They include advanced, membrane-filtered wastewater treatment systems, solar-powered, high-efficiency lighting and natural gas combined-cycle turbines that will deliver power, heating and cooling.

Photocatalysis has been widely used in wastewater treatment, air cleaning, sterilization, antifouling and self-cleaning materials, dye-sensitized solar cell, cosmetic, air sensor, etc.

Solar photocatalysis was one of the technologies with clean and economizing energy for the wastewater treatment.