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Preparation method for ZnO two-dimensional porous material

A technology of porous materials and porous powders, which is applied in the field of preparation of ZnO two-dimensional porous materials, can solve problems such as tedious methods, unsuitable for large-scale industrial production, harsh conditions, etc., and achieve the effect of simple preparation process

Inactive Publication Date: 2012-07-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, most of the methods for preparing ZnO porous materials are cumbersome and harsh, and are not suitable for large-scale industrial production.
In addition, ZnO two-dimensional porous materials with a particle size of tens of microns are rarely reported.

Method used

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  • Preparation method for ZnO two-dimensional porous material
  • Preparation method for ZnO two-dimensional porous material
  • Preparation method for ZnO two-dimensional porous material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1.250 g of zinc nitrate Zn(NO 3 ) 2 ?6H 2 O and 1.750 g of glycine C 2 h 5 NO 2 Completely dissolved in 15 mL of distilled water to obtain a mixed solution, and then the crucible containing the above solution was placed in a muffle furnace and heated at 400 °C. The solution undergoes boiling, foaming, drying, and self-propagating combustion to obtain a fluffy foam-like substance, which can be further heat-treated at 500 °C for 5 hours to obtain a ZnO two-dimensional porous material.

[0019] figure 1 and figure 2 They are field emission scanning electron micrographs and transmission electron micrographs of the obtained product, respectively. It can be seen that the product has a porous micron-scale two-dimensional structure, and the pore size is relatively uniform. image 3 It is the X-ray diffraction pattern of the product, and it can be seen that the phase of the obtained product is ZnO through comparison with the standard card.

Embodiment 2

[0021] 0.500 g of Zn(NO 3 ) 2 ?6H 2 O and 1.750 g of C 2 h 5 NO 2 Completely dissolved in 15 mL of distilled water to obtain a mixed solution, and then the crucible containing the above solution was placed in a muffle furnace and heated at 400 °C. The solution undergoes boiling, foaming, drying, and self-propagating combustion to obtain a fluffy foam-like substance, which can be further heat-treated at 500 °C for 5 hours to obtain a ZnO two-dimensional porous material.

[0022] Figure 4 It is a field emission scanning electron micrograph of the product, and it can be seen that the product is a porous two-dimensional structure with high porosity.

Embodiment 3

[0024] 0.875 g of Zn(NO 3 ) 2 ?6H 2 O and 1.750 g of C 2 h 5 NO 2 Completely dissolved in 15 mL of distilled water to obtain a mixed solution, and then the crucible containing the above solution was placed in a muffle furnace and heated at 500 °C. The solution undergoes boiling, foaming, drying, and self-propagating combustion to obtain a fluffy foam-like substance, which can be further heat-treated at 500 °C for 5 hours to obtain a ZnO two-dimensional porous material.

[0025] Figure 5 and Figure 6 The low-magnification and high-magnification field emission scanning electron micrographs of the product are respectively, and it can be seen that the product has a porous two-dimensional structure.

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Abstract

The invention discloses a preparation method for a ZnO two-dimensional porous material. According to the invention, zinc nitrate is used as an oxidizing agent and a zinc source, glycine is used as a fuel, an organic / inorganic mixture is obtained through solution combustion, then organic matters are removed through heat treatment, inorganic matters are crystallized, and the ZnO two-dimensional porous material with good crystallization is obtained. Compared to conventional technologies for preparing ZnO porous powder, the method provided in the invention has the advantages of a simple process, no need for any template or surfactant and good suitability for large scale production.

Description

Technical field [0001] The present invention involves a preparation method of a two -dimensional porous material of ZNO. Background technique [0002] ZNO is a widely used wide -ranging semiconductor material. It has very important applications in the fields of glowing, solar cells, field launch, photoelectric and poppies.Due to the characteristics of large ratio surface area and high pore rate, multi -pores are used in the fields of adsorption, catalytic, separation, sound insulation, and gas sensitivity.China's patent CN1778763 disclosed the addition of ZNO powder and methane in a high -pressure kettle and then put it in a high -temperature furnace to be heated to more than 200 ° C. The pressure is more than 2.5MPa for 3 hours.powder.The Chinese patent CN101786651A refined the reaction between zinc nitrate and ammonia water, obtained a chip -shaped alkaline zinc front drive, and then roasted to obtain a porous ZNO nanoscopic tablets.So far, most of the methods of preparing ZNO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02
Inventor 文伟吴进明
Owner ZHEJIANG UNIV
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