Photocatalysis

Photocatalysis is a phenomenon in which light-driven chemical reactions are catalyzed by certain materials. In photocatalysis, light is absorbed by a photocatalyst material, which then generates energetic electrons and holes. These charged particles can participate in chemical reactions, either by directly reacting with surrounding substances or by serving as catalysts to promote other chemical reactions. Photocatalysis has wide-ranging applications, including air and water purification, self-cleaning surfaces, and the synthesis of chemical compounds. For example, photocatalysts can be used to break down harmful pollutants and organic compounds in the air and water, helping to improve air and water quality. Some of the most commonly used photocatalysts include titanium dioxide (TiO2), zinc oxide (ZnO), and iron oxide (Fe2O3). These materials have been extensively studied due to their relatively low cost, stability, and abundant availability. In summary, photocatalysis is a field of study that deals with the use of light to drive chemical reactions. It has many practical applications in fields such as environmental science, energy, and materials science.