Preparation method of silver-loaded molecular sieve efficient antibacterial agent by solid-solid ion exchange

Abstract

The invention relates to a preparation method of silver-loaded molecular sieve efficient antibacterial agent by a solid-solid ion exchange. The method includes steps of applying NaA molecular sieve with grain diameter of 200-300 nm as an antibacterial agent carrier, dosing and fully mixing NaA molecular sieve and ammonium salt according to n (Na+): n(NH4+)=1: 6-1:10, and reacting the mixture for 0.5-1.5 h in a high temperature stove at 150-250 DEG C; obtaining ammonium type molecular sieve after sufficiently cleaning the mixture by distilled water. The prepared ammonium type molecular sieve and silver nitrate are dosed and fixedly mixed according to n (NH4+): n(AgNO3)=1: 2-1:6, and performed with solid phase reaction in the high temperature stove for 1.5-5 hours at 330-460 DEG C; after fully washing the mixture, the silver-loaded molecular sieve efficient antibacterial agent is obtained. The silver load of the silver-loaded molecular sieve efficient antibacterial agent prepared in the invention is 28.15%-41.08% (mass ratio); the minimum inhibitory concentration is 9.38 ppm; the method improves the silver load and the antibacterial ability of the of silver-loaded molecular sieve efficient antibacterial agent.

Description

technical field [0001] The invention belongs to the technical field of preparation of antibacterial agents, and in particular relates to a method for preparing silver-loaded molecular sieve high-efficiency antibacterial agents by solid-solid ion exchange. Background technique [0002] Since entering the 21st century, environmental pollution and other issues have become the focus of attention of all countries. People's health and safety are also eroded by various viruses and bacteria anytime and anywhere, so people are paying more and more attention to a healthy lifestyle. The research results show that there are all kinds of harmful bacteria on some articles that people frequently touch in daily life, and their spread and transmission seriously threaten people's health. In recent years, events such as influenza A H1N1 and E. coli epidemics in many countries in Europe and the United States have made people realize that the struggle against bacteria and microorganisms is long...

AI Technical Summary

Problems solved by technology

It can be seen that most processes currently use liquid-phase ion exchange to prepare silver-loaded molecular sieve antibacterial agents, but this method has certain limitations, such as liquid-phase ion exchange requires a large amount of salt solution, and subsequent three-waste treatment is required; ion exchange The rate is low, the silver loading is not high, etc.

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