Preparation method of magnetic carbon-covering nano material

Inactive Publication Date: 2016-09-28
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the particle size and distribution of the carbon-coated nano-metal particles prepared by this method are restricted by the nano-metal catalyst, and the late product will be accompanied by the formation of carbon nanotubes and amorphous carbon particles, and the separation from the substrate and catalyst carrier also needs to be solved. The problem

Method used

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  • Preparation method of magnetic carbon-covering nano material
  • Preparation method of magnetic carbon-covering nano material
  • Preparation method of magnetic carbon-covering nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1)Ni(L-asp)(H 2 O) 2 ·H 2 Preparation of O: NiCO 3 2Ni(OH) 2 ·xH 2 O, L-asp and H 2 O was mixed in a ratio of 1:1:200, and kept under heating and stirring at 95°C for 2.5 hours, until most of the powder was dissolved in water, then the heating and stirring were stopped. The insoluble matter in the solution was removed by filtration to obtain a clear solution, which was placed in an oven at 100°C for 1 day, and the green Ni(L-asp)(H 2 O) 2 ·H 2 O crystals, collected for later use.

[0054] (2)[Ni 2 (L-asp) 2 (bpy)]·CH 3 OH·H 2 Preparation of O crystal material: Ni(L-asp)(H 2 O) 2 ·H 2 O was added to the mixed solution of methanol and water, and after partial dissolution, continued to add a certain amount of 4,4'-pyridine under stirring conditions, so that the mass ratio of each substance in the final solution was Ni(L-asp)(H 2 O) 2 ·H 2 O:4,4'-pyridine:methanol:water=1:1.4:21.7:27.4. The solution was transferred to an autoclave, sealed, and crystalliz...

Embodiment 2

[0058] Prepare [Ni by step (1) and (2) in embodiment 1 2 (L-asp) 2 (bpy)]·CH 3 OH·H 2 O crystalline powder material.

[0059] The synthesized [Ni 2 (L-asp) 2 (bpy)]·CH 3 OH·H 2 The O crystal powder is lightly ground until there are no larger particles and spread on the bottom of the ceramic crucible. Place the ceramic crucible in the middle of the tube furnace, then remove the internal air of the tube furnace by vacuuming, and replace it with high-purity nitrogen. Repeat 3 times to ensure a sufficient anaerobic environment. The flow rate of nitrogen is controlled at 80ml per minute, and the heating rate is 5°C per second. First, stay at 150°C for 2 hours, and then pyrolyze at 600°C for 5 hours to obtain magnetic carbon. coated nanomaterials.

[0060] The prepared magnetic carbon-coated nanomaterials were characterized by transmission electron microscopy and magnetic properties.

Embodiment 3

[0062] Prepare [Ni by step (1) and (2) in embodiment 1 2 (L-asp) 2 (bpy)]·CH 3 OH·H 2 O crystalline powder material.

[0063] The synthesized [Ni 2 (L-asp) 2 (bpy)]·CH 3 OH·H 2 The O crystal powder is lightly ground until there are no larger particles and spread on the bottom of the ceramic crucible. Place the ceramic crucible in the middle of the tube furnace, then remove the internal air of the tube furnace by vacuuming, and replace it with high-purity nitrogen. Repeat 3 times to ensure a sufficient anaerobic environment. The flow rate of nitrogen is controlled at 80ml per minute, the heating rate is 5°C per second, first stay at 150°C for 2 hours, and then pyrolyze at 700°C for 5 hours to obtain magnetic carbon coated nanomaterials.

[0064] The prepared magnetic carbon-coated nanomaterials were characterized by transmission electron microscopy and magnetic properties.

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Abstract

The invention discloses a preparation method of a magnetic carbon-covering nano material, and belongs to the field of preparation of nanocarbon@metal composites. The preparation method of the magnetic carbon-covering nano material is characterized in that the magnetic carbon-covering nano material is obtained through carrying out high-temperature pyrolysis on a metal-organic framework compound in the atmosphere of inert protection. According to the preparation method, the metal-organic framework compound is utilized as a precursor, and the carbon-covering nano material with a uniform size is prepared through a one-step high-temperature pyrolysis process; and according to a product obtained through the method, the phase is single, the impurities are extremely few, the collection is particularly easy, the yield is high, the large-scale synthesis is facilitated, the product has quite good ferromagnetism, the dispersity is quite good, the response time is short, and the magnetic carbon-covering nano material has quite typical ferromagnetism hysteresis loop and relatively high saturation magnetization intensity, and is a kind of quite potential biomagnetic nano material.

Description

technical field [0001] The invention belongs to the field of preparation of nano-carbon@metal composite materials, and in particular relates to a preparation method of magnetic carbon-coated nano-materials. Background technique [0002] In the early 1980s, nanotechnology was born and gradually rose. It is a science that studies the laws of motion and interactions of material composition systems and technical problems in practical applications within the scale of 1-100nm. In recent years, nanotechnology has intersected with other disciplines, making it develop rapidly in the fields of medicine, biology, materials, and chemistry. Due to their small size effects, quantum effects, surface effects, etc., nanomaterials exhibit characteristics different from their bulk materials, such as light, heat, magnetism, electricity, and surface properties. They are used in magnetic fluids, structural ceramics, optical materials, It has a wide range of applications in electrical materials,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F9/30H01F1/00B82Y30/00B82Y40/00
CPCH01F1/0054B82Y30/00B82Y40/00B22F9/30B22F1/054B22F1/16
Inventor 范黎黎康子曦王荣明孙道峰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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