高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (11): 2550-2555.doi: 10.7503/cjcu20180433

• 高分子化学 • 上一篇    下一篇

二氧化硅中空微球的制备及结构调控

孟庆男(), 王凯, 汤玉斐, 赵康   

  1. 西安理工大学材料科学与工程学院, 西安 710048
  • 收稿日期:2018-06-13 出版日期:2018-11-10 发布日期:2018-09-22
  • 作者简介:联系人简介: 孟庆男, 男, 博士, 讲师, 主要从事核壳、 中空材料及无机有机复合材料方面的研究. E-mail: mengqn@xaut.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 51502241)资助.

Facile Synthesis of Hollow Silica Particles and Fine Tuning Their Structures

MENG Qingnan*(), WANG Kai, TANG Yufei, ZHAO Kang   

  1. School of Material Science & Engineering, Xi'an University of Technology, Xi'an 710048, China
  • Received:2018-06-13 Online:2018-11-10 Published:2018-09-22
  • Contact: MENG Qingnan E-mail:mengqn@xaut.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.51502241).

摘要:

在Stöber法制备间苯二酚甲醛树脂(RF)微球的过程中, 向体系中添加柠檬酸可以促进微球长大. 以RF微球为模板, 并结合酸洗除模板的方法, 制备了一系列表面具有树莓状结构的中空二氧化硅微球(h-SiO2); 固定柠檬酸的浓度, 同时向体系中添加三氯化铁, 所得h-SiO2的尺寸随着三氯化铁加入量的增加而减小, 且微球表面逐渐变得光滑. 对比实验结果表明, 三氯化铁的加入有助于RF模板的去除, 有利于制备具有高比表面积的产物. 采用这种方法还可以制备金纳米粒子负载的中空二氧化硅微球(Au@h-SiO2), 在硼氢化钠还原亚甲基蓝的反应中显示出良好的催化活性.

关键词: 酚醛树脂, 二氧化硅, 中空微球, 结构调控, 模板法

Abstract:

First, by adjusting the dosages of citric acid, resorcinol formaldehyde resin(RF) particles with different sizes were prepared. Then, hollow silica particles(h-SiO2) with raspberry-like morphologies were synthesized using the RF particles as acid-dissolvable templates. If the citric acid concentration was fixed, smaller h-SiO2 with smoother surface were produced as more FeCl3 was added. In addition, the Fe ions also facilitated the removal of the RF templates, leading to formation of the h-SiO2 with larger surface areas. Along this way, Au nanoparticles loaded h-SiO2(Au@h-SiO2) had also been produced, which showed good catalytic performance in MB reduction. Therefore, a facile and flexible method was provided here to construct the h-SiO2 with different structures, which may find potential applications in many fields.

Key words: Resorcinol-formaldehyde resin, Silica, Hollow particle, Structure control, Template synthesis

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