Decoration pollution leads to the lack of photocat

2022-07-22
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Decoration pollution leads to the lack of photocatalyst standards, and the market is in chaos

in recent years, indoor environmental pollution has begun to receive widespread attention. Consumers found that their well-being nest had turned into a "poison gas room", which made more and more people who cherish their lives feel afraid and uneasy

the current situation of home decoration pollution presents a huge business opportunity for the pollution control industry. In just two years, a large number of environmental treatment products have poured into the market, and photocatalyst, as the latest technological achievement, has become an important product in the pollution treatment industry

according to relevant experts, photocatalyst product is a new environmental protection material that is becoming increasingly popular in the world at present, and its main component is nano titanium dioxide. After being sprayed on the wall, this product can form a layer of film, which can produce photocatalysis by absorbing ultraviolet rays in the sun, produce reactive oxygen species and hydroxyl radicals, and degrade harmful chemicals in the air, especially formaldehyde, benzene, ammonia, TVOC (total volatile organic compounds) and other harmful substances. Moreover, photocatalyst products also have strong sterilization function. Laboratory test results show that photocatalyst has strong killing ability against Escherichia coli, Klebsiella pneumoniae and Legionella. Because photocatalyst itself is non-toxic, it will not cause secondary pollution to the environment in the process of treatment, so it has attracted extensive attention of the global environmental protection industry

however, due to the lack of industry standards for domestic photocatalyst products, the whole market has been in chaos. A product with great market potential may be completely ruined by large-scale market speculation

chaos 1: there is no industry standard for products

according to insiders, at present, photocatalyst products not only have no industry standard in China, but also have no unified production standard in the world. Therefore, some domestic small enterprises take advantage of this critical standard vacancy to produce inferior products under the banner of photocatalyst. Since 2003, relevant domestic institutions have been preparing to draft the industry standard of photocatalyst, but up to now, this standard has not been seen in the text

due to the absence of product standards, the quality supervision department has no identification basis and is unable to effectively supervise the quality of photocatalyst products entering the market. However, this vacancy has opened up a way for various "associations" to make money, and various paid "recommendations" have become the potential rules of competition in this market. Their evaluation and recommendation not only misled the market, but also greatly damaged the credibility of the government

chaos 2: products are mixed

because there is no unified industry standard, many speculative enterprises peddle fake and inferior products under the banner of photocatalyst products. According to experts from Tianjin Yuye Environmental Science Co., Ltd., the effective component of photocatalyst products is titanium dioxide of about 10 nm. The size of nanoparticles directly affects the photosensitive reaction ability of photocatalyst. If the nanoparticle size is too large, the photocatalyst activity will be greatly reduced, and even the photocatalytic reaction cannot occur

at present, the vast majority of domestic enterprises claim that their photocatalyst products are nano-sized, but only a few of the test results have reached this level. The particle size of titanium dioxide in some products is as high as 200 nm, which is far beyond the range of nano-sized products, resulting in poor photo reaction ability of their products

in order to create the effect after use, some manufacturers use formaldehyde remover to bundle with inferior photocatalyst, which is called "Photocatalyst partner". What's more, some manufacturers do not have titanium dioxide in their products, but claim to be a replacement product of photocatalyst. As a result, various "catalysts" flooded the market. However, the analysis results show that such products mostly contain a large number of acid organic components. The use of inferior products will undoubtedly cause more serious secondary pollution to the environment

chaos 3: product price chaos

at present, the price of photocatalyst products in the domestic market is extremely chaotic. Generally speaking, the retail price of imported products or foreign-funded products with a certain brand awareness is more than 800 yuan to 1500 yuan per kilogram, and individual products are more than 2000 yuan. However, the price war between domestic low-end products has become increasingly fierce. Some manufacturers sell their products in the form of OEM production, and their prices are even equivalent to purified water

insiders said that at present, the price of nano titanium dioxide in the international market is about 260 dollars per kilogram, which is equivalent to about 2.1 yuan per gram of titanium dioxide. Domestic OEM manufacturers cannot produce photocatalysts at the price of purified water. Such a low price can only prove that the products are fake

chaos 4: construction price confusion

the confusion of product prices will inevitably lead to price confusion in the construction market. According to Shanghai Liberation Daily, at an environmental products exhibition held in Shanghai not long ago, the construction prices of photocatalyst environmental treatment reported by various manufacturers were 168 times different, and the lowest construction price was only one yuan per square meter. Coincidentally, Hebei and other places also quoted a photocatalyst construction price of 3 yuan per square meter. Industry insiders believe that this price obviously contains fraud, and consumers must be vigilant

experts believe that photocatalyst is a potential environmental treatment product. High quality photocatalyst not only has the function of sterilization and degradation of harmful chemicals, but also has the characteristics of long duration and no secondary pollution. These characteristics have been confirmed in many projects at home and abroad. Not long ago, the "3E" Photocatalyst played an important role in the environmental governance of the venues and facilities of the Asia Europe finance ministers' meeting. However, the current chaotic state of the market undoubtedly hinders the healthy development of the whole industry. Therefore, relevant industry standards must be issued as soon as possible to bring competition into an orderly track

relevant people said that before the introduction of photocatalyst industry standards, consumers should have a basic sense of self-protection. When choosing photocatalyst products, manufacturers must be required to issue product pollutant degradation reports, sterilization reports and non-toxic test reports printed with CMA (national metrology certification) marks. Among the three reports, the non-toxic test report is the most important indicator report, because inferior photocatalysts cannot pass the non-toxic test because they use strong acids

background link: how to identify photocatalysts

when choosing photocatalyst products, general consumers first need the manufacturer to provide sterilization test reports with CMA marks, degradation of harmful substances and non-toxic experiment reports, and then judge the quality of products through sensory identification methods

at present, the common photocatalyst products in the domestic market are mainly divided into three colors: golden yellow, egg yellow and milky white. The first-class production process and nano-sized titanium dioxide particle size can make titanium dioxide evenly distributed in the photocatalyst liquid without precipitation and other flocs. Therefore, high-quality photocatalyst products are golden yellow transparent liquid. Such products will have blue luster when viewed by side light. Although the egg yellow product is opaque, its color is uniform, and there should be no obvious precipitated particles and flocs. If precipitation occurs, it indicates that the product dispersion process is backward, and the activity of the product may be affected

inferior products are mostly found in milky white products. Such products will precipitate after standing for 5 to 10 minutes, and a large amount of white particles will accumulate at the bottom of the bottle. This precipitation shows that the product dispersion process is poor, resulting in the agglomeration of titanium dioxide. This agglomeration will directly affect the photocatalytic activity, reduce the photocatalytic capacity of the product, and then lose the effectiveness of pollution degradation

high quality photocatalyst products have no peculiar smell, while poor quality photocatalysts have strong sour smell or strong alkaline taste. The appearance of peculiar smell indicates that a large number of organic components are added to the product in the production process, such as phosphoric acid and other highly corrosive acids, which will pollute and corrode the environment after spraying

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