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Preparation method of silver phosphate/graphene nanocomposite

A nanocomposite material, graphene technology, applied in the field of nanocomposite materials and photocatalysis, can solve problems such as poor stability and low photocatalytic efficiency, and achieve the effects of improving stability, improving photoelectric conversion efficiency, and inhibiting photocorrosion

Inactive Publication Date: 2014-02-26
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to address the above problems and provide a method for preparing silver phosphate / graphene nanocomposites, which solves the problems of low photocatalytic efficiency and poor stability in the prior art

Method used

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  • Preparation method of silver phosphate/graphene nanocomposite
  • Preparation method of silver phosphate/graphene nanocomposite
  • Preparation method of silver phosphate/graphene nanocomposite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 25 mg of graphene oxide and dissolve it in 50 ml of deionized water, and obtain a graphene oxide dispersion with a concentration of 0.5 mg / ml after ultrasonic dispersion; weigh 0.0711 g of disodium hydrogen phosphate solid and dissolve it in deionized water, and after ultrasonic dispersion is uniform Obtain a disodium hydrogen phosphate solution with a concentration of 0.01 mol / L; weigh 0.2548 g of silver nitrate solid and dissolve it in the above graphene oxide dispersion, wherein the concentration of silver nitrate is 0.03 mol / L, and obtain a precursor solution after magnetic stirring A. Slowly add 50 ml of the above-mentioned disodium hydrogen phosphate solution to 50 ml of precursor solution A under continuous magnetic stirring and dark conditions. After the addition is completed, the mixed solution is stirred at room temperature for 0.5 hours, After centrifugation, wash with deionized water and absolute ethanol several times, and dry in vacuum; weigh 0.05 g of ...

Embodiment 2

[0021] Take 25 mg of graphene oxide and dissolve it in 50 ml of deionized water, and obtain a graphene oxide dispersion with a concentration of 0.5 mg / ml after ultrasonic dispersion; weigh 0.3555 g of disodium hydrogen phosphate solid and dissolve it in deionized water, and after ultrasonic dispersion is uniform Obtain a disodium hydrogen phosphate solution with a concentration of 0.05 mol / L; weigh 1.274 g of silver nitrate solid and dissolve it in the above graphene oxide dispersion, wherein the concentration of silver nitrate is 0.15 mol / L, and obtain a precursor solution after magnetic stirring A. Slowly add 50 ml of the above-mentioned disodium hydrogen phosphate solution to 50 ml of precursor solution A under continuous magnetic stirring and dark conditions. After the addition is completed, the mixed solution is stirred at room temperature for 1 hour, and the precipitate After centrifugation, wash with deionized water and absolute ethanol several times, and dry in vacuum. ...

Embodiment 3

[0024] Take 25 mg of graphene oxide and dissolve it in 50 ml of deionized water, and obtain a graphene oxide dispersion with a concentration of 0.5 mg / ml after ultrasonic dispersion; weigh 0.7107 g of disodium hydrogen phosphate solid and dissolve it in deionized water, and after ultrasonic dispersion is uniform Obtain a disodium hydrogen phosphate solution with a concentration of 0.1 mol / L; weigh 2.548 g of silver nitrate solid and dissolve it in the above graphene oxide dispersion, wherein the concentration of silver nitrate is 0.3 mol / L, and obtain a precursor solution after magnetic stirring A. Slowly add 50 ml of the above-mentioned disodium hydrogen phosphate solution to 50 ml of precursor solution A under continuous magnetic stirring and dark conditions. After the addition, the mixed solution is stirred at room temperature for 2 hours, and the precipitate After centrifugation, wash with deionized water and absolute ethanol several times, and dry in vacuum; weigh 0.5 g of...

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Abstract

The invention discloses a preparation method of a silver phosphate / graphene nanocomposite. The method has the advantages that a light-assisted reducing process is adopted, the process is simple, and the cost is low, so that the method is suitable for large-scale production and industrial production. The prepared silver phosphate / graphene nanocomposite consists of silver phosphate nanoparticles and graphene nanosheets, wherein the graphene nanosheets cover the surfaces of the spherical silver phosphate nanoparticles with sizes of about 200nm, and the two are in close interface contact. The silver phosphate / graphene nanocomposite disclosed by the invention is a novel visible-light-driven photocatalyst which is more efficient and stable.

Description

technical field [0001] The invention relates to a preparation method of a silver phosphate / graphene nanocomposite material, belonging to the technical field of nanocomposite materials and photocatalysis. Background technique [0002] With the excessive exploitation of natural resources and the continuous deterioration of the natural environment, human society is facing increasingly serious problems such as energy shortage and environmental pollution. Due to the low energy consumption required, simple operation, non-toxic and harmless, and no secondary pollution, photocatalytic technology has broad application prospects in the development and utilization of solar energy and sewage treatment. Semiconductor nanomaterials have a photoelectric conversion effect and are the basic constituent materials of photocatalysts. However, most of the photocatalysts used in practice, such as titanium dioxide and zinc oxide, are wide bandgap semiconductors, and their light absorption waveleng...

Claims

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Application Information

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IPC IPC(8): B01J27/18
Inventor 崔灿王亚平梁大宇陆冰清杨亚娜应蓓丽
Owner ZHEJIANG SCI-TECH UNIV
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