Photocatalytic oxidation technology

Photocatalytic oxidation technology is developed on the basis of photochemical oxidation technology. Photochemical oxidation technology is a process of oxidation and degradation of organic pollutants under the action of visible or ultraviolet light. Part of the near-ultraviolet light in the natural environment (290-400nm) is easily absorbed by organic pollutants, and strong photochemical reactions occur when active substances are present, thus degrading organic matter. However, due to the limited reaction conditions, photochemical oxidation degradation is often not thorough enough, and it is easy to produce a variety of aromatic organic intermediates, which has become a problem to be overcome by photochemical oxidation.

Since Carey et al. first used TiO2 photocatalytic degradation of biphenyls and chlorinated biphenyls in 1976, the research focus of photocatalytic oxidation technology has shifted to the direction of photocatalytic oxidation degradation of organic pollutants using TiO2 as a catalyst.

Due to the simple equipment structure, mild reaction conditions, easy control of operating conditions, strong oxidation capacity, no secondary pollution, and high chemical stability of TiO2, non-toxic and inexpensive, TiO2 photocatalytic oxidation technology is a new water treatment technology with wide application prospects.