Volatile organic compounds（VOCs） are the main indoor pollutants. The conventional methods to treat them are either of high cost or of secondary pollution risk. In order to develop an efficient and low consuming purification system against VOCs

dielectric barrier discharge（DBD） is innovatively introduced to cooperate with photo-catalytic treatment. Instead of using ultraviolet light solely to activate photo-catalytic materials

the low-pressure plasma generated from DBD plays an important role in the process and greatly reduces the energy consumption. Final products of the system are small inorganic molecules

such as CO2 and H2 O

and a small amount of non-toxic by-products. In the experiments

modified Ti O2 as photo-catalyst was loaded on the electrode surface

and the VOCs were successfully treated by DBD and the photo-catalytic in the treatment room. The cooperating treatment had obviously higher efficiency than either DBD or photo-catalytic treatments. By theoretically analyzing the mechanism of DBD and photo-catalytic treatments

we investigated the relation of cooperated treatment efficiency with treatment settings

such as electrode diameter

temperature

humidity

catalyst location

and catalyst quantity. It is concluded that the treatment efficiency is negatively correlated with electrode diameter and humidity

positively correlated with catalyst amount

but barely correlated with temperature. Loading the catalyst on the positive electrode can lower the treatment efficiency compared to catalyst on the negative electrode. By combining DBD and photo-catalytic treatments together

the two means complement each other and blend into a method that paves the way for developing VOCs treatment of high efficiency

low power consumption

and limited innocuous by-products.