Photocatalytic Oxidation of NOx with Porous TiO2 Nanometer Thin Film

A new kind of porous nano-TiO2 composite films was prepared on the glass substrate with the water glass as hinders and the sodium fluorosilicate as solidifying reagent. The morphologies of the films were studied by scanning electron microscope(SEM). The UV-Vis spectrophotometer was also used to investigate the absorption of the films. The gasphase photocatalytic oxidation of nitrogen oxides on the composite film was carried out in TiO2 UV system, and some important factors affecting the photocatalytic oxidation were also studied such as the catalyst concentration, vapor pressure and the presence of oxygen. The results showed the conversion of NOx reached 97.5% after 2 h UV-irradiation. The final product of photo-oxidation was detected to be HNO3 hy FT-IR. The way of photocatalytic oxidation of NOx was possibly useful in the practical application.

Photocatalytic oxidation of NO x with porous TiO2 nanometer thin film

A new kind of porous nano TiO₂ composite films was prepared on the glass substrate with the water glass as binders and the sodium fluorosilicate as solidifying reagent. The morphologies of the films were studied by scanning electron microscope(SEM). The UV Vis spectrophotometer was also used to investigate the absorption of the films. The gas phase photocatalytic oxidation of nitrogen oxides on the com posite film was carried out in TiO₂ UV system, and some important factors affecting the photocatalytic oxidation were also studied such as the catalyst, concentration vapor pressure and the presence of oxygen. The results showed the conver sion of NO _x reached 97.5°, after 2 h UV irradiation. The final product of photo oxidation was detected to be HNO₃ by FT-IR. The way of photocatalytic oxidation of NO _x was possibly useful in the practical application. Foundation item: Supported by the Key Technologies Research and Development Programme of the Ninth Five year Plan of China (96 551-03-01) Biography: WANG Song-lin (1979), male. Master candidate, Research direction: nano-materials.