Photocatalytic Degradation of Organic Pollutants under Visible Light Irradiation

In recent years, the applications of nanoparticles separately and independently of nanotechnology have made significant progress, for example, the production of nanoparticle photo catalysts has significantly increased the catalytic efficiency of certain materials, and the variety of their applications has been developed. The spread of pollutants in surface water and groundwater has become an important issue worldwide due to population growth and the rapid development of industrialization. Therefore, it is necessary to control the harmful effects of pollutants and improve environmental conditions. Recently, the use of nanoparticles to remove environmental pollution and remove organic pollutants has caused photo catalysts and their potential applications to be widely considered. Photo catalysts are materials that receive energy from a specific wavelength of light and cause a reaction to occur. The catalytic principle of visible light is based on the visible light irradiation light catalyst, the capacity band of the catalyst is from the electron transfer of the ground state of light to the conduction band, the generation of holes born from light and photo electronics, the holes of light with water molecules to produce hydroxyl free radicals, electrons and molecule reactions Oxygen produces superoxide anion and holes, hydroxyl radicals, and superoxide anion production. Reactive oxygen species can break down odor molecules, organic matter, bacteria, and other pollutants into water, carbon dioxide, and other small molecules. A small amount of N, S and P in organic matter produces nitrate, sulfate, phosphate, etc. after decomposition, to play the effect of detoxification, deodorization and sterilization. Visible light photocatalytic coating technology offers a new green solution for indoor and outdoor air purification.

Photocatalytic Degradation of Organic Pollutants under Visible Light Irradiation Keywords:

photocatalytic particle , Organic pollutants , visible light radiation , Molecule , Solvent