High-efficiency catalytic mesoporous silicon antibacterial material capable of disinfection at room temperature and applications thereof

Abstract

The invention provides a high-efficiency catalytic antibacterial material capable of disinfection at room temperature without the conditions of heating and illumination. The catalytic antibacterial material is composed of one or a plurality of aurum, argentum, cuprum, ferrum, magnesium and cerium loaded on a SBA-15 mesoporous silicon molecular sieve carrier, and the load quantities of the metal constituents are respectively 0.5-6% by weight. The SBA-15 is obtained by reacting a silicon source with a surfactant in a hydrochloric acid or nitric acid solution, and the active metal constituents are loaded on the SBA-15 by the incipient wetness impregnation, impregnation and cocondensation methods. The catalytic antibacterial material can be preprocessed into any shape according to different operating requirements and is coated on a central air-conditioner, a building ventilation filter system, an indoor wall, a screen window, a respirator or a protective clothing for use. The catalytic antibacterial material is also suitable for filter purification apparatus, such as filter screens, filter elements and the like, of drinking fountains, water purifiers, mineral pots and the like. When in use, the catalytic antibacterial material does not need other additional external conditions, thus having the advantages of energy saving, economy, environmental protection and high popularization value.

Description

technical field [0001] The invention belongs to the technical field of environmental catalysis, and relates to a metal-loaded mesoporous silicon antibacterial material and its catalytic oxidation removal of pathogenic microorganisms at room temperature, so as to realize the disinfection and purification of air and drinking water, and reduce the harm of diseases to human bodies . technical background [0002] Due to the existence of bacteria, viruses and other pollutants in the air and water, it brings great harm to human life. The survey of the World Health Organization shows that more than 80% of human diseases are related to indoor air pollution and water pollution, and the pathogenic microbial pollution is the main killer causing diseases. The SARS virus in 2003 and the subsequent outbreak of bird flu and the current global spread of H1N1 influenza have aroused the public's strong awareness of sterilization and disinfection of their own living environment, and promoted t...

AI Technical Summary

Problems solved by technology

Among them, the traditional chlorine gas disinfection method, which has been used for the longest time, has been shown by the latest research to easily react with organic pollutants in water to produce carcinogenic by-products such as chloroform. Ozone disinfection method is easy to oxidize bromide ions in water to bromate which is harmful to human body. In addition, the ultraviolet rays and ozone used in the disinfection process need to be prepared on site, and the equipment is complicated. The chemical disinfection method effectively destroys harmful microorganisms, and at the same time, a large amount of toxic substances remain, which is very destructive to the human body and objects.

[0004] In recent years, catalytic oxidation technology, especially semiconductor materials such as non-toxic and harmless TiO 2 The photocatalytic oxidation technology as a catalyst has become a research hotspot in air and drinking water disinfection technology, but the problem in its practical application is that in order to ensure a high catalytic activity, in addition to using TiO 2 In addition to nanopowders or thin films as photocatalysts, it is still necessary to use ultraviolet light or near ultraviolet light to excite TiO 2 The production of strong oxidative intermediates kills microorganisms, which makes this technology not only complicated in the preparation of raw materials, high in technical requirements, but also complex in overall equipment resulting in high costs, such as patents 96197457.5 and 98240831.5

These obvious deficiencies limit the large-scale popularization and application of this technology.

[0005] The research results of modern surface science and catalysis show that the use of oxide-supported nano-metal catalysts such as Ag and Au can effectively adsorb organic molecules at room temperature, and at the same time can efficiently dissociate oxygen molecules in the air to form a strong oxidation capacity. Oxygen anions used to catalyze the hydrolysis and oxidation of organisms, thereby achieving efficient adsorption and inactivation of pathogenic microorganisms [Catalysis Communications, 5(2000) 170-172, Dental Materials, 24(2008) 244-249, Carbobydrate Polymers, 78(2009) 54-59]. However, these antibacterial materials have the disadvantages of easy discoloration and a large amount of metal ions dissolved in water during the sterilization process, which limits their wide application