Zinc oxide and gold nanoparticle composite material and preparation method thereof

A gold nanoparticle and composite material technology, applied in the field of functional material preparation, can solve problems such as high exciton binding energy, limited photocatalytic degradation of organic matter, large band gap, etc., achieve good application prospects, increase photoresponse range, and cost low effect

Inactive Publication Date: 2016-01-06
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ZnO has a large band gap and high exciton binding energy, which limits its ability to photocatalytically degrade organic matter.

Method used

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  • Zinc oxide and gold nanoparticle composite material and preparation method thereof
  • Zinc oxide and gold nanoparticle composite material and preparation method thereof
  • Zinc oxide and gold nanoparticle composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1.1 Add 2.5mmol zinc nitrate, 3.75mmol tartaric acid and 2.5mmol potassium hydroxide to 50mL deionized water, stir well at room temperature to obtain a uniform milky white emulsion;

[0029] 1.2 Transfer the emulsion described in step 1.1 to the reactor, and hydrothermally heat it at 100°C for 6 hours. After the reaction, the precursor of zinc oxide is obtained by centrifugal washing and drying, and then the precursor is exposed to 300°C in an air atmosphere Calcined for 2h to obtain zinc oxide;

[0030] 1.3 Add the 0.2mmol zinc oxide prepared in step 1.2 to 20mL of deionized water, and after 6 hours of magnetic stirring, a uniform zinc oxide aqueous solution is obtained; then 50μL of concentration is 50mmolL -1 The gold chloroauric acid is added dropwise to the obtained zinc oxide solution, the solution of purple zinc oxide and gold nanoparticle composite material is obtained by stirring, and finally the zinc oxide and gold nanoparticle composite material is obtained by cent...

Embodiment 2

[0033] 2.1 Add 2.5mmol of zinc nitrate, 3.75mmol of tartaric acid and 2.5mmol of potassium hydroxide to 50mL of deionized water, fully stir at room temperature to obtain a uniform milky white emulsion;

[0034] 2.2 Transfer the emulsion described in step 2.1 to the reactor, and hydrothermally heat it at 150°C for 6 hours. After the reaction, the precursor of zinc oxide is obtained by centrifugal washing and drying, and then the precursor is exposed to 300°C in an air atmosphere Calcined for 2h to obtain zinc oxide;

[0035] 2.3 Add the 0.2mmol zinc oxide prepared in step 2.2 to 20mL of deionized water, and after 6 hours of magnetic stirring, a uniform zinc oxide aqueous solution is obtained; then the concentration of 50μL is 50mmolL -1 The gold chloroauric acid is added dropwise to the obtained zinc oxide solution, the solution of purple zinc oxide and gold nanoparticle composite material is obtained by stirring, and finally the zinc oxide and gold nanoparticle composite material is...

Embodiment 3

[0038] 3.1 Add 2.5mmol of zinc nitrate, 3.75mmol of tartaric acid and 2.5mmol of potassium hydroxide to 50mL of deionized water, fully stir at room temperature to obtain a uniform milky white emulsion;

[0039] 3.2 Transfer the emulsion described in step 3.1 to the reactor, and hydrothermally heat it at 200°C for 3 hours. After the reaction, the precursor of zinc oxide is obtained by centrifugal washing and drying, and then the precursor is exposed to 300°C in an air atmosphere Calcined for 2h to obtain zinc oxide;

[0040] 3.3 Add the 0.2mmol zinc oxide prepared in step 3.2 to 20mL of deionized water, and after 6 hours of magnetic stirring, a uniform zinc oxide aqueous solution is obtained; then 50μL of concentration is 50mmolL -1 The gold chloroauric acid is added dropwise to the obtained zinc oxide solution, the solution of purple zinc oxide and gold nanoparticle composite material is obtained by stirring, and finally the zinc oxide and gold nanoparticle composite material is obt...

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Abstract

The invention discloses a zinc oxide and gold nanoparticle composite material and a preparation method thereof. The preparation method includes the steps that firstly, a zinc source, alkali and a surface active agent are uniformly mixed with deionized water to obtain a mixture; then the mixture is put in a reacting kettle for thermal treatment and then subjected to processes such as centrifugal washing, drying and calcination to obtain zinc oxide; the obtained zinc oxide is uniformly dispersed in the deionized water through magnetic stirring, and then chloroauric acid is added into the system and stirred to obtain the zinc oxide and gold nanoparticle composite material. The zinc oxide and gold nanoparticle composite material with different appearances and gold contents can be obtained through adjustment of reaction temperature, raw material categories and concentrations in the preparation process. The preparation method is simple, low in cost and capable of saving energy; additional reductive agents and additional light sources are not needed during forming of the composite material, and the application prospects are wide in the fields such as mass production of zinc oxide and gold nanoparticle composite materials and photocatalytic degradation organic matters.

Description

technical field [0001] The invention relates to a composite material, in particular to a zinc oxide and gold nanoparticle composite material and a preparation method thereof, belonging to the technical field of functional material preparation. Background technique [0002] In order to effectively degrade organic pollutants, a large number of semiconductor photocatalytic materials have been prepared. Among these photocatalytic materials, ZnO has attracted the attention of researchers due to its large surface area and high photosensitivity. However, ZnO has the characteristics of large band gap and high exciton binding energy, which limit its ability to photocatalytically degrade organic compounds. Depositing noble metals (Au, Ag, etc.) on the surface of ZnO can effectively enhance the photocatalytic ability of ZnO. So far, composites of noble metals deposited on ZnO surfaces with various morphologies have been prepared, such as ZnO nanoparticles-gold, ZnO nanorods-gold, flo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/24B82Y30/00B82Y40/00
Inventor 杨萍宋雪玲
Owner UNIV OF JINAN
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