Consequences of the calcination on the morphological, structural, optical, and catalytic properties of CuMgFe-layered double hydroxide for photo-fenton degradation

Author(s)

Serge, Nayara de Melo Costa ; Goncalves, Rosembergue Gabriel Lima ; Lima, Karla Virginia Leite ; Correales, York Estewin Serge ; de Aquino, Joao Mauricio Beghetto Tomaz ; Goncalves, Rogeria Rocha ; Hammer, Peter ; Nogueira, Raquel Fernandes Pupo

• Document type: Journal article
• Source: APPLIED CLAY SCIENCE; v. 268, p. 10-pg., 2025-05-01.

Abstract

This study explored the influence of calcination on Layered Double Hydroxides (LDH) applied as catalyst in Fenton and photo-Fenton processes evaluated during sulfamethoxazole (SMX) degradation. According to the findings, CuMgFe-layered double hydroxide underwent significant structural, optical, and catalytic transformations following thermal treatment at 400 degrees C and 650 degrees C. X-ray Diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS) analyses showed the formation of pure cuprous delafossites and cupric spinels. The use of the CuMgFe-layered double hydroxide treated at 400 degrees C and CuMgFe-layered double hydroxide treated at 650 degrees C in the Fenton process caused an increase in the solution pH, which subsequently inhibited the degradation of SMX, in contrast to LDH without calcination. CuMgFe-layered double hydroxide treated at 400 degrees C achieved 13 % and 18 % SMX degradation in Fenton and photo-Fenton reaction, while CuMgFe-layered double hydroxide treated at 650 degrees C resulted in 18 % and 29 %, respectively. Compared to LDH without calcination (26 % and 36 %), the lower degradation values of calcined catalysts were found to be significantly influenced by the pH increase of the suspensions (9.0-9.6). Despite the reduced SMX removal, calcined LDH exhibited intriguing structural and optical modifications, suggesting potential applications beyond degradation processes. (AU)

• FAPESP's process: 18/17517-0 - Layered double hydroxide as catalysts in heterogeneous photo Fenton process for degradation of drugs present in hospital effluent
• Grantee: Nayara de Melo Costa Serge
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 21/14230-4 - Iron-based layered double hydroxides as multifunctional catalysts for CO2 hydrogenation to light olefins (C2-C4): evaluation the effect of chemical composition and porosity on catalytic performance
• Grantee: Rosembergue Gabriel Lima Goncalves
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 18/12780-4 - Innovative decentralized and low cost treatment systems for optimal urban wastewater management
• Grantee: Raquel Fernandes Pupo Nogueira
• Support Opportunities: Regular Research Grants
• FAPESP's process: 21/08111-2 - Development of rare earth based light converters: luminescent markers, optical sensors, and amplifiers
• Grantee: Hermi Felinto de Brito
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 23/07220-8 - Development of Layered Double Hydroxide/Copper-Cysteamine Nanoparticles Systems for Environmental Applications: Pharmaceuticals Degradation, Pathogens Inactivation and Sensing
• Grantee: Nayara de Melo Costa Serge
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 23/05351-8 - Development of lanthanide-doped persistent luminescence perovskite oxide nanoparticles for bioimaging and security labeling
• Grantee: York Estewin Serge Correales
• Support Opportunities: Scholarships in Brazil - Post-Doctoral