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What is the difference between nano titanium dioxide and pho

What is the difference between nano titanium dioxide and photocatalyst?
The difference between nano titanium dioxide and photocatalyst:
1,Nano titanium dioxide
Nano-TiO2 is a white loose powder with strong UV-shielding effect, good dispersibility and weather resistance. It can be used in the fields of cosmetics, functional fibers, plastics, paints, paints, etc., as an ultraviolet shielding agent to prevent ultraviolet rays. It can also be used in high-grade automotive topcoats with a flop effect.
2 , Photocatalyst
Photocatalyst is a general term for photocatalytic photo-semiconductor materials represented by nano-sized titanium dioxide. It is coated on the surface of the substrate and produces strong catalytic degradation under the action of ultraviolet light and visible light: it can effectively degrade the air. It is toxic and harmful; it can effectively kill a variety of bacteria, and can decompose and harm the toxins released by bacteria or fungi; it also has functions such as removing formaldehyde, deodorizing, anti-fouling and purifying air.