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Photocatalytic behavior of Ba(Sb/Ta)2O6 perovskite for reduction of organic pollutants: Experimental and DFT correlation

Patil, Madhuri S., Kitchamsetti, Narasimharao, Mulani, Sameena R., Rondiya, Sachin R., Deshpande, Nishad G., Patil, Ranjit A., Cross, Russell W., Dzade, Nelson Y., Sharma, Kirankumar K., Patil, Pramod S., Ma, Yuan-Ron, Cho, Hyung Koun and Devan, Rupesh S. 2021. Photocatalytic behavior of Ba(Sb/Ta)2O6 perovskite for reduction of organic pollutants: Experimental and DFT correlation. Journal of the Taiwan Institute of Chemical Engineers 122 , pp. 201-209. 10.1016/j.jtice.2021.04.032

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Abstract

We have synthesized closely packed hexagonal 2D plates and clustered nanoparticle morphologies of Ba(Sb/Ta)2O6 (BSTO) perovskite via the polymerizable complex method for photocatalytic dye degradation activities. The BSTO crystallized in a hexagonal structure. The presence of Ba2+, Sb5+, Ta5+, and O2− chemical states identified from XPS confirmed the formation of mixed Ba(Sb/Ta)2O6 phase accompanied with a minor amount of TaOx. Furthermore, BSTO showed excellent photocatalytic activity for the degradation of various organic dyes. The kinetic studies revealed 65.9%, 77.3%, 89.8%, and 84.2%, of Crystal Violet (CV), Methylene Blue (MB), Rhodamine blue (RhB), and Methylene Orange (MO), respectively, after irradiation of 180 min without using a cocatalyst. The formation of and OH−surface radicals, which are believed to facilitate the degradation of the dyes, are unveiled through first-principles Density Functional Theory (DFT) calculations and scavenging studies. Our results suggest that BSTO holds promise as an excellent photocatalyst with better degradation efficiency for various organic dyes.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Additional Information: This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Publisher: Elsevier
ISSN: 1876-1070
Funders: EPSRC
Date of First Compliant Deposit: 12 May 2021
Date of Acceptance: 18 April 2021
Last Modified: 11 Jun 2021 13:21
URI: http://orca.cardiff.ac.uk/id/eprint/141254

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