A novel synthesis route to obtain magnetic nanocrystalline cobalt ferrite with photo-Fenton activity

Autor(es)

de Souza, Bruna G. ^{[1, 2]} ; Figueira, Gustavo ^[3] ; Carvalho, Maria H. ^[4] ; Alcaraz-Gonzalez, Victor ^[5] ; Saldana-Flores, Karla E. ^[5] ; Godinho Jr, Mario ; de Oliveira, Adilson J. A. ^[4] ; Kiminami, Ruth H. G. A. ^[3] ; Ruotolo, Luis A. M. ^[2] ; Urquieta-Gonzalez, Ernesto A. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Res Ctr Adv Mat & Energy, C Postal 676, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Chem Engn, C Postal 676, BR-13565905 Sao Carlos, SP - Brazil

^[3] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, C Postal 676, BR-13565905 Sao Carlos, SP - Brazil

^[4] Univ Fed Sao Carlos, Dept Phys, C Postal 676, BR-13565905 Sao Carlos, SP - Brazil

^[5] Univ Guadalajara CUCEI, Blvd Marcelino G Barragan 1421, Guadalajara 44430, Jalisco - Mexico

• Tipo de documento: Artigo Científico
• Fonte: Materials Chemistry and Physics; v. 257, JAN 1 2021.
• Citações Web of Science: 3

Resumo

A novel unconventional coprecipitation procedure (UCP) followed by a simple and fast microwave-assisted hydrothermal (MAH) treatment was used to synthesize a new nanocrystalline magnetic cobalt ferrite (CoFe2O4/MAH) with photo-Fenton activity. The Co-ferrite nanoparticles were obtained at room temperature in the absence of surfactants and their photo-Fenton activity was evaluated through lignin degradation. It was found that microwave hydrothermal treatment is mandatory to obtain magnetic and photoactive Co-ferrite. According to XRD Rietveld refinements and FTIR, the photoactivity was mainly attributed to the Co2+ cation migration from octahedral to tetrahedral sites in the ferrite structure during the MAH treatment, leading, consequently, to a higher Fe3+ incorporation at octahedral sites, which strongly participate in the photo-Fenton degradation mechanism. The magnetic property of the CoFe2O4/MAH ferrite nanoparticles was confirmed by magnetometry and provided an easy catalyst separation. (AU)

• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 17/13769-1 - Materiais multiferróicos e ferroelétricos para conversores de energia: síntese, propriedades, fenomenologia e aplicações
• Beneficiário: José Antonio Eiras
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/24995-2 - Magnetismo em materiais multifuncionais
• Beneficiário: Adilson Jesus Aparecido de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 09/54082-2 - EMU: projeto para aquisição de um magnetômetro de amostra vibrante que utiliza como sensor um dispositivo supercondutor de interferência quântica acoplado (Squid-VSM) com circuito fechado de criogenia
• Beneficiário: Ernesto Chaves Pereira de Souza
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários