ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Synthesis of nanoceria from salophen metal complex and employed in photocatalytic degradation of malachite green

Srabanti Ghosh, Tapas Mallik, Mahendra Nath Roy, and Deepak Ekka

Department of Chemistry, Cooch Behar Panchanan Barma University, Coochbehar, India

E-mail: ekadeepak@yahoo.in

Received: 2 November 2023  Accepted: 26 February 2024

Abstract:

CeO₂ nanoparticles are attracting more attention from researchers because of their free-radical scavenging properties and ability to interchange between Ce⁴⁺ and Ce³⁺ redox state. Here, the Ce(IV) metal complex has been synthesized from the Salophen Schiff base ligand by the refluxing method and characterized using UV–VIS, FT-IR, ¹H-NMR, and conductivity. Then, the complex was employed as a precursor to synthesize CeO₂ nanoparticles by the solid-state thermal decomposition method. The structure (shape and size), properties, and morphology of the nanoparticle have been identified by FT-IR, XRD, FESEM, and EDAX techniques. The nanoparticle was employed to check the photocatalytic activity against Malachite Green dye degradation, where the effect have been made by varying pH value, dye concentration, catalyst concentration, reaction temperature, H₂O₂ concentration, and different sources of light. As a source of light direct sunlight and UV radiation (UV-365 and UV-254 nm) were used. The degradation kinetics followed the pseudo-first-order kinetic model with activation energy 39 kJ mol⁻¹.

Keywords: Transition metal complex; Salicylaldehyde; Ortho phenylene diamine; Ceria Nanoparticles; Photocatalyst; Organic dye (malachite green)

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-024-03394-6

Chemical Papers 78 (7) 4329–4346 (2024)