Encrustation of cobalt doped copper ferrite nanoparticles on solid scaffold CNTs and their comparison with corresponding ferrite nanoparticles: a study of structural, optical, magnetic and photo catalytic properties

Abstract

CoxCu1−xFe2O4 nanoparticles and their structural, optical, magnetic and catalytic comparison with CNTs encrusted CoxCu1−xFe2O4 nanocomposites.

Reduction of p-nitrophenol to p-aminophenol using an efficient, cheap and simple technique to prepare spinel ferrites: A comparative study

“…The XRD patterns was used to identify the crystal structure for the different spinel ferrite samples prepared as shown in Figure (2). It was obvious that the pure copper ferrite sample diffraction pattern confirming the formation of copper ferrite with peaks evident at (35.86 o , 34.72 o , 62.16 o and 29.9 o) and some minor hematite impurities evident at (33.15 o , 54 o and 24.1 o ) ) (Singh et al, 2015;2011;Zakiyah et al, 2015;Zhang et al, 2014) from this diffraction pattern the calculated crystallite size for copper ferrite was around 40 nm. Also, it was clear that the diffraction pattern of the copper ferrite sample prepared using 2wt% PAA, which confirm the formation of copper ferrite with peaks evident at (35.86 o , 34.72 o , 62.16 o and 29.9 o ) ) and some hematite impurities evident at (33.15 o , 54 o and 24.1 o ) (Singh et al, 2015;2011;Zakiyah et al, 2015;Zhang et al, 2014) and copper oxide as tenorite phase at (35.55 o and 38.73 o ) (Bakhtiari and Darezereshki, 2011;Darezereshki and Bakhtiari, 2011) and minor sodium chloride impurities from washing due to its gel like texture when dispersed in water which are evident from its main peak at 31.7 o , also from this diffraction pattern the calculated crystallite size for copper ferrite was around 10.4 nm, and the diffraction pattern of the copper ferrite sample prepared using 2wt% PAA, which confirm the formation of copper ferrite with peaks evident at (35.86 o , 34.72 o , 62.16 o and 29.9 o ) (Singh et al, 2015;Singh et al, 2011;Zakiyah et al, 2015;Zhang et al, 2014) and some hematite impurities evident at (33.15 o , 54 o and 24.1 o ) (Singh et al, 2015;Singh et al, 2011;Zakiyah et al, 2015;Zhang et al, 2014) and copper oxide as tenorite phase at (35.55 o and 38.73 o ) (Bakhtiari and Darezereshki, 2011;Darezereshki and Bakhtiari, 2011;Sarkar and Dolui, 2015) and minor sodium chloride impurities from washing due to its gel like texture when dispersed in water which are evident from its main peak at 31.7 o , also from this diffraction pattern the calculated crystallite size for copper ferrite was around 10.4 nm which is slightly different from the diffraction pattern of the copper ferrite sample prepared using 2wt% PVP, which confirm the formation of copper ferrite with peaks evident at (35.86o, 34.72 o , 62.16 o and 29.9 o ) and some hematite impurities evident at (33.15 o , 54 o and 24.1 o )…”

CuxCo1-xFe2O4 (x = 0.33, 0.67, 1) Spinel Ferrite Nanoparticles Based Thermoplastic Polyurethane Nanocomposites with Reduced Graphene Oxide for Highly Efficient Electromagnetic Interference Shielding

“…The decrease in the saturation magnetization can be attributed to the lower magnetic moment of Cu 2+ (1 ) than Co 2+ (3 ). Thus, the magnetic moment in the B-sublattice was sequentially decreased with the increase in copper substitution, which results in lower magnetic moment of copper substituted spinel ferrite nanoparticles [ 59 ]. Similar results were noticed by other researchers [ 57 , 58 , 59 ].…”

“…Thus, the magnetic moment in the B-sublattice was sequentially decreased with the increase in copper substitution, which results in lower magnetic moment of copper substituted spinel ferrite nanoparticles [ 59 ]. Similar results were noticed by other researchers [ 57 , 58 , 59 ]. The remanent (M r ) magnetization values were 3.2 emu/g, 0.48 emu/g, and 0 emu/g for CuCoF1, CuCoF2, and CuF3 sample, respectively.…”

Structural characterization and magnetic properties of undoped and copper-doped cobalt ferrite nanoparticles prepared by the octanoate coprecipitation route at very low dopant concentrations

“…These observed trends in the variation of M s can be justied by Neel's twosublattice magnetization model. 32,61,62 According to this model, magnetization (in m B ) is given by M (m B ) ¼ M B À M A , where M A and M B are the net magnetic moments of A (tetrahedral) and B (octahedral) sites, respectively. The magnetic moment of Cu 2+ (1 m B ) is less than that of Co 2+ (3 m B ).…”

“…Several methods 6,7,[22][23][24]26,32,33 have been used to synthesize nano-structured mixed copper-cobalt ferrites. These methods include the microwave assisted sol-gel, 6 co-precipitation, 7,24 sol-gel, 22,23 ceramic, 26 microemulsion 32 and so chemistry methods.…”