Journal
JOURNAL OF RARE EARTHS
Volume 37, Issue 12, Pages 1279-1287Publisher
ELSEVIER
DOI: 10.1016/j.jre.2018.12.015
Keywords
Rare earth substitution; Perovskites; Sol-gel autocombustion; Structural properties; Photocatalysis
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Funding
- Council of Scientific and Industrial Research (CSIR) [01(02833)/15/EMR-II]
- University Grants Commission (UGC)
- DST Purse Grant-II
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Different rare earth substituted perovskites LaRExFe1-xO3 (where RE = Eu3+, Gd3+, Dy3+, Nd3+ and x = 0.02, 0.04, 0.06, 0.08, 0.1) with orthorhombic structure and narrow band gaps were successfully fabricated via sol-gel autocombustion method. All the substituted perovskites are found to exhibit excellent photocatalytic activity towards the oxidative degradation of dye molecules. An excellent increase in the rate constant values of pure perovskite (LaFeO3) photocatalytic reactions is observed with the substitution of rare earth metal ions. Best results are obtained for LaNd0.1Fe0.9O3 which exhibits around 7 times increase in the rate constant values for degradation reaction of SO (1.76 x 10(-1) min(-1)) and RBY (1.69 x 10(-1) min(-1)) dyes. (C) 2019 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.
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