The Experimental Research On Nanometre TiO₂/VACF Photochemical Catalysis Folium's Purifying Formaldehyde Pollution In Indoor Air

"Indoor air pollution"is the symbol of the third period of air pollution which comes after"coom ait pollution"and"photochemistry air pollution". Therefore, it's necessary to research a purificatory technology which can purify indoor HCHO pollution effectively. For the moment, nanometer TiO₂ photochemical catalysis technology is a purificatory measure which can remove gaseous pollutin effectively. Relatively, gas adsorption technology is a conventional technology which can also purify indoor air pollution. Burgeoning nanometer TiO₂ photochemical catalysis technology combines conventional gas adsorption technology would possess quite developmental foreground in purifying the indoor air pollution.This thesis researchs on photochemical catalysis-adsorption technology degradating indoor HCHO by the measure of theoretics analysis, matrix foundation and experimental validation, etc.This thesis designes a experimental cabin based on photochemical catalysis technology and prepares TiO2/VACF photochemical catalysis folium used the ways of daubing, and takes some experiments on decontaminating the HCHO pollution include direct photolyze experiment, single photochemical catalysis experiment, single adsorption experiment and photochemical catalysis - adsorption experiment. Besides, the thesis analyses the process of TiO2/VACF photochemical catalysis folium degradating HCHO and founds photochemical catalysis-adsorption dynamics equation of HCHO decontaminated, and takes the photochemical catalysis-adsorption experiment when concentrtion of HCHO is changed. And that, it confirms the order of reaction and validates the dynamics equation. This thesis also takes the photochemical catalysis - adsorption experiment when relative humidity and ultraviolet light power are changed by simulating the indoor relative humidity and adjusts the ultraviolet lamps. Finally, this thesis takes the experiment on decontaminating the HCHO pollution which released from three representative architechtural decorative stuff (xylary acoustical board, wallpaper and glass wool acoustical board)which used in the Chongqing International Exhibition Centre where"Asia Pacific Cities Summit"will be developed. The result shows that the effect of degradating HCHO is not very effective obviously only by ultraviolet radiation. The effect of decontaminating HCHO is quite efficacious by TiO2/VACF photochemical catalysis folium which is superorious over...