With the acceleration of urbanization and the development of industrialization, air pollution has become increasingly serious, posing a huge threat to human health and the ecological environment. In order to meet this challenge, researchers have continuously explored and developed efficient air purification technologies. Among them, photocatalytic reactors, as a new type of air purification technology, have received widespread attention.

Photocatalytic reactors use light energy to drive chemical reactions, and use photocatalysts to oxidize or reduce substances adsorbed on the surface of the catalyst. In the field of air purification, photocatalytic reactors can efficiently degrade harmful gases in the air, such as formaldehyde, benzene, volatile organic compounds (VOCs), etc., while releasing oxygen and improving indoor air quality. The core of this technology lies in the selection and performance optimization of photocatalysts, as well as the design of reactors.

In terms of photocatalysts, researchers are constantly developing new and efficient photocatalysts to improve the efficiency of photocatalytic reactions. For example, titanium dioxide (TiO?) is a common photocatalyst, but its light absorption range is narrow and it is mainly active in the ultraviolet region. In order to improve its activity under visible light, researchers have broadened the light absorption range of photocatalysts through doping, modification and other methods, so that it can work under a wider range of lighting conditions.

In terms of reactor design, researchers are committed to optimizing the structure of the reactor to improve the utilization rate of light energy and the efficiency of catalytic reactions. For example, by increasing the surface area of the reactor, improving the dispersion of the photocatalyst, optimizing the airflow distribution and other measures, the reactor's ability to adsorb and degrade harmful gases can be improved.

The application of photocatalytic reactors in the field of air purification has achieved remarkable results. Studies have shown that under appropriate conditions, photocatalytic reactors can reduce the concentration of harmful gases such as formaldehyde and benzene in the air to below the safe level. In addition, photocatalytic reactors also have functions such as sterilization, disinfection, and deodorization, which can further improve indoor air quality.

However, photocatalytic reactors still face some challenges in practical applications. For example, the stability and regeneration of photocatalysts, maintenance and management of reactors and other issues need to be further optimized and resolved. In addition, the cost of photocatalytic reactors is also a factor affecting their widespread application.

In summary, as a new high-efficiency purification technology, photocatalytic reactors have broad application prospects in the field of air purification. By continuously optimizing the design of photocatalysts and reactors and improving the efficiency of photocatalytic reactions, it is believed that photocatalytic reactors will become one of the important means to solve air pollution problems in the future.