Figure 2
From: Persistent deNOx Ability of CaAl2O4:(Eu, Nd)/TiO2-xN y Luminescent Photocatalyst
The emission decay profile of CaAl 2 O 4 :(Eu, Nd)/TiO 2- x N y composite after irradiation by the mercury lamp used for photocatalytic reactions. The inset shows the decline of the intensity of the emission.