Preparation method of ZnO nano porous sheet cluster

A nanoporous and cluster technology, applied in the field of nanomaterials, can solve the problems of low concentration and reduce the production efficiency of ZnO, and achieve the effect of improving production efficiency

Active Publication Date: 2014-12-24
嘉善县国创新能源研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Due to the Zn in the starting solution 2+ The concentration is low, which obviously reduces the production efficiency of ZnO, and it is necessary to find a way to use high concentration Zn 2+ Method for preparing ZnO nanosheet clusters by reacting zinc nitrate solution and urea

Method used

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  • Preparation method of ZnO nano porous sheet cluster
  • Preparation method of ZnO nano porous sheet cluster
  • Preparation method of ZnO nano porous sheet cluster

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Weigh zinc nitrate and urea respectively according to the molar ratio of zinc nitrate and urea being 1:3, add deionized water to prepare Zn 2+ 50mL of mixed solution with a concentration of 0.3M; pour the mixed solution into a polytetrafluoroethylene cylindrical bottomed container with an inner diameter of 20mm and a wall thickness of 0.8mm; seal the open end with a plastic film, and heat in a water bath at 85°C for 12h; The resulting white solid was collected by filtration and dried in an oven at 120 °C for 24 h; part of the white solid was roasted at 250 °C and 500 °C for 6 h, respectively. figure 1 It is the scanning electron microscope observation results of the white solid after drying and the ZnO nanoporous sheet clusters calcined at 250°C and 500°C. The calcining treatment did not destroy the shape and size of the ZnO clusters, but it was a smooth sheet before calcining. Afterwards, it turns into a sheet with more transparent holes, and its thickness is about 50n...

Embodiment 2

[0032] Weigh zinc nitrate and urea respectively according to the molar ratio of zinc nitrate and urea being 1:4, add deionized water to prepare Zn 2+ 1800mL of solution with a concentration of 0.3M; pour these solutions into 12 glass cylindrical bottomed containers with an inner diameter of 40mm and a wall thickness of 2.0mm; seal the open end with a plastic film, and heat it in an oil bath at 95°C. Take out a container every hour; collect the white solid formed by filtration, dry it in an oven at 120°C for 24h, and then bake it at 500°C for 6h. figure 2 It is the crystal form analysis result of the samples after roasting with different synthesis times. They are all ZnO with high crystallinity, and the length of synthesis time does not affect the ZnO crystal form. image 3 It is the scanning electron microscope observation result of the ZnO nanoporous sheet cluster obtained by roasting the white solid formed after 12 hours of reaction at 500°C. The thickness of the sheet is a...

Embodiment 3

[0034] Weigh zinc nitrate and urea respectively according to the molar ratio of zinc nitrate and urea being 1:3, add deionized water to prepare Zn 2+ 90 mL of a solution with a concentration of 0.5 M; pour these solutions into a glass cylindrical bottomed container with an inner diameter of 30 mm and a wall thickness of 1.5 mm; after sealing the open end with a plastic film, put it in a 90°C water bath and heat for 12 hours; collect by filtration The resulting white solid was dried in an oven at 120°C for 24 hours, and then calcined at 500°C for 6 hours. Figure 4 It is the scanning electron microscope observation result of the ZnO nanoporous sheet cluster obtained by roasting, the thickness of the sheet is about 50nm, and there are many through holes in it.

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Abstract

The invention discloses a preparation method of a ZnO nano porous sheet cluster. The reparation method comprises the steps of mixing raw materials, namely zinc nitrate and urea, with water, adding the mixture to a cylindrical container having the inner diameter of 10-50mm, sealing, heating to the range of 80-100 DEG C for reacting under normal pressure for 1-15h, and finally, performing filtering, drying and roasting treatment to obtain the ZnO nano porous sheet cluster. The cylindrical reactor with the special inner diameter is adopted for the preparation method of the ZnO nano porous sheet cluster so that the ZnO nano porous sheet cluster can be prepared by reacting the zinc nitrate with the urea under the condition of a high Zn<2+> concentration, and therefore, the production efficiency of ZnO can be improved.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a method for preparing clusters assembled from ZnO porous sheets with nanoscale thickness. Background technique [0002] The performance of a material is transmitted through its surface. Since the surface properties and surface area are determined by the shape and size of the material, the shape and size of the material have a decisive impact on the performance of the material. [0003] ZnO is a functional material widely used in the fields of coatings, cosmetics, catalysts, luminescent materials and solar cells. In the application research of ZnO, it is found that the shape and size of ZnO obviously affect its performance. For example, Chinese patent CN103901075A discloses a gas sensor constructed of three-dimensional porous ZnO nanospheres, which has a sensitivity of 145.9 to 100ppm acetone; however, the sensitivity of the gas sensor constructed of dumbbell-shaped ZnO is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02
Inventor 宁文生邸琬茗
Owner 嘉善县国创新能源研究院
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