General knowledge of coating: understanding of Nano-TiO2 / Diatomite Composite Photocatalytic Materials

Core tip: nano-TiO2 / diatomite composite photocatalysis material is the result of Jilin Province Linjiang meishiden powder material Co., Ltd working together with the senior scientific research team led by Professor Zheng Shuilin (doctoral supervisor) of China University of mining and Technology (Beijing) with the high-quality diatomite mineral resources of Linjiang After the purification of diatomite, experts successfully loaded anatase nano-TiO2 with high photocatalytic activity into the surface and pore of diatomite by hydrolysis precipitation method The nano-TiO2 and porous micro diatomite are organically combined to obtain Application scope and advantages of roller ceramic coating Recommended introduction: the surface of ceramic rubber plate used for roller ceramic coating is cast into durable rubber plate by hundreds of independent small ceramic pieces Each ceramic piece has raised characteristics Under general conveyor belt pressure, thousands of unique cast bumps can produce positive traction, prevent slipping and extend the service life of conveyor belt roller At the same time, the bottom layer adopts high-quality rubber, which has strong elasticity and can play a good impact resistance role The scope of application of roller ceramic coating is one three six 83857180 (the same as V) 1 Roller coating in extremely harsh working environment 2 The belt joint is not suitable for fixing with iron buckle; 3 It is suitable for leather Home of coatings news: nano TiO2 / diatomite composite photocatalysis material is the result of Jilin Linjiang meishiden powder material Co., Ltd cooperating with the senior scientific research team led by Professor Zheng Shuilin (doctoral supervisor) of China University of mining and Technology (Beijing) with the high-quality diatomite mineral resources of Linjiang After the purification of diatomite, experts successfully loaded anatase nano-TiO2 with high photocatalytic activity into the surface and pore of diatomite by hydrolysis precipitation method The nano-TiO2 / diatomite composite photocatalysis material with excellent performance, which can effectively degrade organic pollutants, was obtained by combining nano-TiO2 and porous micro diatomite After diatomite is loaded with anatase nano TiO2 photocatalyst, the photocatalyst can play its role better On the one hand, diatomite can effectively adsorb pollutants on the surface and micropores of Nano-TiO2 / Diatomite Composite Photocatalytic Materials; on the other hand, anatase TiO2 catalyst can also more effectively degrade the organic pollutants adsorbed on porous diatomite Therefore, the nano-TiO2 / diatomite composite photocatalysis material has the characteristics of adsorption, photocatalysis, microbial degradation and so on The results show that nano TiO2/ diatomite composite photocatalyst material has a porous core shell structure with diatom as the core and nano TiO2 as the shell, which has a high specific surface area and good light permeability; the core shell is closely combined, the thickness of the coating shell is uniform (200nm~300nm), and the grain size of TiO2 is about 12NM The composite photocatalysis material has excellent photocatalysis performance under ultraviolet and sunlight, and has good stability and reusability Under the sun light, the decolorization rate and COD removal rate of Rhodamine B solution in 2 hours are over 95%; the degradation rate of phenol in 6 hours is 99.18%; the degradation rate of COD is 95.59%; the formaldehyde removal rate in 24 hours is over 80% The function and application of Nano-TiO2 / diatomite composite photocatalysis material nano-TiO2 / diatomite composite photocatalysis material has the valuable optical properties of nano-TiO2 It has a bright future in the coating industry and many other fields Nano-TiO2 / diatomite composite photocatalysis material has high chemical stability, thermal stability, non-toxic, no secondary pollution and other advantages It can be widely used in green environmental protection coatings, paints, UV resistant materials, sunscreen, paper, rubber and other industries 1 Air purification function According to the Bulletin No 153 issued by the World Health Organization in 2004, formaldehyde causes cancer and is listed as a highly toxic chemical by the state, which will strongly stimulate the eyes, skin, respiratory tract and mucous membrane, and eventually lead to abnormal immune function, liver injury and the impact on the central nervous system, which will lead to fetal malformation, leukemia, chronic respiratory diseases, menstrual disorders, acute depression NPC and other diseases Generally from wood-based panel, furniture, plastic, wallpaper and paint and other large-scale use of adhesives, once the home furnishings encounter heat and humidity, formaldehyde will volatilize from these materials Nano TiO2 / diatomite composite photocatalysis material has strong oxidation and decomposition effect on formaldehyde, benzene, ammonia and other volatile organic pollutants in the air The hydrogen oxygen free radical and active oxygen produced by nano-TiO2 uniformly coated on the surface of diatomite can redox organic substances and harmful gases, and transform them into pollution-free water and carbon dioxide, which can fundamentally solve the air pollution and achieve the effect of air purification It is not only effective, but also absolutely safe for human body In addition, nano-TiO2 / diatomite composite photocatalysis materials can release negative oxygen ions, but also a real green living environment Therefore, it is the most ideal material for indoor environmental pollution control at present and even in the future Adding nano-TiO2 / diatomite composite photocatalysis material to the coating can produce green, efficient and environmental friendly coating It can use unique photocatalysis technology to decompose and eliminate toxic gases in the air It can absorb and eliminate harmful gases such as formaldehyde and ammonia, and make indoor air more fresh This kind of coating is actually a high-grade, high-efficiency environmental protection and sanitary coating, which is suitable for the coating of families, hospitals, hotels and schools 2 The World Health Organization (who) and the U.S Environmental Protection Agency (EPA) published research literature on bactericidal function, pointing out that the level of indoor air pollution is generally much higher than that of outdoor air pollution, usually 2-5 times, in extreme cases, more than 100 times People spend 90% of their time indoors Especially for infants and young children, they breathe more air than adults, so they are exposed to and inhaled more indoor pollutants There are a variety of harmful microorganisms in people's living environment, especially in some humid places in the room The microorganisms are easier to reproduce, which leads to the increase of bacterial concentration in the air and on the surface of articles, thus causing harm to human body The surface of nano-TiO2 diatomite composite photocatalysis material is coated with nano-TiO2 film with thickness of 200nm ~ 300nm, and the internal electrons are activated to form superoxide of oxygen The super oxidation ability can destroy the cell membrane of virus cells, make the cytoplasm lose and die, coagulate the protein of virus, and inhibit the activity of virus, Nano TiO2 / diatomite composite photocatalysis materials can decompose the harmful compounds released from the bacterial corpse while killing bacteria, so as to achieve the functions of air purification, anti bacteria, anti mildew, anti pollution and anti odor Nano-TiO2 / diatomite composite photocatalysis material can be used to produce antibacterial and antifouling materials for sterilization, antifouling, deodorization and self-cleaning It can be used in hospital ward, operating room, family toilet and other places where bacteria are dense and easy to reproduce, and can effectively kill harmful bacteria such as E.coli, yellow glucose bacteria and prevent infection 3 The (200nm ~ 300nm) nano-TiO2 film, which is uniformly coated on the surface of UV resistant functional nano-TiO2 / diatomite composite photocatalysis material, can not only absorb UV, but also reflect and scatter UV, but also pass through visible light It is a physical shield agent and UV line protector with excellent performance and great development prospect The nano-TiO2 / diatomite composite photocatalyst can be used as a good coating and plastic filler, and can replace the organic UV absorber because of its light permeability, large specific surface area and UV absorption capacity It can improve the aging resistance of coatings 4 The treatment function of organic wastewater nano-TiO2 / diatomite composite photocatalysis material is very ideal for the treatment of organic wastewater Professor Zheng Shuilin and others from China University of mining and Technology (Beijing) used nano-TiO2 / diatomite composite photocatalysis material to degrade phenol and organic pollutants in coking wastewater under sunlight Under the action of Nano-TiO2 / diatomite composite photocatalyst, the concentration of phenol and COD in the wastewater fell to the national first-class discharge standard after 6 hours of sunlight This result has an effect on organic wastewater A practical method is put forward to deal with the problem Nano-TiO2 / diatomite composite photocatalyst is one of the most potential photocatalysts Nano-TiO2 / Diatomite Composite Photocatalyst not only can purify the organic pollutants in the air, but also has strong general bactericidal performance, high efficiency, low cost, no impact on the environment and human body due to its high catalytic, oxidation activity and chemical stability The characteristics of harm can greatly improve indoor air quality and living environment It can be predicted that its application in the field of environmental protection will show an attractive prospect 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