Metal aerogel with high specific surface area and preparation method thereof

A high specific surface area, airgel technology, applied in the direction of airgel preparation, chemical instruments and methods, metal material coating technology, etc., can solve the problems of high metal density, difficult to obtain airgel, etc., and achieve high specific surface area Effect

Inactive Publication Date: 2016-09-28
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because on the one hand, the research on the preparation of metal aerogels is still in its infancy, and there are few documents

Method used

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  • Metal aerogel with high specific surface area and preparation method thereof
  • Metal aerogel with high specific surface area and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0031] Example 1:

[0032] A method for preparing a metal aerogel with a high specific surface area includes the following steps:

[0033] Step 1. Weigh 1g of microcrystalline cellulose and 49g of 1-allyl-3-methylimidazole chloride salt (98% purity) in a beaker and place them in an oil bath at 80°C for 4 hours to completely dissolve the cellulose. Then place the beaker in a vacuum drying oven at 80°C for 2 days; take the beaker out of the drying oven and add EtOH / H 2 O solution regenerates the gel to prepare a cellulose aerogel; the EtOH / H 2 The volume fraction of EtOH in O solution is 80%;

[0034] Step two, weigh out 0.05g PdCl 2 In a beaker, add 45mL ethanol (EtOH) and 5mL1mol·L -1 HCl is placed in an ultrasonic cleaner to ultrasonically dissolve to obtain PdCl 2 Sensitizing solution; put cellulose aerogel in PdCl 2 Perform sensitization treatment in the sensitizer solution, take it out after 1 day, and rinse with deionized water to remove the PdCl enriched on the surface of the c...

Example Embodiment

[0038] Example 2:

[0039] A method for preparing a metal aerogel with a high specific surface area includes the following steps:

[0040] Step 1. Prepare cellulose aerogel using the method in Example 1;

[0041] Step 2: Prepare 100mL 0.1mol·L separately -1 PdCl 2 Solution and SnCl 2 Solution, put the prepared cellulose aerogel in SnCl 2 And PdCl 2 Soak in the solution for 1 day, then rinse with deionized water;

[0042] Step 3. Place the cellulose aerogel treated in step 2 in a Cu electroless plating solution, and perform electroless plating at room temperature. Change the Cu electroless plating solution every two days and repeat the cycle until the solution becomes non-free Color to obtain Cu / cellulose composite aerogel; Cu electroless plating solution formula is: sodium citrate 15g / L, boric acid 30g / L, anhydrous copper sulfate 10g / L and sodium hypophosphite 30g / L;

[0043] Step 4. Weigh 4.6g of LiOH and 15g of urea into a beaker, then add 80.4mL of deionized water and stir to comple...

Example Embodiment

[0045] Example 3:

[0046] A method for preparing a metal aerogel with a high specific surface area includes the following steps:

[0047] Step 1. Add 1g of microcrystalline cellulose to 50mL LiOH / urea solution, dissolve microcrystalline cellulose at -22℃, and add EtOH / H after the dissolution is complete 2 O solution regenerates the gel to prepare a cellulose aerogel; the EtOH / H 2 The volume fraction of EtOH in the O solution is 80%; the LiOH / urea solution is prepared by weighing 4.6g of LiOH and 15g of urea in a beaker, and then adding 80.4mL of deionized water and stirring to completely dissolve LiOH / Urea solution;

[0048] Step 2: Prepare 100mL 0.1mol·L separately -1 PdCl 2 Solution and SnCl 2 Solution, put the prepared cellulose aerogel in SnCl 2 And PdCl 2 Soak in the solution for 1 day, then rinse with deionized water;

[0049] Step 3. Place the cellulose aerogel treated in step 2 in the Ag electroless plating solution, and perform electroless plating at room temperature. Chang...

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Abstract

The invention discloses metal aerogel with a high specific surface area and a preparation method thereof. The method comprises the steps that (1) cellulose aerogel is placed in a sensitizing solution to be soaked and then is washed with water; (2) the treated cellulose aerogel is soaked in a metal chemical plating solution for chemical plating, and metal/cellulose composite aerogel is obtained; (3) the metal/cellulose composite aerogel is placed in a LiOH/urea solution, the process of removing a cellulose aerogel template is conducted at a low temperature, and a nanometer porous metal solution is obtained; and (4) the prepared nanometer porous metal solution is washed with water, then is subjected to solvent exchange with acetone and is dried, and the metal aerogel with the high specific surface area is obtained. The method adopting the cellulose aerogel as the template for preparing the metal aerogel with the high specific surface area is provided for the first time. The cellulose aerogel has a high specific surface area and is of a pore structure suitable for chemical plating. Meanwhile, the template is easy to remove after the chemical plating, and reference is provided for preparation of metal aerogel with other templates.

Description

technical field [0001] The invention belongs to the technical field of airgel material preparation, and in particular relates to a metal airgel with a high specific surface area and a preparation method thereof. Background technique [0002] Airgel is a star material that has emerged in recent years. Due to its high porosity, specific surface area, and low apparent strength, density, and refractive index, it is widely used in intense laser research target materials, heat insulation materials, and storage materials. Energy materials, catalytic materials, adsorption materials, Cerenkov threshold detectors and other fields have shown good application prospects. Metal aerogels combine many superior properties of metal materials and porous airgel materials, including low density, high porosity, high electrical / thermal conductivity, good catalytic activity and high strength / weight ratio; its representative It is a limit form of metal, and has great application prospects in many f...

Claims

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Application Information

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IPC IPC(8): C23C18/34C23C18/40C23C18/44C22C1/08B01J13/00
CPCB01J13/0091C22C1/08C23C18/1641C23C18/1644C23C18/1648C23C18/1657C23C18/34C23C18/40C23C18/44
Inventor 赵海波王朝阳付志兵袁磊杨曦米睿瞿静周小草钟铭龙
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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