Preparation method of porous conical ZnO nano-powder

A nano-powder and conical-shaped technology, which is applied in the field of nano-material preparation, can solve the problems that the product does not have porous structure characteristics, the conical nano-ZnO synthesis process is complicated, and the cost is high, so as to achieve good photocatalytic performance and good monodispersity , low cost effect

Inactive Publication Date: 2018-06-01
XIAN UNIV OF TECH +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention intends to solve the problems that the existing conical nano-ZnO synthesis process is

Method used

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  • Preparation method of porous conical ZnO nano-powder
  • Preparation method of porous conical ZnO nano-powder
  • Preparation method of porous conical ZnO nano-powder

Examples

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Example Embodiment

[0025] Example 1

[0026] A preparation method of porous conical ZnO nano powder includes the following steps:

[0027] (1) Dissolve 0.02634 g of anhydrous zinc acetate in a mixed solvent consisting of 30 mL of absolute ethanol and 0.5 mL of deionized water to obtain a zinc acetate solution;

[0028] (2) The zinc acetate solution obtained in step (1) is heated to 70° C. under magnetic stirring and kept for 15 minutes to obtain a solid-liquid mixture containing ZnO precipitation;

[0029] (3) The solid-liquid mixture containing ZnO precipitate obtained in step (2) is centrifuged and washed with absolute ethanol for 5 times, and then the centrifuged-washed product is dried at 50° C. for 12 hours to obtain porous conical ZnO nanopowder.

[0030] The TEM image of the ZnO nano powder obtained in this example is shown in Fig. 1(a), and the SEM image is shown in Fig. 1(b). It can be seen from Figure 1(a) and (b) that the ZnO nanopowder obtained by the preparation method of this application ha...

Example Embodiment

[0031] Example 2

[0032] A preparation method of porous conical ZnO nano powder includes the following steps:

[0033] (1) Dissolve 0.77062 g of anhydrous zinc acetate in 100 mL of mixed solvent to obtain a zinc acetate solution;

[0034] Among them, the mixed solvent is composed of absolute ethanol, ethylene glycol and deionized water in a volume ratio of 50:50:1;

[0035] (2) The zinc acetate solution obtained in step (1) is heated to 50° C. under magnetic stirring and kept for 40 minutes to obtain a solid-liquid mixture containing ZnO precipitation;

[0036] (3) The solid-liquid mixture containing the ZnO precipitate obtained in step (2) is centrifuged and washed 5 times with absolute ethanol, and then the centrifuged-washed product is dried at 80° C. for 10 hours to obtain porous conical ZnO nanopowder.

Example Embodiment

[0037] Example 3

[0038] A preparation method of porous conical ZnO nano powder includes the following steps:

[0039] (1) Dissolve 0.5798 g of anhydrous zinc acetate in a mixed solvent consisting of 40 mL of methanol and 0.5 mL of deionized water to obtain a zinc acetate solution;

[0040] (2) The zinc acetate solution obtained in step (1) is heated to 75° C. under magnetic stirring and kept for 30 minutes to obtain a solid-liquid mixture containing ZnO precipitation;

[0041] (3) The solid-liquid mixture containing ZnO precipitate obtained in step (2) is centrifuged and washed 4 times with absolute ethanol, and then the centrifuged-washed product is dried at 60° C. for 6 hours to obtain porous conical ZnO nano powder.

[0042] The SEM picture of the ZnO nano powder obtained in this example is shown in figure 2 . From figure 2 It can be seen that the ZnO nano powder obtained by the preparation method of the present application has a conical shape and a good porous structure.

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Abstract

The invention provides a preparation method of porous conical ZnO nano-powder and belongs to the technical field of preparation of nano-materials. The preparation method is a one-step liquid phase decomposition method. The method comprises zinc acetate solution preparation, heating and thermal insulation for zinc acetate decomposition, and post-treatment. The preparation method of the porous conical ZnO nano-powder is a liquid phase decomposition method and has the advantages of low cost, strong controllability, simple and quick processes and good operability. Through adjustment and control ofa solvent volume ratio, a reactant concentration, a reaction temperature and reaction time, the ZnO nano-powder with porous conical morphology, good monodispersity, uniform sizes and regular shapes is prepared. The nano-ZnO has a porous structure formed by stacking many zero-dimensional nano-particle structural units and the exposed crystal planes are highly chemically active high-index crystal planes and polar crystal planes and have excellent photocatalytic performances.

Description

technical field [0001] The invention relates to the technical field of preparation of nanometer materials, in particular to a method for preparing porous conical ZnO nanopowder. Background technique [0002] Zinc oxide (ZnO) is a typical wide bandgap n-type semiconductor material, and its bandgap width is about 3.2eV. Due to its unique physical and chemical properties, ZnO has been widely used in the fields of catalysts, secondary batteries, biosensors, antibacterial and antivirus and gas sensors. [0003] It is well known that the performance of materials is closely related to their microscopic morphology, and excellent performance cannot be separated from special morphology. The morphology of nano-ZnO prepared so far mainly includes: quantum dots, nanowires, nanorods, nanobelts, three-dimensional hierarchical structures (such as sea urchins, hollow spheres, worms and dandelions) and porous structures. In particular, nano-ZnO with a porous structure exhibits high chemical...

Claims

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Application Information

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IPC IPC(8): C01G9/02B82Y40/00
CPCC01G9/02B82Y40/00C01P2004/03C01P2004/04C01P2004/30C01P2004/50C01P2004/62
Inventor 孙少东梁淑华苟旭丰崔杰杨卿罗永光曲洪涛邹坤呈张特保佳懿
Owner XIAN UNIV OF TECH
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