Synthesis and Characterization of CoFe₂O₄ Hollow Spheres

Abstract

CoFe 2 O 4 hollow spheres with sizes ranging from 600 nm to 1 µm were prepared through hydrothermal treatment of an aqueous solution containing glucose, ammonium iron (II)

Size-controlled synthesis and magnetic properties of NiFe2O4 hollow nanospheres via a gel-assistant hydrothermal route

“…To the best of our knowledge, there have been only three reports on the synthesis of hollow nanospheres composed of ternary metal oxides. For instance, Chen and his coworkers demonstrated the preparation of CoFe 2 O 4 hollow spheres by hydrothermal reaction of a solution of metal oxide precursors and glucose, followed by calcination [15]. Tada et al reported the synthesis of hollow ferrite nanospheres with diameter of 220-340 nm by depositing ferrite shell layers on the surfaces of silica spheres by oxidation of Fe 2+ using NaNO 3 as an oxidizing agent in solution [16].…”

One-step synthesis of MFe2O4 (M=Fe, Co) hollow spheres by template-free solvothermal method

“…Chen et al [27] prepared NiFe 2 O 4 hollow nanospheres with diameter in the range of 90-180 nm via direct hydrothermal decomposition of a gel of Ni-Fe-EG (EG = ethylene glycol) in water solution. Chen and co-workers [28] The purpose of our study is to synthesize monodispersed purified hollow ferrite spheres in low temperature from EG solution with simple template free solvothermal method. Cobalt chloride and ferric chloride were used as cation sources in the reaction system.…”

Highly sensitive acetone gas sensor based on porous ZnFe2O4 nanospheres

“…Therefore, research on the novel sensing materials for further improving the performances of sensors is a hot topic. Spinel ferrites (AFe 2 O 4 , A=Zn, Ni, Cu, Cd, Co), in which the transition metal cation A 2+ is incorporated into the lattice of the parent structure of (Fe 2+ Fe 2 3+ O 4 ) [16], are already A c c e p t e d M a n u s c r i p t 4 widely applied in a variety of fields [17][18][19][20][21][22][23], which attributes to their environmental friendliness, low …”