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    魏声培, 安娅, 秦好丽. 水杨酸分子印迹掺氮TiO2粉末的制备及在可见光下的选择性光催化研究[J]. 华南农业大学学报, 2016, 37(4): 134-140. DOI: 10.7671/j.issn.1001-411X.2016.04.022
    引用本文: 魏声培, 安娅, 秦好丽. 水杨酸分子印迹掺氮TiO2粉末的制备及在可见光下的选择性光催化研究[J]. 华南农业大学学报, 2016, 37(4): 134-140. DOI: 10.7671/j.issn.1001-411X.2016.04.022
    shu
    WEI Shengpei, AN Ya, QIN Haoli. Preparation of salicylic acid molecularly imprinted and N-doped TiO2 powders and their selective photocatalytic activity under visible light[J]. Journal of South China Agricultural University, 2016, 37(4): 134-140. DOI: 10.7671/j.issn.1001-411X.2016.04.022
    Citation: WEI Shengpei, AN Ya, QIN Haoli. Preparation of salicylic acid molecularly imprinted and N-doped TiO2 powders and their selective photocatalytic activity under visible light[J]. Journal of South China Agricultural University, 2016, 37(4): 134-140. DOI: 10.7671/j.issn.1001-411X.2016.04.022
    shu

    水杨酸分子印迹掺氮TiO2粉末的制备及在可见光下的选择性光催化研究

    Preparation of salicylic acid molecularly imprinted and N-doped TiO2 powders and their selective photocatalytic activity under visible light

      摘要
    • 摘要:
      目的 改善TiO2在可见光下对污染物的选择性降解能力。
      方法 采用改进的分子印迹溶胶-凝胶技术，以尿素、水杨酸分别为氮源和模板分子，制备水杨酸分子印迹掺氮TiO2粉末。通过X射线衍射(XRD)、透射电镜(TEM)、紫外-可见光漫反射吸收光谱(UV-Vis DRS)和低温N2物理吸附-脱附(BET)等技术对制备样品进行表征。
      结果 样品均为锐钛矿相，氮掺杂致使TiO2光吸收带边红移，分子印迹使TiO2具有了更为发达的孔结构和孔型，掺杂和分子印迹均有效地增大了比表面积。可见光下，与催化降解苯甲酸及甲基橙相比，分子印迹掺氮TiO2对水杨酸的选择性降解率较高，达96.0%。
      结论 水杨酸分子印迹和氮掺杂有效地改善了TiO2的选择性和可见光活性。

       

      Abstract:
      Objective To improve selective degradation ability of catalyst (TiO2)under visible light.
      Method Salicylic acid molecularly imprinted and N-doped TiO2 powders were synthesized by an improved molecularly imprinted sol-gel technique using urea as a nitrogen (N) source and salicylic acid as a template molecule. The samples were characterized by XRD, TEM, UV-Vis diffuse reflectance spectrophotometer and N2 adsorption-desorption.
      Result All samples were anatase.The red-shift of absorption band was caused by doping nitrogen to TiO2. The better-developed pore structure and pass were due to molecular imprinting technique, and the enlarged specific surface area was generated by N-doping and molecularly imprinting. Compared to benzoic acid and methyl orange, TiO2 selective photodegradation rate of salicylic acid (96.0%) was higher under visible light using molecularly imprinting and N-doping.
      Conclusion The selectivity and visible-light photoactivity of TiO2 can be effectively improved using salicylic acid molecularly imprinting and N-doping.

       

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