高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (3): 503.doi: 10.7503/cjcu20160807

• 高分子化学 • 上一篇    

Au@SiO2中空微球的制备及催化性能

孟庆男1(), 王凯1, 汤玉斐1, 赵康1, 相思源2, 张恺2, 赵朗3   

  1. 1. 西安理工大学材料科学与工程学院, 西安 710048
    2. 吉林大学化学学院, 超分子结构与材料国家重点实验室, 长春 130012
    3. 中国科学院长春应用化学研究所, 稀土资源利用国家重点实验室, 长春 130022
  • 收稿日期:2016-11-21 出版日期:2017-03-10 发布日期:2017-02-22
  • 作者简介:联系人简介: 孟庆男, 男, 讲师, 主要从事核壳及中空材料方面的研究. E-mail: mengqn@xaut.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 51502241)、 陕西省教育厅自然科学专项项目(批准号: 15JK1520)和稀土资源利用国家重点实验室开放课题基金(批准号: RERU2015014)资助.

Preparation of Gold Nanoparticles Loaded Hollow Silica Spheres and Their Catalytic Performance

MENG Qingnan1,*(), WANG Kai1, TANG Yufei1, ZHAO Kang1, XIANG Siyuan2, ZHANG Kai2, ZHAO Lang3   

  1. 1. School of Material Science and Engineering, Xi’an University of Technology, Xi’an 710048, China;
    2. State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
    3. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2016-11-21 Online:2017-03-10 Published:2017-02-22
  • Contact: MENG Qingnan E-mail:mengqn@xaut.edu.cn
  • Supported by:
    † Supported by the National Natural Science Fundation of China(No.51502241), the Scientific Research Program Funded by Shaanxi Provincial Education Department, China(No.15JK1520) and the Fund of State Key Laboratory of Rare Earth Resource Utilization, China(No.RERU2015014).

摘要:

以天然高分子阿拉伯树胶(AG)为还原剂和稳定剂制备了金纳米粒子; 将含有金纳米粒子(Au NPs)、 阿拉伯树胶和氨水的溶液滴加到乙醇中形成AG-Au NPs复合胶团; 利用正硅酸乙酯水解, 在AG-Au NPs表面包覆二氧化硅壳层; 通过简单水洗的方法得到了金纳米粒子@二氧化硅(Au@SiO2)中空微球. 采用透射电子显微镜(TEM)、 X射线衍射仪(XRD)和氮气吸附实验等对Au@SiO2中空微球进行表征. 通过设计对比实验, 证实阿拉伯树胶在中空结构形成过程中起到模板剂的作用. 催化性能测试结果表明, 所制备的Au@SiO2中空微球在硼氢化钠还原亚甲基蓝的反应中表现出良好的催化活性和重复使用性.

关键词: 金纳米粒子, 二氧化硅, 中空微球, 阿拉伯树胶, 催化性能

Abstract:

A natural polymer of Arabic gum was chosen as the reducing and stabilizing agent to synthesize Au nanoparticles. The Arabic gum and Au nanoparticles(AG-Au) hybrid colloids were obtained by dropping the mixture of the Au nanoparticles, Arabic gum molecules and ammonia solution into ethanol. Tetraethyl orthosilicate(TEOS) was added into the system to form a silica layer on the as-prepared AG-Au hybrid colloids. Finally, the Au loaded silica(Au@SiO2) hollow particles were produced by simply water washing. For the Au@SiO2 hollow particles characterization, transmission electron microscope(TEM), X-ray diffraction(XRD) and N2 adsorption-desorption measurement were conducted. The Arabic gum serves as the templating agent during the formation process of the Au@SiO2 hollow particles, which has been proved by control experiments. The as-prepared Au@SiO2 hollow particles show good performance and stability in the catalytic reaction of reduction of methylene blue(MB) with NaBH4.

Key words: Gold nanoparticles, Silica, Hollow sphere, Arabic gum, Catalysis performance(

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