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

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 tempe...

Full description

Saved in:
Bibliographic Details
Published in:Materials chemistry and physics 2021-01, Vol.257, p.123741, Article 123741
Main Authors: de Souza, Bruna G., Figueira, Gustavo, Carvalho, Maria H., Alcaraz-Gonzalez, Victor, Saldaña-Flores, Karla E., Godinho, Mário, de Oliveira, Adilson J.A., Kiminami, Ruth H.G.A., Ruotolo, Luís A.M., Urquieta-González, Ernesto A.
Format: Article
Language:English
Subjects:
Cobalt ferrites
CoFe2O4
Crystals
Degradation
Hydrothermal treatment
Ion migration
Lignin degradation
Magnetic measurement
Magnetic properties
Microwave-assisted hydrothermal treatment
Nanocrystals
Nanoparticles
Photo-Fenton
Room temperature
Unconventional coprecipitation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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. [Display omitted] •Novel unconventional coprecipitation procedure to obtain cobalt ferrites.•Room temperature and surfactant-free synthesis.•MW-assisted hydrothermal treatment with octahedral Co2+ migration to tetrahedral sites.•Superior incorporation of the highly active Fe3+ at the ferrite octahedral sites.•Magnetic and photo-Fenton active cobalt ferrites photocatalysts.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2020.123741