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Identification Method of Photocatalyst Mosquito Lamp
專欄:Corporate news
發布日期:2018-12-03
閱讀量:2527
作者:佚名
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No matter what color of photocatalyst solution, there should be Dindal phenomenon. Fake and inferior products are precipitated due to poor material selection and poor dispersion process.

1, look at the color. Because of the different preparation methods and different uses, photocatalysts show different colors. Common colors are milky white, light yellow, light blue or colorless liquid, translucent liquid. If the color is dark, it is a fake and inferior photocatalyst product.

2, light dispersion. When visible light passes through the sol, it will produce obvious scattering effect, that is, the Tindal phenomenon. Colloids have Tindal phenomena, but solutions do not, so we can use Tindal phenomena to distinguish colloids from solutions. No matter what color of photocatalyst solution, there should be Dindal phenomenon. If there is no Tindal phenomenon, it is a fake and inferior photocatalyst product.

3, stability. Photocatalyst dispersion technology is good, generally not stratified, precipitation, but if the nanoparticle size is small, there is no dispersant, then a little condensation may occur for a long time stationary, shake a few times when using, do not affect the performance. If precipitation occurs easily and more precipitation occurs, it is a fake and inferior photocatalyst product. Fake and inferior products are precipitated due to poor material selection and poor dispersion process. This precipitation is not caused by the so-called high content of nano-titanium dioxide, but by material and technical reasons. One reason is that ordinary titanium dioxide is used to counterfeit nano-sized titanium dioxide, which is thousands of times larger. The other reason is that the production process is not up to standard, and nano-sized titanium dioxide is in a state of agglomeration, which is far greater than the national nano-technology standard of 100 nanometers.

4, look at bubbles. After shaking the photocatalyst forcefully, a small amount of clear water bubbles will be produced and disappear quickly. If the bubbles like soap bubbles are produced after shaking and disappear for a long time, they will be fake and inferior photocatalyst products.

5. See the fading function. The methyl blue was diluted and dripped onto the ceramic sheet which had been sprayed with photocatalyst. After illumination, the blue disappeared quickly. If it can not fade or the fading is not obvious, it is a fake and inferior photocatalyst product.

6. The effective time. Photocatalysts decompose organic matter through surface action, so it takes a period of time to have a more obvious treatment effect. High-quality photocatalysts generally need 7-15 days to decompose organic matter.

7. Look at the lighting conditions. Photocatalysts act as catalysts by absorbing the energy of light. Photocatalysts in the absence of light have no energy source, so they have no effect. According to the data, there are few products up to 550 nm that can be mass produced.

8. Look at the enterprise standard for the record. Standards are the basic documents to regulate the production of products by enterprises. At least, the production of products by enterprises should have the enterprise standards registered by the municipal quality and technical supervision bureau.

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