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Method for preparing three-dimensional communication type nano-hole golden sponge

A technology of nanopores and gold sponges, applied in the field of material science, to achieve wide application prospects, high specific surface area, and good pore dialysis rate

Inactive Publication Date: 2008-09-24
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Regarding the research on gold sponge, the Harvard University research group first adopted the method of corrosion of AuAg alloy with strong acid, and obtained a maximum specific surface area of ​​2m 2 / g, but this method is limited to the preparation of Au sponge films with a thickness usually less than 1 μm; the British research group then prepared porous materials of Au and its alloys by calcination, but the pore size is on the order of microns, resulting in a maximum specific surface area of ​​only 0.4 m 2 / g
At present, there are still few researches on obtaining gold nanomaterials with larger specific surface area, pore size and uniform distribution.

Method used

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  • Method for preparing three-dimensional communication type nano-hole golden sponge
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  • Method for preparing three-dimensional communication type nano-hole golden sponge

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Dissolve glucose in deionized water to make 20mL glucose aqueous solution with a concentration of 0.03M, place in a container with magnetic stirring and stir, add KOH aqueous solution with a concentration of 1M, and stir at a speed of 120r / min to adjust the pH of the glucose aqueous solution A value of 9 gave a homogeneous solution.

[0027] 80 μL of 0.05M HAuCl 4 The aqueous solution was added into the prepared aqueous glucose solution with a pipette, and then stirred at a speed of 120 r / min for 1 h, and left to stand to obtain monodisperse gold nanoparticles.

Embodiment 2

[0029] Dissolve glucose in deionized water to make 20mL glucose aqueous solution with a concentration of 0.03M, place in a container with magnetic stirring and stir, add NaOH aqueous solution with a concentration of 1M, and stir at a speed of 120r / min to adjust the pH of the glucose aqueous solution A value of 9 gave a homogeneous solution.

[0030] 80 μL of 0.05M HAuCl 4 The aqueous solution was added to the prepared aqueous glucose solution with a pipette, then continued to stir at a speed of 120r / min for 1h, and left to stand to obtain monodisperse gold nanoparticles, such as figure 1 shown.

Embodiment 3

[0032] Dissolve glucose in deionized water to make 20mL glucose aqueous solution with a concentration of 0.03M, place in a container with magnetic stirring and stir, add KOH aqueous solution with a concentration of 1M, and stir at a speed of 120r / min to adjust the pH of the glucose aqueous solution A value of 10 yields a homogeneous solution.

[0033] 80 μL of 0.05M HAuCl 4 The aqueous solution was added into the prepared aqueous glucose solution with a pipette, then stirred at a speed of 120 r / min, stirred for 1 hour, and left to stand to obtain gold nanowires.

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Abstract

A preparation method of three-dimensional communication type nanometer Au sponge is characterized in that glucose is used as reducing agent and wrapping agent, HAuCl4 as precursor, glucose and HAuCl4 react in alkali aqueous solution, and glucose is used to reduce Au from HAuCl4 by controlling pH value and concentration of glucose solution in reaction system. A three-dimensional communication type nanometer Au sponge with three-dimensional communication type nanometer hole and the macroscopically random shape and size as well as the network structure similar to that of sponge is obtained after treatment in the common heat treatment furnace, the maximum specific surface is 12.0 square meter per gram. The invention is a preparation method of three-dimensional communication type nanometer Au sponge which is easily operated without environmental pollution, thereby having the important meaning of development of Au nanometer material.

Description

technical field [0001] The invention belongs to the field of material science, in particular to a preparation method of a three-dimensional connected nanoporous gold sponge. Background technique [0002] Among noble metal materials, gold nanomaterials have their unique features. Gold is chemically inert, and bulk gold has almost no catalytic activity; however, it has been found that gold nanomaterials have extraordinary catalytic activity, which has led to a sharp increase in international research interest in gold as a catalytic material in recent years, for example, loaded on Gold nanoparticle catalysts supported by transition metal oxides have high catalytic activity for catalyzing CO oxidation and nitrogen oxide decomposition at low temperatures, and are effective in eliminating nitrogen oxides and CO in automobile exhaust gases. Due to the good biocompatibility of gold elements, gold nanomaterials can be used for the determination of biological markers and protein conc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08
Inventor 秦高梧裴文利任玉平左良
Owner NORTHEASTERN UNIV LIAONING