The Study of Methods for the Degradation of Organic Dyes by Photocatalytic Nanoparticles Using Plasmonic Property

Water pollution, population growth and the increasing demand for clean water have led humans to water treatment and reuse. Therefore, efforts to improve wastewater treatment techniques and the degradation of toxic compounds into non-toxic compounds have always been considered. photocatalysts, due to rapid oxidation and degradation of pollutants than traditional methods, as known as low-cost, environmental friendly and efficient method. Photocatalysts are semiconductors that absorb light then generate electrons and holes, which after reacting with water and oxygen, and producing radical species such as superoxide, etc., cause the degradation of organic compounds.The metallic nano-structures with plasmonic effect has an influence on increasing the light absorption amplitude of semiconductors. Surface plasmon resonance in metallic nano-structures against light generates plasmonic energy, which is transmitted to the semiconductor by three main mechanisms: light scattering, PIRET-induced resonance energy transfer and hot electron injection, which researches indicate that these factors increase photocatalytic efficiency in dye degradation.