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High dispersion metal nano granule and preparation thereof

A technology of metal nanoparticles and high dispersion, applied in the field of metal nickel, cobalt nanoparticles and their preparation, can solve the problems of poor thermal stability and high cost of raw materials, and achieve narrow size distribution, lower production costs, and cheap and easy-to-obtain raw materials Effect

Inactive Publication Date: 2008-09-10
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the disadvantages of high cost of raw materials, use of highly toxic organic solvents and poor thermal stability of the product.

Method used

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  • High dispersion metal nano granule and preparation thereof
  • High dispersion metal nano granule and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 2.3256g Ni(NO 3 ) 2 ·6H 2 O and 1.5006g Al(NO 3 ) 3 9H 2 O was added to 40ml deionized water to prepare a mixed salt solution, in which Ni 2+ The molar concentration is 0.2mol L -1 , Al 3+ The molar concentration is 0.1mol L -1; Prepare 40 milliliters of mixed alkaline solutions with 0.768g sodium hydroxide and 0.848g anhydrous sodium carbonate, wherein the sodium hydroxide molar concentration is 0.48mol L -1 , the concentration of anhydrous sodium carbonate is 0.2mol L -1 .

[0023] Quickly pour the prepared mixed salt solution and mixed alkali solution into the fully back-mixed liquid membrane reactor at room temperature and mix them, vigorously rotate and stir for 2 minutes, centrifuge the obtained suspension, and run it at 4000 rpm for 5 minutes , and washed 5 times with water to obtain a precipitate.

[0024] Dissolve 5.400g of glucose into 40ml of deionized water to prepare a solution, mix the obtained precipitate with the glucose solution, pour it into...

Embodiment 2

[0026] 4.2785g NiCl 2 ·6H 2 O and 1.4485g AlCl 3 ·6H 2 O was added to 30ml deionized water to prepare a mixed salt solution, in which Ni 2+ The molar concentration is 0.6mol L -1 , Al 3+ The molar concentration is 0.2mol L -1 30 milliliters of mixed alkaline solutions are prepared with 1.536g sodium hydroxide and 0.7013g sodium chloride, wherein the molar concentration of sodium hydroxide is 1.28molL -1 , the concentration of sodium chloride is 0.4mol L -1 .

[0027] Quickly pour the prepared mixed salt solution and mixed alkali solution into the fully back-mixed liquid membrane reactor at room temperature to mix, vigorously rotate and stir for 3 minutes, and centrifuge the obtained suspension (4000 rpm, 5 minutes each time)-wash with water After 4 cycles, a precipitate was obtained.

[0028] Dissolve 12.3228g of sucrose into 30ml of deionized water to prepare a solution, mix the prepared precipitate with the sucrose solution, pour it into the reaction kettle, add wat...

Embodiment 3

[0030] 10.5142g NiSO 4 ·6H 2 O and 7.5026g Al(NO 3 ) 3 9H 2 O was added to 50ml deionized water to prepare a mixed salt solution, in which Ni 2+ The molar concentration is 0.8mol L -1 , Al 3+ The molar concentration is 0.4mol L -1 50 milliliters of mixed alkaline solutions are prepared with 3.840g sodium hydroxide and 4.2620g sodium sulfate, wherein the sodium hydroxide molar concentration is 1.92mol L -1 , the concentration of sodium sulfate is 0.6mol L -1 .

[0031] Quickly pour the prepared mixed salt solution and mixed alkali solution into the fully back-mixed liquid membrane reactor at room temperature to mix, vigorously rotate and stir for 3 minutes, and centrifuge the obtained suspension (4000 rpm, 5 minutes each time)-wash with water After 4 cycles, a precipitate was obtained.

[0032] Dissolve 28.800g of glucose into 50ml of deionized water to prepare a solution, mix the prepared precipitate with the glucose solution, pour it into the reaction kettle, add wa...

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Abstract

The invention provides a highly dispersed metal nickel and cobalt nanoparticle which is prepared by a hydrotalcite-like compound / carbon nano-compound precursor and a preparation method thereof. In the preparation method, the compound precursor of the hydrotalcite-like compound and the carbon is prepared firstly, sugar molecules are introduced during the crystallization process of the hydrotalcite-like compound as a carbon source, the crystallization of the hydrotalcite-like and the carbonization of the sugar molecules are carried out simultaneously in certain proper reaction conditions, thus forming the hybrid compound product of the hydrotalcite-like and the carbon. A metal oxide is reduced to the metal particles by utilizing the carbon in the compound during the temperature increase process of the procedure. As the compound precursor is characterized by hybrid and adjustable composition, the size of the obtained metal particles is 8 to 25nm and is controllable, the size distribution is narrow, and the particles have no clustering. As the carbon has the reducibility, the additional reductant does not need to be introduced during the reaction process, and the reduction reaction can be fully carried out.

Description

technical field [0001] The invention belongs to the field of metal nano material preparation. It specifically relates to metal nickel and cobalt nanoparticles and a preparation method thereof. The metal particles obtained by the method have the characteristics of high dispersion, controllable size, narrow size distribution and good stability. Background technique [0002] As important metal materials, nickel and cobalt are widely used in magnetic recording, magnetic fluid, catalysis, sensing, biomedicine and other fields. Nanostructured materials are reduced in size (at least in one dimension) to the order of nanometers (1 nm = 10 -9 m), so it has a large specific surface area and a large number of surface atoms. Therefore, this type of material can show differences from bulk materials in terms of force, heat, electricity, magnetism, optical properties, and surface-interface reactivity. unique nature. For example: small size effect, surface effect, quantum effect, etc., r...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 项顼李峰白璐邹鲁
Owner BEIJING UNIV OF CHEM TECH
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