Double perovskite nanostructured Dy2CoMnO6 an efficient visible-light photocatalysts: synthesis and characterization

Chanda, S and Maity, R and Saha, S and Dutta, A and Sinha, TP (2021) Double perovskite nanostructured Dy2CoMnO6 an efficient visible-light photocatalysts: synthesis and characterization. In: Journal of Sol-Gel Science and Technology .

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Abstract

The double perovskite oxide Dy2CoMnO6 (DCMO) has been synthesized by the sol�gel citrate method in the form of nanoparticles with an average particle size of 110 ± 5 nm as obtained from TEM measurement. The Rietveld refinement of the X-ray diffraction (XRD) pattern suggests monoclinic P21/n crystal structure. The band gap of the material of 1.93 eV is obtained from the UV�vis diffuse reflectance spectrum. The X-ray photoemission spectroscopic study reveals the multiple oxidation states of Co and Mn in DCMO. The photocatalytic behavior of DCMO is evaluated by the photodegradation of rhodamine-B (Rh-B) under the visible light irradiation. The results indicate that DCMO nanoparticles exhibit remarkable photocatalytic efficiency by degrading the Rh-B almost 98 in 4 h. The Mott�Schottky experiment suggests the p-type semiconducting nature of DCMO. We have also schematically represented the possible photocatalytic reaction with the band edge positions of DCMO with respect to the reactive oxygen species formation potential. The electrical properties and the charge carrier dynamics of the material are investigated using the alternating current impedance spectroscopy in a wide range of temperature and frequency. The activation energy of 0.31 eV obtained from the temperature dependence Dc conductivity suggests the p-type polaronic conduction in DCMO. Figure not available: see fulltext. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

Item Type:	Journal Article
Publication:	Journal of Sol-Gel Science and Technology
Publisher:	Springer
Additional Information:	The copyright for this article belongs to Springer
Keywords:	Activation energy; Cobalt metallography; Crystal structure; Dysprosium compounds; Energy gap; Light; Manganese metallography; Nanoparticles; Particle size; Perovskite; Photocatalytic activity; Photodegradation; Rhodamine B; Rhodium compounds; Rietveld refinement; Sols; Spectroscopic analysis; Synthesis (chemical); Temperature distribution, Alternating current impedance spectroscopy; Diffuse reflectance spectrum; Photocatalytic behaviors; Photocatalytic efficiency; Photocatalytic reactions; Synthesis and characterizations; Visible-light irradiation; Visible-light photocatalysts, Manganese compounds
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	21 Nov 2021 16:27
Last Modified:	21 Nov 2021 16:27
URI:	http://eprints.iisc.ac.in/id/eprint/69924

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