Method for preparing porous carbon loaded nano-metal through microwave assistance

A nano-metal and microwave-assisted technology is applied in the field of porous carbon-supported nano-metal oxides or nano-metal materials, and achieves great application prospects, low cost, and high monodispersity.

Inactive Publication Date: 2017-01-18
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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 porous carbon loaded nano-metal through microwave assistance
  • Method for preparing porous carbon loaded nano-metal through microwave assistance
  • Method for preparing porous carbon loaded nano-metal through microwave assistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Porous carbon loaded nano-Ni

[0029] Synthetic raw materials: glucose, urea, Ni(NO 3 ) 2` 6H 2 O (nickel nitrate)

[0030] (1) Weigh 1.5 g glucose, 2.5 g urea and 0.9 g Ni(NO 3 ) 2 9H 2 O in a 100 mL beaker, then place the beaker in a heatable magnetic stirrer. The temperature of the magnetic stirrer was raised to 120° C., and the stirring was continued for 10 min until the medicine in the beaker was in a molten state.

[0031] (2) Take out the molten liquid described in (1), put it into a microwave and heat it with a heating power of 300w, and heat it for 15 minutes to obtain a dark brown puffy solid.

[0032] (3) Grind the sample obtained in (2) with a mortar, and put it in a crucible, at 500 ° C, 5% H 2 / N 2 After heat treatment for 5 h under the same conditions, nano-Ni supported on porous carbon was obtained. XRD test showed that the particle size of Ni was 35 nm.

[0033] figure 1 It is the XRD pattern of nano-metal Ni supported on porous ca...

Embodiment 2

[0034] Example 2: Porous carbon loaded nano-Ni

[0035] Synthetic raw materials: glucose, urea, Ni(NO 3 ) 2` 6H 2 O (nickel nitrate)

[0036] (1) Weigh 1.5 g glucose, 2.5 g urea and 0.9 g Ni(NO 3 ) 2 9H 2 O in a 100 mL beaker, then place the beaker in a heatable magnetic stirrer. The temperature of the magnetic stirrer was raised to 120° C., and the stirring was continued for 10 min until the medicine in the beaker was in a molten state.

[0037] (2) Take out the molten liquid described in (1), put it into a microwave and heat it with a heating power of 500w, and heat it for 10 minutes to obtain a dark brown puffy solid.

[0038] (3) Grind the sample obtained in (2) with a mortar, and put it in a crucible, at 500 ° C, 5% H 2 / N 2 After heat treatment for 5 h under the same conditions, nano-Ni supported on porous carbon was obtained. XRD test showed that the particle size of Ni was 22 nm.

[0039] figure 2 It is the XRD pattern of nano-metal Ni supported on porous c...

Embodiment 3

[0040] Example 3: Porous carbon loaded nano-Ni

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

[0042] (1) Weigh 1.5 g glucose, 2.5 g urea and 0.9 g Ni(NO 3 ) 2 9H 2 O in a 100 mL beaker, then place the beaker in a heatable magnetic stirrer. The temperature of the magnetic stirrer was raised to 120° C., and the stirring was continued for 10 min until the medicine in the beaker was in a molten state.

[0043] (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.

[0044] (3) Grind the sample obtained in (2) with a mortar, and put it in a crucible, at 500 ° C, 5% H 2 / N 2 After heat treatment for 5 h under the same conditions, nano-Ni supported on porous carbon was obtained. XRD test showed that the particle size of Ni was 8 nm.

[0045] image 3 It is the XRD pattern of nano-metal Ni supported on porous carb...

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Abstract

The invention discloses a method for preparing porous carbon loaded nano-metal through microwave assistance and belongs to the technical field of nano material preparing. The method comprises the steps that porous carbon is formed through microwave heating, dehydration and carbonization in situ by utilizing the characteristic that ureal derivatives, carbohydrates and metal salt can form a uniform mixed solution at a certain temperature, and then the porous carbon is subjected to high-temperature heat treatment, so that the porous carbon loaded nano-metal material is prepared. According to the method, the loading type nano material which is controllable over loading amount, particle size, crystal phase and composition at the same time by changing the proportion of raw materials, the microwave duration, the power and other synthesis conditions. The whole process has the advantages of being easy to operate, environmentally friendly, low in cost and the like. The obtained porous carbon loaded nano-metal material has wide application prospects in industrial catalysis, water treatment, electrochemistry and other many aspects.

Description

technical field [0001] The invention provides a method for supporting nano metal oxides or nano metal materials on porous carbon, and belongs 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. Porous materials are materials with a n...

Claims

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Application Information

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IPC IPC(8): B22F9/22B82Y40/00C01B32/05C01G49/06B82Y30/00
CPCB22F9/22B22F2999/00B82Y30/00B82Y40/00C01G49/06B22F2201/013B22F2201/04
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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