A Simple Preparation Method of Fe3O4 Nanobelts and Octahedral Microcrystals
A nanobelt, fe3o4 technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as limitations, achieve low cost, excellent physical and chemical properties, purity and form are simple and controllable Effect
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Embodiment 1
[0017] Example 1: Fe 3 O 4 Preparation and characterization of nanoribbons.
[0018] First, 0.27g FeCl 3 .6H 2 O and 0.5 g of NaBH 4 Dissolved in 20 mL of deionized water. Then, the above two solutions are mixed, the pH value of the system is about 8, and the aqueous solution system containing Fe nanopowder (Fe-H 2 O). Finally, the above Fe-H 2 The O system mixture was transferred to the reaction kettle (the pH value of the reaction system was about 8 at this time), and the target product was obtained after hydrothermal reaction in an oven at 180 °C for 12 h. After observing the target product with a scanning electron microscope (SEM), it can be seen that the shape of the product obtained in this experiment is a ribbon (see figure 1 a), the width of the band is about 10 nm (see figure 1 b); EDS analysis results show that the chemical compositions of these nanoribbons are mainly Fe and O (see figure 1 c), according to the experimental data, it is preliminarily estimat...
Embodiment 2
[0022] Example 2: Fe 3 O 4 Preparation and characterization of octahedral crystallites.
[0023] First, 0.27g FeCl 3 .6H 2 O and 0.5 g of NaBH 4 Dissolved in 20 mL of deionized water. Then, the above two solutions are mixed, the pH value of the system is about 8, and an aqueous solution system containing Fe nanopowder is obtained after a rapid reaction. Next, Fe in the above system was separated by magnetic separation and added to 40 mL of NaOH aqueous solution with a concentration of 1 mol / L. Finally, it was transferred to the reaction kettle (the pH value of the reaction system was about 14 at this time), and the target product was obtained after hydrothermal reaction in an oven at 180°C for 12 hours. First, the product was observed by SEM, and the product obtained under the experimental conditions was octahedral particles with a particle size of about 1-4 μm (see figure 2 a and figure 2 b). Then, the phase analysis of the product was carried out by means of X-ray...
Embodiment 3
[0029] Example 3: Fe 3 O 4 Preparation of nanoribbons.
[0030] First, add 0.30 g of FeCl 3 .6H 2 O and 0.45g of NaBH 4 were dissolved in 20 mL of deionized water. Then, the above two solutions were mixed and reacted rapidly to obtain an aqueous solution system containing Fe nanopowder (Fe-H 2 O). Finally, the above Fe-H 2 The O system mixture is transferred to the reaction kettle, and the target product can be obtained after 24 hours of hydrothermal reaction in an oven at 180 °C. After observing the target product with a scanning electron microscope (SEM), it can be seen that the shape of the product obtained in this experiment is a band, and the width of the band is about 15 nm.
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