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Nowadays, we often hear the term "photocatalyst". It can not only decompose formaldehyde but also purify the air. Its function is very powerful. So how does photocatalyst achieve air purification and how many functions does it have? Let's learn about it together.
What is photocatalyst
Photocatalyst is called "photocatalyst" in English. Industry experts believe its correct Chinese name should be "photocatalyst," as it's a portmanteau of the words "light" and "catalyst." Photocatalyst is a general term for photo-semiconductor materials, such as nano-sized titanium dioxide, that possess photocatalytic properties.
So why can this photocatalytic technology be antibacterial? Simply put, photocatalytic technology is to apply photo-semiconductor materials with photocatalytic functions, such as nano- and titanium dioxide, to the surface of the substrate. Under the action of ultraviolet rays, it produces a strong catalytic degradation function, degrading toxic and harmful gases in the air.
Part 1. Scientific Analysis of Photocatalytic Principles
Photocatalytic principle diagram
Part 2. Functions of Photocatalyst
1. Air purification function: It can purify harmful organic substances such as formaldehyde, benzene, ammonia, sulfur dioxide, carbon monoxide, nitrogen oxides, etc. that affect human health.
2. Bactericidal function: It has bactericidal effect on Escherichia coli, Staphylococcus aureus, etc., and can decompose harmful compounds released from the dead bacteria while killing bacteria.
3. Deodorizing function: It has deodorizing effect on cigarette odor, toilet odor, garbage odor, animal odor, etc.
4. Anti-fouling function: It can prevent the generation of oil, dust, etc. It can also prevent the generation of mildew, water rust in the bathroom, yellow alkali and rust in the toilet, and fading of painted surfaces.
Part 3. Characteristics of Photocatalyst
1. Environmentally friendly and non-toxic
The representative material of photocatalyst is TiO2, which has high chemical stability and is approved by the U.S. Food and Drug Administration (FDA) as a safe substance. It is harmless to the human body and is widely used in food, daily necessities, cosmetics, medicine, and aquaculture.
2. Disinfection and sterilization
After absorbing natural light, photocatalysts possess a strong ability to absorb electrons, resulting in strong oxidizing properties. They can effectively catalyze the decomposition of harmful organic and inorganic substances, while also eliminating bacteria and viruses. For example, photocatalysts can degrade harmful indoor volatile organic compounds (VOCs) such as formaldehyde, dichlorobenzene, toluene, xylene, and TVOC into harmless small molecules of water and CO2. They can also decompose and neutralize toxins released by bacteria and fungi.
3. Permanence
The photocatalyst stock solution is quick-drying. Once applied to the substrate, it dries quickly and becomes insoluble, reaching a hardness equivalent to a 4H pencil within 10 days. Under normal conditions, it resists wear and tear, and the photocatalyst itself remains unchanged or undamaged. Under light irradiation, it continuously purifies pollutants, offering the advantages of long-lasting, sustained action.
4. Super hydrophilicity
The photocatalyst-coated surface has a large contact angle with water, but after exposure to natural light, the contact angle decreases to below 5°, even reaching 0°, indicating that the water droplet is completely immersed in the photocatalyst surface, indicating a very strong superhydrophilic property. After the light is removed, the surface's superhydrophilicity can be maintained for several hours to about a week, then slowly returns to its pre-irradiation hydrophobic state. Further exposure to ultraviolet light can restore the superhydrophilicity, and intermittent ultraviolet light exposure can maintain the surface's superhydrophilic state.
5. Self-cleaning
Surfaces treated with photocatalysis are stimulated by natural light and can break down organic matter on contact, not only sterilizing but also breaking down harmful substances into harmless small molecules. Furthermore, due to the super-hydrophilic properties exhibited under light conditions, dust that falls on the photocatalyst coating can be cleaned with just water.
Qiannianzhou Photocatalyst Antibacterial Eco-Board utilizes exclusive patented technology. Using blockboard as a substrate, it utilizes next-generation nano-photocatalyst technology to ionize the air, damaging bacterial cell membranes, inhibiting and decomposing bacterial protein synthesis, and effectively breaking down harmful substances into harmless carbon dioxide and water. While retaining the advantages of furniture eco-board, such as paint-free and smooth surface finish, it effectively safeguards a healthy home environment.
Photocatalyst antibacterial panels fight bacteria, take effect quickly, and decompose bacteria indoors and outdoors continuously 24 hours a day. They are safe and environmentally friendly, creating a healthy indoor environment.