Synthesis and characterization of iron oxide nanoparticles dispersed in mesoporous aluminum oxide or silicon oxide

Annealing-dependent structural and magnetic properties of nickel oxide (NiO) nanoparticles in a silica matrix

“…These systems are useful for investigation of the relationship between the size of the particles, inter-particle interactions and macroscopic magnetic properties [36][37][38][39][40][41][42]. However, thus far no detailed studies have been carried out to investigate the effect of annealing at high temperatures on the magnetic properties of NiO nanoparticles in a silica matrix.…”

Solvent mediated surface engineering of α-Fe2O3nanomaterials: facet sensitive energy storage materials

“…When the Fe : EG ratio is increased to 1 : 4 the hysteresis behaviour changes which can be attributed to the closing of the pores by iron oxide. 47,48 The pore sizes obtained by the Barrett-Joyner-Halenda (BJH) method (shown in Fig. 6b) under the above mentioned conditions varied between 10 and 30 nm.…”

Synthesis of Fe2SiO4-Fe7Co3 Nanocomposite Dispersed in the Mesoporous SBA-15: Application as Magnetically Separable Adsorbent

“…Metal alloys and oxide nanocomposites containing Fe dispersed in ceramic matrices have been of great interest in the scientific community since these materials have a variety of applications [1,2] such as contrast enhancement in magnetic resonance images, gas sensors, magnetic fluids, magnetocaloric applications, magneto-optical data storage devices, magnetically separable adsorbents, among others [2][3][4][5]. The determining aspects in the physicochemical properties of these composites are related to the particle size distribution, morphology of particles, defects, purity of phases, and the fraction of atoms present on the surface compared to bulk atoms and the chemistry of the surface [2,6]. The main challenges are related to the synthesis of nanocomposites with defined shape, controlled composition, and adjustable interparticle distance [7].…”