A study on growth formation of nano-sized magnetite Fe₃O₄ via co-precipitation method

Growth Mechanism and Electrical and Magnetic Properties of Ag–Fe3O4 Core–Shell Nanowires

“…By contrast, coprecipitation technology overcomes the disadvantages of high reaction temperature, high pressure, time consuming, or the organic solvent use. 37,38 Moreover, the stability of AgNWs under these fabrication conditions is secure. Nevertheless, no experimental works are available on the growth mechanism of Ag−Fe 3 O 4 core−shell nanowires, which is unfavorable for controlling the resulting structure.…”

“…Recently, Li et al used a facile coprecipitation method to fabricate Ag–Fe 3 O 4 core–shell nanowires which could be highly aligned by an external magnetic field. By contrast, coprecipitation technology overcomes the disadvantages of high reaction temperature, high pressure, time consuming, or the organic solvent use. , Moreover, the stability of AgNWs under these fabrication conditions is secure.…”

“…Particularly, when the PVP concentration increased to a certain extent, due to the extremely strong structure induction effect, a small amount of Fe 3 O 4 nanorods with spindle-like tips coated on AgNWs were observed in the system. We speculate that the particular stabilization and structure induction of PVP promote the growth of Fe 3 O 4 crystals on the surface of AgNWs and cause the formation of the resultant Ag-Fe 3 O 4 nanowires with a uniform and perfect core-shell structure.The effects of technological conditions (1) The effects of reaction temperatureIt is well known that temperature is an important factor for morphology-controlling of Fe 3 O 4 nanoparticles 37. Left: T1-T5) depicts the FESEM images of the products obtained at 40 °C, 55 °C, 70 °C, 85 °C, and 100 °C while maintaining the other parameters constant, respectively.…”

Porous 3D carbon decorated Fe3O4 nanocomposite electrode for highly symmetrical supercapacitor performance

“…Fe 3 O 4 nanoparticles were synthesized using coprecipitation method as described in our previous work. 28 The preparation processes of the Fe/HC nanocomposite included a hydrothermal carbonization reaction 24 and a chemical activation process. Glucose was used as a carbon source to form hydrochar outer-shell coating on Fe 3 O 4 nanoparticles.…”

Use of Low-Cost Magnetic Materials Containing Waste Derivatives for the (Photo)-Fenton Removal of Organic Pollutants

“…For the preparation of MNP–BBS, coprecipitation synthesis was applied, adding BBS molecules to stabilize the MNP and avoid natural oxidation. Although some of the main problems relative to the establishment of the optimal experimental conditions for the preparation of magnetic materials (i.e., Fe(II)/Fe(III) ratio, pH, temperature, presence or absence of molecular oxygen) have been considered and discussed in the literature [30,31,32], some questions are still open. For instance, an excess of Fe(III), if present during MNP–BBS synthesis, can be excluded from the crystalline framework of the magnetite/maghemite phase and can form an amorphous, undefined hydroxo phase, imparting a red shadow to the typically brilliant black colour of magnetite/maghemite.…”