Group V Elements (V, Nb and Ta) Doped CeO2 Particles for Efficient Photo-Oxidation of Methylene Blue Dye

Chanu, WC and Gupta, A and Singh, MK and Pandey, OP (2020) Group V Elements (V, Nb and Ta) Doped CeO2 Particles for Efficient Photo-Oxidation of Methylene Blue Dye. In: Journal of Inorganic and Organometallic Polymers and Materials, 31 (2). pp. 636-647.

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Abstract

A facile chemical route was adopted to synthesize doped CeO2 nanoparticles (NPs) with group V elements (V, Nb and Ta) as dopants. Successful incorporation of dopants was confirmed with higher angle shift of diffraction peaks in X-ray diffraction (XRD) patterns. As a result of doping, a red shift in the absorption edge has also been observed with significant decrement in optical band gap (3.3 � 2.7 eV). Surface chemical composition was also determined with the help of X-ray photoelectron spectroscopy in which presence of dopants supported the XRD results. The associated structural modifications (O-defects) has also been determined by Raman spectroscopy in order to understand the structure-optical co-relationship. Here, the detailed photodegradation of methylene blue dye revealed the effect of individual chemical characteristics of dopants on optical and electronic transitions between valence and conduction band edges of prepared CeO2. Further, the prepared Nb-doped CeO2 exhibited better photocatalytic efficiency (96.8) as compared to other samples with excellent reusability upto 4 continuous cycles. © 2020, Springer Science+Business Media, LLC, part of Springer Nature.

Item Type:	Journal Article
Publication:	Journal of Inorganic and Organometallic Polymers and Materials
Publisher:	Springer
Additional Information:	This copyright for this article belongs to Springer
Keywords:	Cerium oxide; Dyes; Energy gap; Niobium; Organic polymers; Red Shift; Reusability; Synthesis (chemical); X ray diffraction; X ray photoelectron spectroscopy, Chemical characteristic; Conduction band edge; Electronic transition; Methylene blue dye; Photocatalytic efficiency; Photodegradation of methylene blue; Structural modifications; Surface chemical composition, Tantalum compounds
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	30 Dec 2021 06:34
Last Modified:	30 Dec 2021 06:34
URI:	http://eprints.iisc.ac.in/id/eprint/67421

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