Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (10): 3233.doi: 10.7503/cjcu20210304

• Materials Chemistry • Previous Articles     Next Articles

Synthesis and Spectral Properties of Ag/SiO2-Al2O3 Composite Nanomaterial Based on Molecular Sieve Template

WANG Yong1,2, DONG Biao3, SUN Jiao1, DONG Delu1(), SUN Liankun1()   

  1. 1.Department of Pathopgysiology,College of Basic Medical Sciences,Jilin University,Changchun 130021,China
    2.Jilin Province People’s Hospital,Changchun 130000,China
    3.State Key Laboratory on Integrated Optoelectronics,College of Electronic Science and Engineering,Jilin University,Changchun 130012,China
  • Received:2021-04-30 Online:2021-10-10 Published:2021-10-10
  • Contact: DONG Delu,SUN Liankun E-mail:dongdl@jlu.edu.cn;sunlk@jlu.edu.cn
  • Supported by:
    the Science and Technology Development Plan of Jilin Province, China(20200901009SF);the Innovation Capability Construction Project of Jilin Province, China(2021C035?1)

Abstract:

Ag nanoparticles with SiO2-Al2O3 amorphous structure as the protective layer have important applications in the field of sterilization and catalysis. The morphology control of Ag nanoparticles is a privotal guarantee for its excellent performance, especially the synthesis of Ag nanoparticles with regular structures has always been a difficulty in this field. In this paper, the metastable structure of SiO2-Al2O3 molecular sieve was used as the template, and the ion exchange method is adopted at room temperature. The ion exchange time was adjusted to control the distribution and content of Ag in the molecular sieve. In the presence of reducing agent N(C2H53, amorphous composite structure materials with different ratios of Ag/SiO2-Al2O3 were obtained by microwave reduction reaction. The reslults of transmission electron microscopy showed that small-sized Ag nanoparticles can be distributed in the amorphous SiO2-Al2O3 matrix after different proportions of precursors were reduced by microwave method. The Ag nanoparticles showed necklace-like structure and were linked and wrapped by an amorphous SiO2-Al2O3 lamella when the proportion of silver was increased. This type of structure not only has the catalytic performance of Ag nanoparticles, but also shows good stability under the protection of the SiO2-Al2O3 lamella. It has a wide range of application prospects in the sterilization and catalysis fields.

Key words: Ag nanoparticles, SiO2-Al2O3 undefined structure, Molecular sieve, Microwave reduction

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