Investigation on the formation, structural and photocatalytic properties of mixed Mn-Zn ferrites nanoparticles embedded in SiO2 matrix

被引：71

作者：

Dippong, Thomas ^{[1
]}

Levei, Erika-Andrea ^{[2
]}

Toloman, Dana ^{[3
]}

Barbu-Tudoran, Lucian ^{[3
]}

Cadar, Oana ^{[2
]}

机构：

[1] Tech Univ Cluj Napoca, Fac Sci, 76 Victoriei St, Baia Mare 430122, Romania

[2] INCDO INOE 2000, Res Inst Analyt Instrumentat, 67 Donath St, Cluj Napoca 400293, Romania

[3] Natl Inst Res & Dev Isotop & Mol Technol, 67-103 Donath St, Cluj Napoca 400293, Romania

来源：

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS | 2021年 / 158卷

关键词：

Manganese-zinc ferrite; Thermal behavior; Crystalline phase; Photocatalysis; MAGNETIC-PROPERTIES; MANGANESE;

D O I：

10.1016/j.jaap.2021.105281

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The structure, morphology and photocatalytic features of the Mn-Zn ferrite nanoparticles embedded in SiO2 matrix produced by a modified sol-gel synthesis were investigated. The synthesis consists of mixing the metal nitrates, 1,4-butanediol and tetraethylorthosilicate, formation of the SiO2 matrix by gelation, formation of the metallic succinate precursors by heating the gel up to 200 degrees C and formation of the ferrite system by thermal treatment at higher temperatures. The formation of Mn-, Zn- and Fe-succinate precursors up to 200 degrees C and their decomposition into ferrites up to 400 degrees C was confirmed both by thermal analysis and Fourier-transform infrared spectroscopy. The X-ray diffraction provided information on the crystalline phases, crystallite size and lattice constant, while the morphology of the samples was investigated by transmission electron microscopy. The crystallite size increased (30.5-53.4 nm), while the energy band gap of the samples decreased (2.09-1.33 eV) with the increase of the Mn content in the ferrite; thus, the amount of manganese nitrate used in the synthesis could be an easy tailoring approach of the mixed Mn-Zn ferrites. All samples showed sonophotocatalytic activity, being able to degrade Rhodamine B under visible light irradiation, Mn0.3Zn0.7Fe2O4@SiO2 sample having the best sonophotocatalytic performance.

引用

页数：8