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Gold nanoparticle / graphite alkyne composite membrane, preparation method and application thereof

A gold nanoparticle and gold nanoparticle technology, applied in the fields of catalysis, materials, chemistry, and environment, can solve the problems of inability to completely degrade azo dyes, unfavorable recycling and reuse, and limit the efficiency of degrading azo dyes, and achieve excellent catalytic efficiency. , the effect of simple process

Inactive Publication Date: 2012-02-15
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, advanced oxidation technology (advanced oxidation process) has been successfully used to degrade azo dyes, but due to technical limitations, this method cannot completely degrade high-concentration azo dyes in practical applications (R.A.Torres, J.I.Nieto, E . Combet. Appl. Catal. B: Environ., 2008, 80, 168-175.)
TiO 2 and ZnO nanoparticles are widely used to degrade azo dyes, but TiO 2 The recombination of electron-hole pairs with ZnO is fast, and their band gap is wide, and they can only absorb ultraviolet light. These factors limit their efficiency in degrading azo dyes. At the same time, these nanoparticles are powdery substances, which are not conducive to Recycling and Reuse

Method used

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  • Gold nanoparticle / graphite alkyne composite membrane, preparation method and application thereof
  • Gold nanoparticle / graphite alkyne composite membrane, preparation method and application thereof
  • Gold nanoparticle / graphite alkyne composite membrane, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Add 453.6 microliters of gold-containing compound chloroauric acid aqueous solution (0.44 mmol, 149 mg, 0.1 mol / L), 19.76 mg of coating agent sodium citrate (0.0672 mmol), and 1.9 mg of reducing agent to 35 milliliters (mL) of water. Sodium borohydride (0.0503 mmol), graphdiyne film (grown on copper sheet, 4 mg, film area 4 cm 2 ), stirring at 25°C for reduction reaction for 5 hours, the reducing agent sodium borohydride in situ reduces the gold-containing compound chloroauric acid, and the gold nanoparticles are modified on the graphyne membrane. After the reaction, the graphdiyne membrane is taken out and washed with secondary water After washing, the gold nanoparticle / graphyne composite film (ie, AuNPsGDF) (6.7 mg) provided by the present invention was obtained.

[0032] The gold nanoparticle / graphyne composite film (that is, Au NPsGDF) is composed of gold nanoparticles and graphyne film combined by electrostatic stabilization, gold nanoparticles are distributed on t...

Embodiment 2

[0044] To 35 milliliters of water, add 453.6 microliters of gold-containing compound chloroauric acid aqueous solution (0.44 mmol, 149 mg, 0.1 mol / liter), 19.76 mg of coating agent sodium citrate (0.0672 mmol), 1.9 mg of reducing agent sodium borohydride (0.0503 mmol), graphdiyne film (growth on copper sheet, 4 mg, film area is 4cm 2 ), stirring at 5°C for reduction reaction for 5 hours, sodium borohydride in-situ reduction of chloroauric acid, gold nanoparticles modified on the graphyne membrane, after the reaction, the graphyne membrane was taken out, and washed with secondary water to obtain the present invention A gold nanoparticle / graphyne composite film (ie AuNPsGDF) (5 mg) is provided.

[0045] The gold nanoparticle / graphyne composite film (that is, Au NPsGDF) is composed of gold nanoparticles and graphyne film combined by electrostatic stabilization, gold nanoparticles are distributed on the surface of graphyne film, and the mass of gold nanoparticles and graphyne film...

Embodiment 3

[0049] Add 453.6 microliters of gold-containing compound chloroauric acid aqueous solution (0.44 mmol, 149 mg, 0.1 mol / liter), 19.76 mg of coating agent sodium citrate (0.0672 mmol), and 1.9 mg of reducing agent sodium borohydride to 35 ml of water successively (0.0503 mmol), graphdiyne film (growth on copper sheet, 4 mg, film area is 4cm2 ), carried out reduction reaction at 30 DEG C for 5 hours, sodium borohydride in situ reduced chloroauric acid, gold nanoparticles were modified onto the graphyne membrane, after the reaction was finished, the graphdiyne membrane was taken out, and washed with secondary water to obtain the present invention A gold nanoparticle / graphyne composite film (ie AuNPsGDF) (6 mg) is provided.

[0050] The gold nanoparticle / graphyne composite film (that is, Au NPsGDF) is composed of gold nanoparticles and graphyne film combined by electrostatic stabilization. The gold nanoparticles are distributed on the surface of the graphyne film. The mass ratio is...

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Abstract

The invention discloses a gold nanoparticle / graphite alkyne composite membrane, a preparation method and application thereof. The gold nanoparticle / graphite alkyne composite membrane provided by the invention comprises gold nanoparticle and graphite alkyne membrane that are combined through static stabilization effect, wherein the gold nanoparticles are distributed on a surface of the graphite alkyne. The method comprises following step that using the graphite alkyne as a carrier, an aqueous solution of gold contained compound, a cladding agent and a reducing agent are mixed uniformly in water to conduct a reduction reaction, so as to obtain the gold nanoparticle / graphite alkyne composite membrane. A technology of the method is simple, green and environment-friendly; the obtained composite membrane is stable in air, has good catalysis efficiency, an azo dye degrading photocatalysis speed of 0.556 mg / h per gram of gold nanoparticle / graphite alkyne under sunshine and a rate constant of 0.01885 min <-1>. The composite membrane has potential application prospects in fields of chemistry, catalysis, environment and material, etc.

Description

technical field [0001] The invention relates to the fields of chemistry, material, catalysis and environment, in particular to a gold nanoparticle / graphyne composite film and its preparation method and application. Background technique [0002] Carbon materials have excellent physical and chemical properties, and the modification of metal nanoparticles on the surface of carbon materials has important applications in nanoscience and technology. The successful preparation of graphyne (G.X.Li, Y.L.Li, H.B.Liu, Y.B.Guo, Y.J.Li, D.B.Zhu.Chem.Commun., 2010, 46, 3256-3258.) has given birth to a new carbon material "family". a member of. Graphdiyne has a special electronic structure, large specific surface and porous structure, excellent chemical, light and thermal stability and electrical properties. The application of metal nanoparticles in catalysis, especially in photocatalytic degradation of azo dyes, has received extensive attention (A.Henglein.Chem.Rev., 1989,89,1861-1873.L...

Claims

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Application Information

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IPC IPC(8): B01J23/52C02F1/30
Inventor 李玉良刘辉彪李勇军李国兴
Owner INST OF CHEM CHINESE ACAD OF SCI