La2MnTiO6 double perovskite nanostructures as highly efficient visible light photocatalysts

چکیده مقاله

In this paper, we reported, for the first time, the preparation of La2MnTiO6 double perovskite
nanostructures using a simple sol–gel method in the presence of citric acid as the size controlling agent.
The crystalline structure, morphology, and elemental composition of the prepared samples were characterized
by XRD, TEM, FE-SEM, and EDX mapping analysis. Owing to superior electronic properties of the
double perovskite, we used the prepared samples in the photocatalytic degradation of acid blue 113
(AB 113) under visible light irradiation. The photocatalytic degradation of AB 113 was nearly 72% after
120 min irradiation. Also, the effects of the photocatalyst amount and pH value of the dye solution were
studied. Investigation on the photocatalytic degradation mechanism using various radical scavenging
agents revealed that the photo-generated holes are the dominant oxidants for the degradation of
AB 113. The reusability experiment showed that the prepared sample has good recyclability even for
6 reaction cycles