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Synthesis, characterization and immobilization of N-doped TiO2 catalysts by a reformed polymeric precursor method

机译：通过重整聚合物前体方法合成，表征和固定N掺杂TiO2催化剂的方法

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摘要

A novel synthetic method to prepare N-doped TiO2 catalysts was studied, by which a stable and homogeneous liquid polymeric precursor was produced, thus the catalysts can be loaded on suitable substrates, making catalysts facilely separated from waste water. The doping ratios and annealing temperatures were optimized by testing photodegradation of the products to methyl orange. To improve the Brunauer-Emmett-Teller surface areas of the catalyst, PEG was grafted to the structure of precursor polymer, by which an increase of 55% in BET surface areas and 20% in the photodegradation efficiencies was achieved. The crystalline phase was measured by X-ray diffraction and structural parameters were calculated by Xpert Highscores. FESEM and HRTEM pictures showed that the average particle size of the nitrogen doped and PEG modified catalyst reached to only 5 nm. X-ray photoelectron spectroscopy showed that nitrogen dope mode was interstitial. Using quartz fabrics as substrate, the loaded catalysts were facilely recycled and reused by 15 times without decay in photodegradation efficiency.
机译：研究了一种制备N掺杂的TiO2催化剂的新型合成方法，制备了稳定和均匀的液体聚合物前体，因此可以将催化剂装载在合适的基材上，使得催化剂与废水分离。通过将产物的光降解到甲基甲基甲基，优化了掺杂比率和退火温度。为了改善催化剂的Brunauer-Emmett-extreser表面区域，将PEG接枝到前体聚合物的结构中，通过该粘接表面区域的增加55％，实现了光降解效率的20％。通过X射线衍射测量结晶相，通过Xpert高频率计算结构参数。 FeSEM和HRTEM图片显示氮掺杂和PEG改性催化剂的平均粒度达到仅为5nm。 X射线光电子能谱显示氮涂料模式是间质性的。使用石英织物作为基材，载入的催化剂易于再循环并用15次重复使用，而不会衰减光降解效率。

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  • 来源
    《RSC Advances》 |2017年第25期|共7页
  • 作者

    Yu Han; Ye Li; Zhang Tuzi; Zhou Heng; Zhao Tong;

  • 作者单位

    Chinese Acad Sci Inst Chem Lab Adv Polymer Mat Beijing 100190 Peoples R China;

    Chinese Acad Sci Inst Chem Lab Adv Polymer Mat Beijing 100190 Peoples R China;

    Chinese Acad Sci Inst Chem Lab Adv Polymer Mat Beijing 100190 Peoples R China;

    Chinese Acad Sci Inst Chem Lab Adv Polymer Mat Beijing 100190 Peoples R China;

    Chinese Acad Sci Inst Chem Lab Adv Polymer Mat Beijing 100190 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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