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Prepn process and application of metal-carbon nanometer composite material

A composite material, carbon nanotechnology, applied in chemical instruments and methods, catalyst activation/preparation, other chemical processes, etc., can solve problems such as weak reducibility, and achieve the effects of simple method, short preparation period and low production cost

Inactive Publication Date: 2007-06-06
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, furfural and its derivatives have not been reported as a carbon source. Furfural has a reducing aldehyde group, which is easy to polymerize and carbonize under hydrothermal conditions, and has strong reducibility to metal gold, silver, copper, etc. Cobalt, nickel, etc. have weak reducibility

Method used

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  • Prepn process and application of metal-carbon nanometer composite material
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  • Prepn process and application of metal-carbon nanometer composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 0.3g Co(AC) 2 Add it into 30mL of deionized water, stir to dissolve, then pipette 0.5mL of furfural solution into it, stir evenly, place it in a 40mL stainless steel pressure-resistant reactor, react at 180°C for 15h, and filter, wash and dry the resulting precipitate. A brown powder was obtained. Observing the obtained sample microspheres with a scanning electron microscope, the size of the microspheres is 2-5 microns. The obtained powder was placed in a tubular heating furnace, heated to 700°C at a heating rate of 2°C / min in a high-purity nitrogen atmosphere, and kept for 3 hours to obtain a cobalt-carbon nanocomposite material, which was identified as metallic cobalt by X-ray powder. The specific surface area of ​​the sample is 339m 2 / g. ICP results showed that the mass percent content of metallic cobalt was 6.1%.

Embodiment 2

[0021] Weigh 0.3g Co(AC) 2 Add it to 15mL deionized water and 15mL ethylene glycol mixed solution, stir to dissolve, then pipette 0.5mL furfural solution and add it, stir evenly, put it in a 40mL stainless steel pressure-resistant reactor, and react at 180°C for 15h, the obtained precipitate After filtering, washing and drying, a brown powder was obtained. The sample obtained by scanning electron microscopy is a microsphere composed of about 50nm sheets, the size of the microsphere is 3-7 microns, and the specific surface area is 26m 2 / g. The obtained powder is placed in a tubular heating furnace, heated to 700°C at a heating rate of 2°C / min in a high-purity nitrogen atmosphere, and kept for 3 hours to obtain a cobalt-carbon nanocomposite material, which is identified as metallic cobalt by X-ray powder. It is observed by scanning electron microscope and transmission electron microscope that its morphology maintains the morphology of the precursor, but its size becomes small...

Embodiment 3

[0023] Weigh 0.3g Co(AC) 2 Add it into 30mL ethylene glycol mixed solution, stir to dissolve, then pipette 0.5mL furfural solution and add it, stir evenly, put it in a 40mL stainless steel pressure-resistant reaction kettle, react at 180°C for 15h, and the obtained precipitate is filtered, washed, After drying, a brown powder was obtained. Obtained samples obtained by scanning electron microscopy are small balls with a diameter of about 500 nm, and the dispersibility of the small balls is not very good. The obtained powder was placed in a tubular heating furnace, heated to 700°C at a heating rate of 2°C / min under a high-purity nitrogen atmosphere, and kept for 3 hours to obtain a cobalt-carbon nanocomposite material, which was identified as metallic cobalt and A mixture of cobalt oxides, mainly metallic cobalt. The specific surface area of ​​the sample is 309m 2 / g, the pore size distribution is 0.5nm. ICP results showed that the mass percentage of metallic cobalt was 11.7...

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Abstract

The present invention relates to preparation process and application of metal-carbon nanometer composite material. The present invention prepares metal-carbon nanometer composite material by using furfural or its derivative as carbon source and metal salt as the furfural polymerizing catalyst, and through a hydrothermal or solvent thermal process and a carbonizing process. Thus prepared metal-carbon nanometer composite material has controllable appearance, hollow structure and great specific surface area as well as homogeneous distribution of metal on the carbon carrier. The preparation process has the advantages of facile material, simple operation, short period, low cost, etc. and is suitable for industrial production. The obtained metal-carbon nanometer composite material is used as the precursor for high activity catalyst, adsorbent, high grade ink, etc.

Description

technical field [0001] The invention relates to a preparation method and application of nanomaterials, in particular to a method for preparing metal-carbon nanocomposite materials. Background technique [0002] Due to the large specific surface area and special metal-carbon interaction, metal-carbon nanocomposites show different characteristics from conventional metal-carbon composites, so they are used in highly active catalysts, adsorbents, advanced ink materials, supercapacitor materials, lithium batteries Materials, hard materials and precursors of metal carbides have shown strong application prospects. [0003] The preparation methods of metal-carbon nanocomposites usually include gas-phase methods, such as incomplete combustion and vapor deposition; solid-phase methods, such as high-energy ball milling, high-temperature pyrolysis of organic metal salts; liquid-phase methods, such as sol-gel methods, Co-precipitation method, etc. For the preparation of metal-carbon na...

Claims

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Application Information

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IPC IPC(8): B22F9/24C04B35/622B01J37/03B01J20/20B01J20/30
Inventor 邱介山邢丽梁长海
Owner DALIAN UNIV OF TECH
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