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Method for preparing ferrum series non-crystalline state nanometer simple substance

A nano-element, amorphous technology, applied in the field of inorganic nano-materials, can solve the problems of poor powder particle size distribution uniformity, low efficiency, harsh reaction conditions, etc., and achieve the effects of small product particle size, simple process and equipment, and simple equipment.

Inactive Publication Date: 2007-10-17
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the methods for preparing iron-based nano-elements mainly include soft chemical method, ultrasonic decomposition method, LB film technology assembly, sol-gel electrodeposition method, microemulsion method, mechanical alloying method, etc., and there are powders produced in these methods. Disadvantages such as poor particle size distribution uniformity, harsh reaction conditions, and low efficiency

Method used

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  • Method for preparing ferrum series non-crystalline state nanometer simple substance
  • Method for preparing ferrum series non-crystalline state nanometer simple substance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Prepare FeCl with a molar concentration of 0.1mol / L respectively 2 ethanol solution and KBH 4 Aqueous solution, accurately measure 0.1ml of KBH with a concentration of 0.1mol / L 4 Place the aqueous solution solution in a 1.5ml plastic centrifuge tube, add deionized water dropwise to 1ml, fasten the cap of the centrifuge tube and place it in an ultrasonic wave until a large number of bubbles appear in the solution, stop the ultrasound, take out the test tube, and open the top cover, and then quickly add 0.4ml, 0.1mol / L FeCl 2 Ethanol solution, buckle the test tube lid, quickly place the centrifuge test tube in a high-speed centrifuge, turn on the power, and adjust the acceleration of the centrifuge to 11G.

[0024] After reacting for 2-5 minutes, turn off the power, wait for the high-speed centrifuge to stop completely, take out the centrifuge test tube, a black precipitate will form at the bottom of the test tube, wash the precipitate with deionized water and alcohol f...

Embodiment 2

[0027] Prepare FeCl with a molar concentration of 0.2mol / L respectively 2 ethanol solution and KBH 4 Aqueous solution, wherein deionized water was added dropwise to 0.8ml, the acceleration of the centrifuge was adjusted to 12G, and other conditions and steps were exactly the same as in Example 1. The obtained product Fe powder is stored in absolute ethanol, and the structure and morphology of the product are characterized by XRD and TEM respectively. The obtained product has a diameter of about 12 nanometers, high product purity, and the crystal system of the product is the same as in Example 1.

Embodiment 3

[0029] Prepare NiCl with a molar concentration of 0.1mol / L respectively 2 ethanol solution and KBH 4 of aqueous solution. Other conditions and steps are exactly the same as in Example 1. Gained product Ni powder is preserved in absolute ethanol, and the structure and appearance of product are characterized by XRD and TEM respectively, as can be seen from Fig. 2, the product diameter that obtains is about 6 nanometers, and product purity is high, and product's The crystal system is the same as in Example 1.

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Abstract

The invention belongs to inorganic nanometer material field, especially relates to a method for preparing a ferrious noncrystalline nanometer simple substance, comprising the following steps: weighing two solids of A and B, respectively preparing solution B and solution A having concentration of 0.1-0.4mol / L, the mol concentration ratio of solution A and solution B is 1:1; adding deionized water in solution A, implementing ultrasonic concussion to generate mass air bubbles in the solution and when the air bubbles disappear, stopping the ultrasonic concussion and the reaction, then adding with the solution B to react in a centrifugal machine, wherein the reaction time is 2 -5 minutes, and finally getting black sediments, after washing to obtain the required product. The solid A is KBH4 powder, solid B is any one of FeCl2(or FeCl3), NiCl2.6H2O or CoCl2.6H2O etc. The solution A is KBH4 water solution, the solution B is any one of FeCl2( or FeCl3) ethanol solution, NiCl2 ethanol solution or CoCl2 ethanol solution etc. The invention has advantages of easily obtaining raw material, low cost and simple operation and equipment, small and even grain size of the product, is easy to industrialize, and can provide new approach and way for the synthesis of nanometer material.

Description

technical field [0001] The invention belongs to the field of inorganic nanometer materials, and in particular relates to a method for preparing an iron-based amorphous nanometer elemental substance. Background technique [0002] Nano-materials of iron-group metals [Ni, Fe, Co] are widely used soft magnetic materials and have excellent catalytic properties. The so-called "amorphous metal", also known as amorphous metal or metallic glass. It is different from general metals with a crystal structure, and is a metal or alloy solid without a three-dimensional periodic arrangement of atoms; that is, it does not have a long-range ordered crystal lattice arrangement beyond the range of several atomic distances. Around the 1930s, amorphous metals were prepared by evaporation or electrodeposition. However, due to the limitation of experimental conditions, the systematic and in-depth research on the nature and properties of its amorphous state has not been conducted. It was not unti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 刘心波吴庆生朱铁建庄凌孙冬梅
Owner TONGJI UNIV
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