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Hydrothermal preparation method for carbon cladded nanometer ferriferrous oxide particles

A carbon-coated ferric oxide and nanoparticle technology, which is applied in the preparation/purification of carbon, iron oxide/iron hydroxide, nanotechnology, etc., can solve the problems of large product particle size and complicated preparation process, and achieve the goal of preparation The method has the advantages of simple process, reversible lithium storage characteristics, and the effect of improving water solubility

Inactive Publication Date: 2012-11-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the above-mentioned methods are multi-step methods, the preparation process is complicated, and the product particle size is relatively large.

Method used

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  • Hydrothermal preparation method for carbon cladded nanometer ferriferrous oxide particles
  • Hydrothermal preparation method for carbon cladded nanometer ferriferrous oxide particles
  • Hydrothermal preparation method for carbon cladded nanometer ferriferrous oxide particles

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Weigh 0.9g of glucose and dissolve in 40ml of deionized water, weigh 1.212g of ferric nitrate and dissolve in 2ml of deionized water, quickly mix the above two solutions to form a solution, and use an ultrasonic device with a power of 400W for 15min to mix evenly . Take 30ml of the mixed solution and put it into a reaction kettle with polytetrafluoroethylene as the substrate, and react at a constant temperature of 180°C for 3h. After the reaction was completed, the reaction solution in the reactor was cooled to room temperature. Put the reaction solution into a centrifuge, centrifuge at a speed of 10000 r / min for 10 min, remove the supernatant and add deionized water, then centrifuge at a speed of 8000 r / min for 15 min, then remove the supernatant and add deionized water Finally, after centrifugation at a speed of 8000 r / min for 15 min, the supernatant was removed, and the precipitate obtained by centrifugation was redispersed in deionized water, and then freeze-dried ...

Embodiment 2

[0026] Weigh 0.9g of glucose and dissolve in 40ml of deionized water, weigh 1.212g of ferric nitrate and dissolve in 2ml of deionized water, quickly mix the above two solutions to form a solution, and use an ultrasonic device with a power of 400W for 15min to mix evenly . Take 30ml of the mixed solution and put it into a reaction kettle with polytetrafluoroethylene as the substrate, and react at a constant temperature of 190°C for 3h. After the reaction was completed, the reaction solution in the reactor was cooled to room temperature. Put the reaction solution into a centrifuge, centrifuge at a speed of 10000 r / min for 10 min, remove the supernatant and add deionized water, then centrifuge at a speed of 8000 r / min for 15 min, then remove the supernatant and add deionized water Finally, after centrifugation at a speed of 8000 r / min for 15 min, the supernatant was removed, and the precipitate obtained by centrifugation was redispersed in water, and after freeze-drying, a monod...

Embodiment 3

[0028]Weigh 0.9g of glucose and dissolve in 40ml of deionized water, weigh 1.212g of ferric nitrate and dissolve in 2ml of deionized water, quickly mix the above two solutions to form a solution, and use an ultrasonic device with a power of 400W for 15min to mix evenly . Take 37.5ml of the mixed solution and put it into a reaction kettle with polytetrafluoroethylene as the substrate, and react at a constant temperature of 190°C for 5h. After the reaction was completed, the reaction solution in the reactor was cooled to room temperature. Put the reaction solution into a centrifuge, centrifuge at a speed of 10000 r / min for 10 min, remove the supernatant and add deionized water, then centrifuge at a speed of 10000 r / min for 10 min, then remove the supernatant and add deionized water Finally, after centrifugation at a speed of 8000 r / min for 15 min, the supernatant was removed, and the precipitate obtained by centrifugation was redispersed in water, and monodisperse carbon-coated...

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Abstract

The invention discloses a c hydrothermal preparation method for carbon cladded nanometer ferriferrous oxide particles. The method comprises the following steps: mixing an glucose carbon source solution with a ferric nitrate solution; subjecting an obtained mixture to a hydrothermal reaction; collecting sediment through centrifugation after the hydrothermal reaction and dispersing the sediment in ionic water again; carrying out freeze-drying so as to obtain powder; and calcining the powder in a tubular furnace in an inert atmosphere so as to obtain the carbon cladded nanometer ferriferrous oxide particles. The nanometer particles have good stability, do not easily get agglomerated and have a particle size controllable within a range from 50 nm to 500 nm; and the preparation method is simple, safe and non-toxic, has high output and is applicable to industrial production and utilization. The carbon cladded nanometer ferriferrous oxide particles can be used in a wide variety of fields like magnetic materials, catalyst supporters, magnetic resonance imaging and targeting drug carriers; and the particles can also be used for a negative electrode material of an electrode of a novel lithium ion battery and show a reversible lithium storage property.

Description

technical field [0001] The invention relates to a hydrothermal preparation method of carbon-coated iron ferric oxide nanoparticles, which belongs to the composite material technology of carbon and metal oxides. Background technique [0002] Magnetic metal oxide nanoparticles have unique application value in the fields of industry, biomedicine and electronic information, mainly including in magnetic liquids, magnetic recording materials, catalysts, targeted drug carriers, magnetic hyperthermia, magnetic resonance imaging, sensors, lithium ion Applications such as batteries. [0003] The preparation methods of Fe3O4 nanoparticles mainly include co-precipitation method, microemulsion method, hydrothermal method, thermal decomposition method and sol-gel method. Among them, there are many factors affecting the particle size and magnetic properties of nanoparticles in the process of chemical co-precipitation method, the reaction process is not easy to control, and the product pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08C01B31/02H01F1/34B82Y30/00C01B32/05
Inventor 何春年吴珊赵乃勤师春生刘恩佐
Owner TIANJIN UNIV
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