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首页> 外文期刊>Advanced Functional Materials >A Unique Disintegration-Reassembly Route to Mesoporous Titania Nanocrystalline Hollow Spheres with Enhanced Photocatalytic Activity
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A Unique Disintegration-Reassembly Route to Mesoporous Titania Nanocrystalline Hollow Spheres with Enhanced Photocatalytic Activity

机译：具有增强的光催化活性的介孔二氧化钛纳米晶空心球的独特崩解-重组途径

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摘要

A novel disintegration-reassembly route is reported for the synthesis of mesoporous TiO2 nanocrystalline hollow spheres with controlled crystallinity and enhanced photocatalytic activity. In this unique synthesis strategy, it is demonstrated that sol-gel-derived mesoporous TiO2 colloidal spheres can be disintegrated into discrete small nanoparticles that are uniformly embedded in the polymer (polystyrene, PS) matrix by surface-induced photocatalytic polymerization. Subsequent reassembly of these TiO2 nanoparticles can be induced by an annealing process after further coating of a resorcinol-formaldehyde (RF) resin, which forms self-supported hollow spheres of TiO2 at the PS/RF interface. The abundant phenolic groups on the RF resin serve as anchoring sites for the TiO2 nanoparticles, thus enable the reassembly of the TiO2 nanoparticles and prevent their sintering during the thermal crystallization process. This unique disintegration-reassembly process leads to the formation of self-supported TiO2 hollow spheres with relatively large surface area, high crystallinity, and superior photocatalytic activity in dye degradation under UV light irradiation.
机译：报道了一种新的崩解-重组路线，用于合成具有控制的结晶度和增强的光催化活性的介孔TiO2纳米晶空心球。在这种独特的合成策略中，证明了溶胶-凝胶衍生的介孔TiO2胶体球可以分解成离散的小纳米粒子，这些粒子通过表面诱导的光催化聚合均匀地嵌入聚合物（聚苯乙烯，PS）基质中。在进一步涂覆间苯二酚-甲醛（RF）树脂后，可通过退火工艺诱导这些TiO2纳米粒子的随后重新组装，该树脂在PS / RF界面处形成TiO2的自支撑空心球。 RF树脂上的丰富酚基充当TiO2纳米颗粒的固定位点，因此能够重新组装TiO2纳米颗粒并防止其在热结晶过程中烧结。这种独特的崩解-重组过程导致形成自支撑的TiO2中空球，该球具有较大的表面积，高结晶度，并且在紫外线照射下对染料的降解具有优异的光催化活性。

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  • 来源
    《Advanced Functional Materials》 |2018年第2期|1704208.1-1704208.8|共8页
  • 作者

    Wang Xin; Bai Licheng; Liu Hongyan; Yu Xuefeng; Yin Yadong; Gao Chuanbo;

  • 作者单位

    Frontier Inst Sci & Technol, Ctr Mat Chem, Xian 710054, Shaanxi, Peoples R China|Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710054, Shaanxi, Peoples R China|Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA|Chinese Acad Sci, Shenzhen Inst Adv Technol, Inst Biomed & Biotechnol, Shenzhen 518055, Peoples R China;

    Frontier Inst Sci & Technol, Ctr Mat Chem, Xian 710054, Shaanxi, Peoples R China|Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710054, Shaanxi, Peoples R China;

    Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA;

    Chinese Acad Sci, Shenzhen Inst Adv Technol, Inst Biomed & Biotechnol, Shenzhen 518055, Peoples R China;

    Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA;

    Frontier Inst Sci & Technol, Ctr Mat Chem, Xian 710054, Shaanxi, Peoples R China|Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710054, Shaanxi, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    disintegration; hollow spheres; photocatalysis; reassembly; titania nanoparticles;

    机译：崩解;空心球;光催化;重组;二氧化钛纳米粒子;

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