Photocatalyst is a general term for chemical substances that can play a catalytic role under the excitation of photons. The typical natural photocatalyst is the common chlorophyll, which promotes the carbon dioxide and hydration in the air to become oxygen and carbohydrate in the photosynthesis of plants.
Photocatalyst technology is an environmental purification technology with broad application prospects because it does not consume earth energy, does not use harmful chemicals, and can only use the light energy of sunlight to remove and purify environmental pollutants at low concentrations, and can also be used as an antibacterial agent and mildew inhibitor. In the future, with the in-depth development of the research on photocatalyst technology, the number of photocatalyst products applied in the fields of architecture, household appliances, coatings, and life will continue to increase, and the application in the fields of water pollution control, medical facilities and instruments, and agriculture will attract attention. The market prospect of photocatalysts is promising.