info:eu-repo/semantics/article
Kinetic study of air treatment by photocatalytic paints under indoor radiation source: Influence of ambient conditions and photocatalyst content
Fecha
2020-07Registro en:
Salvadores, Federico; Alfano, Orlando Mario; Ballari, Maria de Los Milagros; Kinetic study of air treatment by photocatalytic paints under indoor radiation source: Influence of ambient conditions and photocatalyst content; Elsevier Science; Applied Catalysis B: Environmental; 268; 7-2020
118694-1/11
0926-3373
CONICET Digital
CONICET
Autor
Salvadores, Federico
Alfano, Orlando Mario
Ballari, Maria de Los Milagros
Resumen
Photocatalytic building materials constitute a promising technology to control air pollution, although intrinsic kinetics is needed for prediction of decontamination processes. Herein, the kinetic study of acetaldehyde oxidation was carried out applying photocatalytic paints under normal indoor illumination source and different ambient conditions. An intrinsic kinetic model for the main contaminant and reaction intermediates was proposed as a function of the Local Superficial Rate of Photon Absorption, which was evaluated for paints containing different amounts of carbon doped TiO2. A novel parameter to account for the relationship between photocatalytic active area, TiO2 amount and particles agglomeration in the paints was proposed. Also, based on the model predictions and the photocatalyst bandgap energy a spectral radiation analysis was performed determining the maximum wavelength at which the photocatalyst is active. Finally, the quantum and photonic efficiencies were calculated and the effect of operating conditions on these efficiencies was analyzed.