ABSTRACT
In order to study the TiO2 photocatalysis material to purify the automobile exhaust in tunnel, soluble gel method was used to prepare nano-TiO2 photocatalyst, with different dosage of Fe3+ to modify nano-TiO2, and the sample was made after being calcined under 500ºC condition. Doping Fe3+ can capture the electrons and holes so that it can help to reduce the recombination probability of electron hole pairs and improve the photocatalytic performance of nano-TiO2. Compared with the purification efficiency of nano-TiO2 without Fe3+, the purification efficiency of nano-TiO2 with 0.1% Fe3+ to CO, CO2, HC and NOx can be improved by 0.6%, 0.5%, 2.3% and 8.2% respectively under the weak UV light condition.
