How does photocatalytic oxidation technology help mobile car air purification?
Publish Time: 2024-11-11
Photocatalytic oxidation technology plays an important role in mobile car air purification and provides an efficient solution for improving air quality.
1. Principle of photocatalytic oxidation
Photocatalytic oxidation technology decomposes pollutants based on the strong oxidizing substances produced by photocatalysts under light. Taking the common titanium dioxide (TiO₂) photocatalyst as an example, when it is irradiated with ultraviolet rays of a specific wavelength, its valence band electrons are excited to the conduction band, thereby generating electron-hole pairs. These electron-hole pairs react with the surrounding water and oxygen molecules to generate active species such as hydroxyl radicals (・OH) and superoxide anions (O₂⁻) with strong oxidizing properties. These active species can react with pollutants in the air, such as volatile organic compounds (VOCs), nitrogen oxides (NOₓ), bacteria and viruses, and gradually decompose them into harmless carbon dioxide, water and other small molecules.
2. Advantages of application in Mobile Car
High-efficiency purification capability: Mobile Car needs to operate in environments with different pollution levels, and photocatalytic oxidation technology has a good removal effect on a variety of pollutants. Whether it is pollutants produced by automobile exhaust emissions commonly seen in urban streets or complex organic pollutants that may exist in industrial parks, they can be effectively decomposed. For example, for common VOCs such as benzene and formaldehyde, photocatalytic oxidation can quickly oxidize them and reduce their concentration in the air, thereby improving the air quality in and around the car.
Adapt to the mobile environment: Mobile Cars will face changing environmental conditions during driving. Photocatalytic oxidation reactions do not require complex pretreatment processes, and can continue to work as long as there is appropriate light and air contact. Moreover, photocatalysts usually have good stability and can remain active for a long time under conditions such as vehicle vibration and temperature changes, and will not easily fail due to the characteristics of mobile operations.
Cooperation with other purification technologies: Mobile Car air purification equipment often combines multiple technologies. Photocatalytic oxidation technology can be combined with technologies such as activated carbon adsorption and electrostatic dust removal. For example, activated carbon adsorption can first remove larger particles and some organic pollutants, and then photocatalytic oxidation can further decompose small molecular pollutants that are difficult for activated carbon to handle, thereby achieving a more comprehensive and efficient air purification effect.
3. Optimization in practical applications
In order to better apply photocatalytic oxidation technology in Mobile Car, it is necessary to optimize the carrier and illumination system of the photocatalyst. Selecting suitable carrier materials, such as porous ceramics, fibers, etc., can increase the specific surface area of the photocatalyst and increase its contact probability with pollutants. At the same time, design an efficient ultraviolet lamp layout to ensure that the photocatalyst can fully receive light, thereby maximizing its photocatalytic oxidation ability and ensuring that Mobile Car can effectively purify the air in different scenarios.
