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

被引：12

作者：

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 ^{[6
]}

de Oliveira, Adilson J. A. ^{[4
]}

Kiminami, Ruth H. G. A. ^{[3
]}

Ruotolo, Luis A. M. ^{[1
]}

Urquieta-Gonzalez, Ernesto A. ^{[1
,2
]}

机构：

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

[2] Univ Fed Sao Carlos, Res Ctr Adv Mat & Energy, 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

[6] Univ Fed Goias, Inst Chem, Av Dr Lamartine P Avelar 1120, BR-75704020 Catalao, Go, Brazil

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2021年 / 257卷 / 257期

基金：

巴西圣保罗研究基金会;

关键词：

CoFe2O4; Unconventional coprecipitation; Microwave-assisted hydrothermal treatment; Photo-Fenton; Lignin degradation; CATION DISTRIBUTION;

D O I：

10.1016/j.matchemphys.2020.123741

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：6

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