Photocatalytic Degradation of Gaseous Formaldehyde Using TiO2 Film

摘要: The photocatalytic degradation of gaseous formaldehydea major cause sick building syndromewas studied using a TiO2 thin film. films have many unique photoinduced properties, for example, self-cleaning, anti-fouling, and anti-bacterial functions. UV illumination the film placed in formaldehyde/air environment resulted total mineralization formaldehyde to CO2 H2O. We invoked Langmuir−Hinshelwood kinetic model analyze dependence reaction rates on concentration formaldehyde. In addition, overall decomposition rate constant was comparable that acetaldehyde (a standard test reactant) initial concentrations up 1000 ppmv. However, apparent adsorption Kapp onto ca. 2.5 times larger than acetaldehyde. Thus low regime, reactivity appeared be greater like manner, dark experiment als...