Magnetic NiFe2O4/TiO2 heterostructures for the photocatalytic decontamination of glyphosate in water

被引：5

作者：

Verdi, Isadora Roberta ^{[1
]}

Maroli Neto, Alberto Jose ^{[1
]}

Garcia, Izabela Sara de Gois ^{[1
]}

Lenzi, Giane Goncalves ^{[2
]}

Villetti, Marcos Antonio ^{[3
]}

Alves, Odivaldo Cambraia ^{[4
]}

Fidelis, Michel Zampieri ^{[5
]}

da Rocha, Raquel Dalla Costa ^{[1
]}

Brackmann, Rodrigo ^{[1
]}

机构：

[1] Fed Univ Technol Parana UTFPR, Dept Chem, Via Conhecimento,Km 01, BR-85503390 Pato Branco, Parana, Brazil

[2] Fed Univ Technol Parana UTFPR, Dept Chem Engn, Doutor Washington Subtil Chueire,330, BR-84017220 Ponta Grossa, Parana, Brazil

[3] Fed Univ Santa Maria UFSM, Dept Phys, Ave Roraima, 1000, Camobi, BR-97105900 Santa Maria, RS, Brazil

[4] Fed Fluminense Univ UFF, Inst Chem, Dept Chem, R Outeiro S J Batista s-n, BR-24020150 Niteroi, RJ, Brazil

[5] State Univ Maringa UEM, Dept Chem Engn, Ave Colombo, 5790 Bloco D90-Zona 7, BR-87020680 Maringa, Parana, Brazil

来源：

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2024年 / 174卷

关键词：

Glyphosate; Magnetic heterojunctions; Visible-light photocatalysts; Nanostructured catalysts; FERRITE NANOPARTICLES; SHELL; CORE; DEGRADATION; NANOCOMPOSITES; DETOXIFICATION; TEMPERATURE; FABRICATION; TOXICITY; BIOASSAY;

D O I：

10.1016/j.mssp.2024.108205

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This work investigated the synthesis and photocatalytic performance of NiFe2O4/TiO2 heterostructures for the decontamination of glyphosate in water. The adapted Pechini method effectively produced NiFe2O4/TiO2 structures. Doping TiO2 with Fe and its association with NiFe2O4 promoted the formation of the rutile phase. FTIR analysis confirmed the presence of Fe3+ ions in tetrahedral sites and Fe3+ and Ni2+ ions in octahedral sites, supporting the formation of an inverted spinel-type structure. SEM-EDS analysis revealed non-homogeneous TiO2 coating on the magnetic structures. Pure oxides (NiFe2O4 and TiO2) displayed homogeneous atomic distribution. NiFe2O4/TiO2 demonstrated superior photocatalytic performance compared to individual oxides, attributed to decreased electron-hole pair recombination as evidenced by photoluminescence results. Sample NiFe2O4/TiO2 displayed photocatalytic activity in the decomposition reaction, leading to a significant increase in phosphate ion concentration by a factor of 4 within 90 min. The H2O2 addition enhanced glyphosate degradation by scavenging electrons, reducing recombination, and increasing hydroxyl radical formation. The concentration of phosphate ions increased by 96 times with the use of H2O2. The photostability test performed using the best catalyst indicated a decrease in the photoactivity from the second photocatalytic cycle onwards. The catalyst exhibited toxicity only for A. salina, suggesting its sensitivity to Fe and TiO2. No toxicity was observed in L. minor and L. sativa seeds.

引用

页数：15

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