制也已经提出在本研究：DETA将作为连接桥，以促进CNT的表面上的Ti4 +的均匀吸附。与溶剂热温度的增加，吸附的Ti4 +逐渐原位结晶从而在TiO 2 / CNT复合材料。在原位合成的DETA辅助可以预期对于负载在碳上的材料具有良好限定的结构和优良的光催化或光电化学特性的金属氧化物的制备方法有前途的。

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  • 来源
    《RSC Advances》 |2017年第79期|共9页
  • 作者

    Peng Hailong; Yang Xiaoyan; Zhang Peng; Zhang Yiming; Liu Chengwei; Liu Dan; Gui Jianzhou;

  • 作者单位

    Tianjin Polytech Univ Coll Environm &

    Chem Engn State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Shangqiu Normal Univ Sch Chem &

    Chem Engn Shangqiu 476000 Peoples R China;

    Tianjin Polytech Univ Sch Mat Sci &

    Engn Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Coll Environm &

    Chem Engn State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Coll Environm &

    Chem Engn State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Coll Environm &

    Chem Engn State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

    Tianjin Polytech Univ Coll Environm &

    Chem Engn State Key Lab Separat Membranes &

    Membrane Proc Tianjin 300387 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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