TITLE:
Preparation and Photocatalytic Properties of LnBaCo2O5+δ (Ln = Eu, Gd, and Sm)
AUTHORS:
Bingqian Han, Yuxiu Li, Nan Chen, Dongyang Deng, Xinxin Xing, Yude Wang
KEYWORDS:
Double-Perovskite, LnBaCo2O5+δ, Photocatalysis, Congo Red
JOURNAL NAME:
Journal of Materials Science and Chemical Engineering,
Vol.3 No.4,
April
21,
2015
ABSTRACT: A new type of photocatalytic material, double-perovskite oxides, LnBaCo2O5+δ (Ln = Eu, Gd, and Sm)
was synthesized via a conventional solid-state reaction process using Ln2O3, BaCO3 and Co2O3 as
raw materials. X-ray diffraction results show that the crystalline structures are a pure orthorhombic
lattice and are consistent with LnBaCo2O5+δ microparticles. The photocatalytic activity of
the LnBaCo2O5+δ (Ln = Eu, Gd, and Sm) powders was further demonstrated in the degradation of
Congo red (CR) under ultraviolet light irradiation with the dye solution concentration of 25 or 50
mg·L-1. The double-perovskite oxides LnBaCo2O5+δ show a certain photocatalytic activity during
the degradation of CR under ultraviolet light, which means that they are one kind of the promising
photocatalytic materials for the degradation of the azo dyes.