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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. ORCID:, 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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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
Advanced Research Computing @ Cardiff (ARCCA)
Additional Information: This is an open access article under the CC BY license (
Publisher: Elsevier
ISSN: 1876-1070
Funders: EPSRC
Date of First Compliant Deposit: 12 May 2021
Date of Acceptance: 18 April 2021
Last Modified: 06 Jan 2024 02:19

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