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Method for preparing supported nano-metal material through microwave-assisted carbon template method

A nano-metal, microwave-assisted technology, applied in nanotechnology, nanotechnology, metal processing equipment and other directions, can solve the problems of poor dispersion, serious pollution, and high cost of stencil agents, achieving low cost, simple synthesis route, and huge application prospects. Effect

Inactive Publication Date: 2017-03-08
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] All in all, the traditional synthesis methods of porous oxide-loaded nano-metal materials often have problems such as difficult control of nano-particle size, poor dispersion, high cost of template agents, and serious pollution in post-processing.
In addition, traditional synthesis methods cannot be widely used in the preparation of various nano-metals or oxides due to the limitation of preparation methods.

Method used

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  • Method for preparing supported nano-metal material through microwave-assisted carbon template method
  • Method for preparing supported nano-metal material through microwave-assisted carbon template method
  • Method for preparing supported nano-metal material through microwave-assisted carbon template method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Silicon oxide loaded nano-Ni

[0034] Synthetic raw materials: glucose, urea, silica sol, water, Ni(NO 3 ) 2` 6H 2 O (nickel nitrate)

[0035] (1) Weigh 1.5 g glucose, 2.5 g urea, 2 g silica sol, 5 g water and 0.9 g Ni(NO 3 ) 2 9H 2 O in a 100mL beaker, ultrasonically stirred for 10min until the drug in the beaker was dissolved.

[0036] (2) Take out the molten liquid described in (1), put it into a microwave and heat it with a heating power of 800w, and heat it for 3 minutes to obtain a dark brown puffy solid.

[0037] (3) Grind the sample obtained in (2) with a mortar, put it in a crucible, and bake it in air at 500°C for 5 hours to obtain nano-nickel oxide supported on silicon oxide.

[0038] (4) At 550°C, 5%H 2 / N 2 After heat treatment for 4 h under the same conditions, the silicon oxide-supported nano-metal nickel was obtained, and the XRD test showed that the particle size of Ni was 5 nm.

[0039] figure 1 It is the XRD pattern of metal Ni s...

Embodiment 2

[0040] Example 2: Alumina loaded nano-Ni

[0041] Synthetic raw materials: glucose, urea, aluminum sol, water, Ni(NO 3 ) 2` 6H 2 O (nickel nitrate)

[0042] (1) Weigh 1.5 g glucose, 2.5 g urea, 1 g aluminum sol, 5 g water and 0.9 g Ni(NO 3 ) 2 9H 2 O in a 100mL beaker, ultrasonically stirred for 10min until the drug in the beaker was dissolved.

[0043] (2) Take out the melt described in (1), put it into a microwave and heat it with a heating power of 700w, and heat it for 10 minutes to obtain a dark brown puffy solid.

[0044] (3) Grind the sample obtained in (2) with a mortar, put it in a crucible, and bake it in air at 500°C for 5 hours to obtain nano-nickel oxide supported on alumina.

[0045] (4) At 650°C, 5%H 2 / N 2 After heat treatment for 4 h under the same conditions, the aluminum oxide-supported nano-metal nickel was obtained, and the XRD test showed that the particle size of Ni was 10 nm.

[0046] figure 2 It is the XRD pattern of aluminum oxide loaded n...

Embodiment 3

[0047] Example 3: Lanthanum oxide loaded nano-NiO

[0048] Synthetic raw materials: glucose, urea, lanthanum nitrate, water, Ni(NO 3 ) 2` 6H 2 O (nickel nitrate)

[0049] (1) Weigh 1.5g of glucose, 2.5g of urea, 0.42g of lanthanum nitrate, 5g of water and 0.2g of Ni(NO 3 ) 2 9H 2 O in a 100 mL beaker, ultrasonically stirred for 10 min until the drug in the beaker was dissolved.

[0050] (2) Take out the molten liquid described in (1), put it into a microwave and heat it with a heating power of 700w, and heat it for 5 minutes to obtain a dark brown puffy solid.

[0051] (3) Grind the sample obtained in (2) with a mortar, put it in a crucible, and bake it in air at 500°C for 5 hours to obtain nano-nickel oxide supported by lanthanum oxide.

[0052] image 3 is the XRD pattern of the prepared lanthanum oxide-loaded metal NiO.

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Abstract

The invention discloses a method for preparing a supported nano-metal material through a microwave-assisted carbon template method, and belongs to the technical field of nano-material preparation. The method comprises the following steps: forming a homogeneous solution in water by virtue of saccharides, urea, a precursor of an oxide carrier, and metal salts, and uniformly distributing the metal salts in a mixed liquid; and after that, carbonizing the saccharides by virtue of microwave heating to obtain a carbon-coated oxide carrier and nano-metals, uniformly distributing metal active components in porous carbon simultaneously, then carrying out high-temperature treatment in air to obtain an oxide carrier-supported nano-metal oxide, and then carrying out high-temperature heat treatment under a reducing atmosphere to obtain a porous carbon-supported nano-metal oxide or a nano-metal material. According to the method disclosed by the invention, the supported nano-material with simultaneously-controllable supporting capacity, particle size, crystalline phase and composition can be obtained through changing synthesis conditions of raw material proportion, microwave time length, power and the like. The whole process has the advantages of being simple to operate, green and environment-friendly, low in cost and the like.

Description

technical field [0001] The invention provides a method for preparing loaded nano metal oxides or nano metal materials by a microwave-assisted carbon template method, belonging to the technical field of nano material preparation. Background technique [0002] Nanomaterials refer to solid materials composed of extremely fine grains with characteristic dimensions on the order of nanometers (~100nm). Nanomaterials have many properties that conventional materials do not have, including optical properties, electromagnetic properties, thermodynamic properties, quantum mechanical properties, etc. Due to these properties, nanomaterials are widely used in lubrication, optoelectronics, magnetic recording, catalysis and other fields. However, due to their high surface energy, nanoparticles are very prone to spontaneous aggregation, which greatly limits the nanoeffects of nanomaterials and reduces their application fields and effects. Therefore, nanomaterials often need a carrier. Porou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00B82Y30/00B22F1/054
CPCB22F9/24B82Y30/00B82Y40/00B22F1/054B22F9/22B22F2999/00C04B35/6286C04B2235/3227C04B2235/3229C04B35/6267C04B2235/3418C04B35/62805C08L3/02C08L1/28B22F2202/11C08L5/00B22F2201/01B22F2301/15C08L1/08
Inventor 姜兴茂曹静远王非梁帅仝雪张忠南冯健王海峰
Owner CHANGZHOU UNIV
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