Morphologies and magnetism of AxB1-xFe2O4 self-assembled nanospheres. (June 2018)

• Record Type: Journal Article
• Authors: Ma, Jie; Chen, Bingkun; Yan, Luliang; Sun, Mengya
• Is Part Of: Materials research bulletin. Volume 102(2018)
• Page Start: 137
• Page End: 141
• Publication Date: 2018-06
• Subjects: Magnetism -- Microspheres -- Ferrite -- Solvothermal -- Nanomaterial; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2018.02.031
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Via given solvothermal approach, the morphologies and magnetic properties of bimetallic ferrite nanomaterials can be facilely modified by changing the type or content of the doped ions. Highlights: A modified solvothermal method are successfully applied to prepare bimetallic ferrite microspheres. The replaced ions coexist in same spinel lattice and cause its distortion. The morphologies and magnetic properties are affected by type and content of ions. As-prepared samples belong to paramagnetic materials with low coercivity. Abstract: A series of A x B1- x Fe2 O4 ( x = 0.05–0.50) (A, B as Zn 2+, Ni 2+, Co 2+ ) micro-nanospheres were prepared using a facile one-pot solvothermal method. All products are spinel structures with grain sizes of around 11–15 nm as characterised by using XRD. SEM and TEM images show that Ni x Zn1- x Fe2 O4 ( x = 0.05–0.50) are microspheres self-assembled by nanoparticles with an average diameter of 200–300 nm, but the sizes of Nix Co1-x FeO4 ( x = 0.10–0.50) and Zn x Co1- x Fe2 O4 ( x = 0.10–0.50) micro-nanospheres increase from 20 nm to 200 nm with increasing amounts of Ni 2+ and Zn 2+ . As-prepared A x B1- x Fe2 O4 samples are paramagnetic materials with coercivities of no more than 177.5 Oe. The morphologies and magnetism of A x B1- x Fe2 O4 could be adjusted by changing the amount of A 2+ and B 2+ .