Qingdao West Coast Aoyin Company

Identification of photocatalyst authenticity and color. Due to different preparation methods and different uses, photocatalysts exhibit different colors. Common colors include milky white, light yellow, light blue or colorless liquid, and translucent liquid. If the color is dark, it is a fake photocatalyst product.
, light dispersion. When visible light penetrates the sol, significant scattering occurs, which is the Tyndall phenomenon. Colloids have Tyndall phenomenon but solutions do not, so Tyndall phenomenon can be used to distinguish colloids and solutions. No matter what color the photocatalyst solution is, there should be Tyndall phenomenon. If there is no Tyndall phenomenon, it is a shoddy photocatalyst product.
, stability. Photocatalyst dispersion technology is better and generally does not delaminate or precipitate. However, if the nanoparticle size is small and there is no dispersant, there may be a slight agglomeration phenomenon when left standing for a long time. Shaking it a few times during use will not affect the performance. If precipitation occurs easily and there is a lot of precipitation, it is a fake photocatalyst product. Fake and inferior products cause a large amount of precipitation due to poor material selection and poor dispersion technology. This precipitation is not caused by the so-called high content of nano-titanium dioxide, but is entirely caused by material and technical reasons. One reason is that ordinary titanium dioxide is used to fake nano-scale titanium dioxide particles that are thousands of times larger. Another reason is that the production process is not up to standard and the nano-titanium dioxide is in an agglomerated state that is much larger than the national nanotechnology standards.
, look at the bubbles. If the photocatalyst is shaken vigorously, a small amount of clear water bubbles will appear and disappear quickly. If soap bubbles appear after shaking and it will take a long time to disappear, it is a fake photocatalyst product.
, look at the fading function. Dilute methyl blue and drop it on the photocatalyst-sprayed ceramic tile. The blue color will disappear quickly after illumination. If it cannot fade or the fading is not obvious, it is a fake photocatalyst product.
, look at the onset of effect. Photocatalyst decomposes organic matter through surface action, so it takes a period of time to have a more obvious treatment effect. High-quality photocatalysts generally require 1 day to decompose organic matter.
, Look at the lighting conditions. Photocatalyst is a lightless state that performs catalytic action by absorbing light energy. Photocatalyst has no energy source and therefore has no effect. According to data, there are still very few products that can be mass-produced.
, look at the enterprise standard filing. Standards are basic documents that regulate the production of products by enterprises. The products produced by enterprises should at least have enterprise standards registered with the municipal quality and technical supervision bureau.
Identification of photocatalyst quality
Is it layered? Use a centrifuge for several minutes to spin. If the photocatalyst appears to be delaminated, it must contain a dispersant. The photocatalyst that does not appear to be delaminated does not contain a dispersant. High-quality photocatalysts do not contain dispersants.
, Is there any residue? Put a small amount of photocatalyst into the crucible and heat it fully with an alcohol lamp. If the residue is black and ash-like, it contains binder; otherwise, there is no binder. High-quality photocatalysts do not contain binders.
, Is there a smell? If there is an odor of alcohol, resin, or other organic matter when opening the bottle cap of the photocatalyst package, it is a poor-quality photocatalyst. High-quality photocatalysts are odorless aqueous solutions.
, Is it neutral? Measure the pH value. If the photocatalyst value is below or above, the corrosion effect will be obvious and the surface of the wall, furniture, and fabrics may become discolored. High-quality photocatalyst products have a neutral value close to the average - and will not corrode objects.
Will it change color? Inferior photocatalysts will turn black within a few hours under direct sunlight. This is because titanium dioxide will undergo a photocatalytic reaction under light and oxidize the organic components in its solution. High-quality photocatalysts will not change color under light.
, Is it sticky? Inferior photocatalysts are in a pasty, thick, and sticky state. High-quality photocatalysts are basically non-viscous like water.
Is there any testing? Before choosing a photocatalyst product, you must require the photocatalyst manufacturer to issue three test reports from an authoritative testing agency, namely a sterilization effect test report, a harmful substance degradation effect test report and a product non-toxic test report. All three reports must be printed with the logo (National Metrology Certification unit logo).
Among these three reports, the non-toxic test report is the most important. If the manufacturer cannot provide a non-toxic test report when consumers choose photocatalyst products, it means that other harmful substances have been added to the photocatalyst products during the processing. The non-toxic characteristics of the products have been destroyed. The use of inferior photocatalysts poses environmental and health risks.
, concentration identification. The commonly used photocatalyst concentration is .-.%. The photocatalyst with additives can reach more than %. However, the surface of the photocatalyst with additives will be partially covered by the additives, affecting the photocatalytic performance. If there are no additives and the photocatalyst concentration reaches %, the performance is already very excellent. High-quality photocatalysts contain no additives.
, Particle size identification. The performance of the photocatalyst is related to the particle size of titanium dioxide. The smaller the particles, the better the photocatalytic effect. Except for laboratories, there are currently very few companies in the world that can reach sub-nanometer levels in large-scale production.
, attachment identification. High-quality photocatalysts have good adhesion and can form a strong film after spraying and drying. It is through this film that titanium dioxide absorbs ultraviolet rays from sunlight and produces photocatalysis. Whether a film can be formed after spraying directly affects the degradation effect, and whether the film layer is strong or not affects whether the product can last long. A type of inferior photocatalyst cannot form a film layer after spraying and quickly pulverizes after drying. Another type of photocatalyst can form a film after spraying, but it disappears immediately after being wiped with a damp cloth. Both types of products are unable to properly perform the role of photocatalysts in degrading pollution and sterilizing. Before purchasing, consumers can dip a small amount of photocatalyst with their fingers and apply it evenly on a dark tabletop. After drying, observe the film-forming state and wipe it with a damp cloth to observe its adhesion. If the product is powdery or fails to adhere, you can conclude that the product is of poor quality.
Main service content: Formaldehyde detection, formaldehyde removal and odor removal
Main business service scope: Qingdao, Huangdao, Jiaonan, Jiaozhou, Chengyang, Jimo, Shouguang, Qingzhou
Contact person: Manager Ye
Mobile phone: < br/> Contact number:
Company:
Company WeChat ID:
Email: @.
Company address: Shandong Huazhite, Jindu Garden Block, Hong Kong Middle Road, Qingdao City, Shandong Province ( Aoyin Photocatalyst Service Center) (in Shinan)