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Method for preparing carbon coated nano metal material using biological material-starch as substrate

A biomaterial and nano-metal technology, applied in the petroleum industry, coke ovens, etc., can solve the problems of many by-products and complex processes, and achieve the effect of easy process, low equipment requirements, and easy parameter control.

Inactive Publication Date: 2004-12-15
CHANGZHOU INST OF DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of complex process and many by-products in the preparation of carbon-coated nanomaterials, the purpose of the present invention is to provide a kind of low-cost and easy-to-obtain biological material-starch as the substrate, and adopt the reduction temperature control carbonization technology to prepare carbon-coated nanomaterials. The method of coating metal nanomaterials is to prepare a complex of starch and metal oxides through a series of operations, and then carry out temperature-controlled carbonization and pyrolysis of this complex in a reducing atmosphere (hydrogen) to obtain a large amount of carbon-coated metal nanomaterials

Method used

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  • Method for preparing carbon coated nano metal material using biological material-starch as substrate
  • Method for preparing carbon coated nano metal material using biological material-starch as substrate

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Weigh 2.00 g of soluble starch, add it to a small beaker (50 ml) containing 5 ml of deionized water, and stir it into a paste with a glass rod. Then weigh 0.10g Fe(NO 3 ) 3 9H 2 O and dissolve it in 50ml deionized water, then slowly add 0.1mol / L NaOH with a molar ratio of 3:1 to this solution to obtain Fe(OH) 3 Precipitation, the Fe(OH) 3 The precipitate was added to the starch paste obtained above, and the tan paste was obtained after being fully stirred, put into an oven and dried at 100°C for 2 hours, and the dried sample was ground into a fine powder with a mortar.

[0029] The above-mentioned fine powder of 1.00g is put into quartz boat, then places the center of the quartz reaction tube (diameter 30mm, length 600mm) in the tubular carbonization furnace; 3 / min rate into the reaction tube, and then at a rate of 5 °C / min, the carbonization furnace was heated to 900 °C and kept at a constant temperature for 4 hours. After the carbonization reaction, switch the h...

Embodiment 2

[0031] Weigh 20.00 g of soluble starch, add it into a small beaker (100 ml) containing 30 ml of deionized water, and stir it into a paste with a glass rod. Then weigh 1.00g Fe(NO 3 ) 3 9H 2 O and dissolve it in 50ml of deionized water, slowly add 0.1mol / L NaOH with a molar ratio of 3:1 into this solution to generate Fe(OH) 3 Precipitation, the Fe(OH)3 The precipitate was added to the above starch paste, and after being fully stirred to obtain a tan paste, it was put into an oven and dried at 100°C for 2 hours, and the dried sample was ground into a fine powder with a mortar.

[0032] Put 1.00 g of the above-mentioned fine powder into a quartz boat, then place it in the center of a quartz reaction tube (30 mm in diameter, 600 mm in length) in a tubular carbonization furnace, and then feed hydrogen into the reaction tube (20 cm 3 / min), then raise the temperature of the carbonization furnace to 300°C at a rate of 5°C / min, and keep the temperature constant for 1h, then heat th...

Embodiment 3

[0034] Weigh 20.00 g of soluble starch, add it into a small beaker (100 ml) containing 30 ml of deionized water, and stir it into a paste with a glass rod. Then weigh 1.00g Fe(NO 3 ) 3 9H 2 O, join in 50ml of deionized water, then slowly add 0.1mol / L NaOH with a molar ratio of 3:1 to generate Fe(OH) 3 Precipitation, the Fe(OH) 3 The precipitate was added to the above starch paste, and the tan paste was obtained after being fully stirred, and dried in an oven at 100°C for 2 hours, and the dried sample was ground into a fine powder with a mortar.

[0035] 2.00 g of the above fine powder was put into a quartz boat, and then placed in the center of a quartz reaction tube (diameter 30 mm, length 600 mm) in a tubular carbonization furnace. Then the hydrogen was injected at 20cm 3 The flow rate of / min is passed into the reaction tube, and the temperature of the carbonization furnace is raised to 900°C at a rate of 7.5°C / min and kept at a constant temperature for 4 hours; 3 / mi...

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Abstract

The present invention belongs to the field of the crossed nano carbon material and biological material technology, and relates to the temperature control carbonizing process for preparing carbon coated nano material under hydrogen atmosphere with starch as precursor material. Starch as carbon source precursor and ferric hydroxide prepared with ferrite nitrate are mixed homogeneously and the mixture is dried and ground to obtain material pre-mixture. The material pre-mixture is carbonized under reduction amtosphere and controlled temperature to prepare carbon coated nano material material. The present invention has low cost, simple process, controllable condition and other advantags, and the product may be large scale produced and widely used in high density magnetic record material, magnetic fluid nuclear magnetic resonant imaging and other fields.

Description

technical field [0001] The invention belongs to the intersecting technical field of carbon nanomaterials and biological materials, and relates to a method for preparing carbon-encapsulated nanomaterials (Carbon encapsulated nanomaterials) by using starch as a matrix and adopting a reduction carbonization process. Background technique [0002] For the method of preparing carbon-coated metal nanomaterials by reduction carbonization using biological material-starch as the substrate, there are no corresponding reports at home and abroad. [0003] With the rapid development of science and technology, "nanotechnology" as a new concept has caused a worldwide shock, which will bring brand-new changes to the technical field. Due to the special structure and peculiar physical and chemical properties of nanomaterials, it has attracted extensive attention of researchers from various countries and has become a new research hotspot. Carbon nanoscience research began with the discovery of...

Claims

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Application Information

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IPC IPC(8): C08K3/10C08L3/02C10B57/04
Inventor 邱介山安玉良
Owner CHANGZHOU INST OF DALIAN UNIV OF TECH
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