Microwave Synthesis of ZnO/Ag Nanocomposite
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owave Synthesis of ZnO/Ag Nanocomposite A. A. Sargsyana, V. V. Bagramyana, *, N. B. Knyazyana, R. K. Ovsepyanb, N. R. Agamalyanb, and G. R. Badalyanb a
Institute of General and Inorganic Chemistry after M.G. Manvelyan, NAS of Armenia, Yerevan, Armenia b Institute for Physical Research, NAS of Armenia, Ashtarak, Armenia *e-mail: [email protected] Received June 24, 2020; revised July 30, 2020; accepted August 7, 2020
Abstract—A microwave (MW) method has been developed for the preparation of a ZnO/Ag nanocomposite using methods of chemical precipitation and decomposition of thermally unstable compounds. Chemical co-deposition is a simple and efficient method in comparison with other methods of obtaining a ZnO/Ag nanocomposite. The characteristics of the synthesized product were determined by differential thermal analysis (DTA), X-ray phase analysis (XRA), and scanning electron microscopy (SEM). The studies carried out show the effectiveness of MW treatment in the production of ZnO/Ag nanocomposites. Keywords: microwave treatment, zinc oxide, silver, chemical precipitation, nanocomposite DOI: 10.3103/S1068337220040179
1. INTRODUCTION Zinc oxide (ZnO) is a promising material for the use in many fields of science and technology. It is most widely used as catalysts and chemisorbents [1, 2], as well as for creating optoelectronic and sensor devices [3, 4]. Recently, the attention of researchers has been attracted by nanocomposites based on zinc oxide nanoparticles, which have different optical, mechanical, ferroelectric, piezoelectric, pyroelectric, and important functional properties. There are various physical [5, 6] and chemical [7, 8] methods for obtaining ultrafine particles of zinc oxide. Physical methods involve intense heat or force action on the starting material and require the use of special equipment to maintain high pressures and temperatures. The chemical methods include precipitation methods, microemulsion, hydro- and solvothermal, sol-gel and thermal decomposition. Metal nanoparticles have attracted the attention of scientists because of their unique properties, which are used to develop new technologies in the field of electronics, materials science, and medicine [9–11]. In particular, silver (Ag) nanoparticles are used as a material for batteries, optical receptors, catalysts in chemical reactions, and antimicrobial agents. With the addition of silver, the antibacterial activity of ZnO can significantly increase. One of the most important properties of silver is its bactericidal and antiviral activity, which significantly increases when nanoparticles using due to a sharp increase in the surface area. A new type of composites—inorganic antibacterial materials containing Ag and ZnO—can be widely used. The task of modern chemistry and materials science is to develop new methods for obtaining materials in order to reduce energy costs and technological processes. A very promising method is microwave (MW) chemistry, which opens up new possibilities in the technology of the synthesis [12–14]. The MW processin
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