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Preparation method of conductive powder of Ag-wrapped mesoporous SiO2

A conductive powder and mesoporous technology, which is used in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc. The effect of dosage, simple operation and convenient and easy-to-obtain raw materials

Inactive Publication Date: 2017-04-26
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Gold, silver, copper, and aluminum are common conductive metals, among which gold and silver are chemically stable and have good electrical conductivity, but because gold and silver are too expensive, their use is limited

Method used

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  • Preparation method of conductive powder of Ag-wrapped mesoporous SiO2
  • Preparation method of conductive powder of Ag-wrapped mesoporous SiO2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) The mesoporous SiO 2 Ultrasound the powder in water for 0.5h to obtain a homogeneous solution;

[0021] (2) Dissolve silver nitrate in water and add SiO 2 The solution was ultrasonically mixed, and then stirred for 2 h to obtain solution A.

[0022] (3) Ultrasonic dissolution of oleic acid and ethylene glycol to obtain solution B, the molar ratio of oleic acid to silver nitrate is 1:1.

[0023] (4) Add solution B to solution A, then stir for 1 h, then add deionized water with a molar ratio of 1:1 to silver nitrate to obtain solution C.

[0024] (5) After the solution C was stirred for 2 hours, it was suction-filtered and washed several times with deionized water, and dried in a drying oven for 2 hours to obtain solid D.

[0025] (6) Put the solid D into a corundum ceramic boat, transfer it to a tube furnace, pass in argon, then raise the temperature to 500°C at a rate of 2°C / min, keep it warm for 2h, and cool to room temperature to obtain the target product .

...

Embodiment 2

[0029] (1) The mesoporous SiO 2 Ultrasound the powder in water for 1h to obtain a homogeneous solution;

[0030] (2) Dissolve silver nitrate in water and add SiO 2 The solution was ultrasonically mixed, and then stirred for 4 h to obtain solution A.

[0031] (3) Potassium oleate and ethanol were mixed and ultrasonically dissolved to obtain solution B, and the molar ratio of potassium oleate to silver nitrate was 10:1.

[0032] (4) Add solution B to solution A, then stir for 4 hours, then add deionized water with a molar ratio of 50:1 to silver nitrate to obtain solution C.

[0033] (5) After the solution C was stirred for 1 h, it was suction filtered and washed several times with deionized water, and then put into a drying oven to dry for 12 h to obtain solid D.

[0034] (6) Put the solid D into a corundum ceramic boat, transfer it to a tube furnace, blow in nitrogen, then raise the temperature to 600°C at a rate of 2°C / min, keep it warm for 2h, and cool to room temperature...

Embodiment 3

[0037] (1) The mesoporous SiO 2 Ultrasound the powder in ammonia water for 0.8h to obtain a uniform solution;

[0038] (2) Dissolve silver nitrate in water and add SiO 2 The solution was ultrasonically mixed, and then stirred for 2 h to obtain solution A.

[0039] (3) Mix oleic acid with ethanol and dissolve it ultrasonically to obtain solution B. The molar ratio of oleic acid to silver nitrate is 5:1, and the molar ratio of oleic acid to potassium oleate and oleic acid is 1:1. mix.

[0040] (4) Add solution B to solution A, then stir for 2 hours, then add deionized water with a molar ratio of 25:1 to silver nitrate to obtain solution C.

[0041] (5) After the solution C was stirred for 0.5 h, it was suction-filtered and washed several times with deionized water, and dried in a drying oven for 6 h to obtain solid D.

[0042] (6) Put the solid D into a corundum ceramic boat, transfer it to a tube furnace, blow in nitrogen, then raise the temperature to 550°C at a rate of 2°...

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Abstract

The invention discloses a preparation method of conductive powder of Ag-wrapped mesoporous SiO2. The preparation method comprises the steps of: adopting mesoporous SiO2 powder as a carrier, adopting silver salt as a precursor, adding oleic acid to form uniform oleate inclusions, and carrying out thermal decomposition on the uniform oleate inclusions at 500 to 600 DEG C in a protective atmosphere to obtain Ni / SiO2 conductive powder. The prepared Ag particles are less than 20 nm, are uniformly dispersed on the mesoporous SiO2 carrier, and have good electrical conductivity. The preparation process does not need a reducing agent, is green and environmental friendly, can obtain raw materials conveniently and easily, is simple in operation, and achieves the requirements of industrialization.

Description

technical field [0001] The invention relates to an Ag-wrapped mesoporous SiO 2 The invention discloses a method for preparing conductive powder, which belongs to the technical field of material preparation in the energy industry. Background technique [0002] Gold, silver, copper, and aluminum are common conductive metals. Among them, gold and silver are chemically stable and have good electrical conductivity. However, because gold and silver are too expensive, their use is limited. Coating silver onto inorganic powder to make a composite material can greatly reduce the amount of silver used. In addition, mesoporous materials have the characteristics of extremely high specific surface area, regular and ordered pore structure, narrow pore size distribution, and continuously adjustable pore size. Silicon-based mesoporous materials have the advantages of narrow pore size distribution, regular pore structure, and high specific surface area. They are easy to modify and research...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B1/16
CPCH01B1/16H01B13/00
Inventor 张腾李巍婷张心愿魏颖温翠莲唐电
Owner FUZHOU UNIV
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