Preparation method of nuclear-shell double-layer zinc oxide/cobalt tetroxide nanometer material

A technology of cobalt tetroxide and nanomaterials, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as poor material degradation effect, achieve low synthesis temperature, Simple synthesis method and low cost effect

Inactive Publication Date: 2019-09-10
HARBIN INST OF TECH
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Problems solved by technology

[0003] The present invention is to solve the ZnO/Co prepared by existing methods 3 o 4 The problem of poor

Method used

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  • Preparation method of nuclear-shell double-layer zinc oxide/cobalt tetroxide nanometer material
  • Preparation method of nuclear-shell double-layer zinc oxide/cobalt tetroxide nanometer material
  • Preparation method of nuclear-shell double-layer zinc oxide/cobalt tetroxide nanometer material

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Example Embodiment

[0031] Specific embodiment 1: The preparation method of the core-shell double-layer zinc oxide / cobalt tetroxide nano material of this embodiment includes the following steps:

[0032] 1. Synthesis of ZIF8 material:

[0033] The zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O) Dissolve in methanol to form solution A, dissolve 2-methylimidazole in methanol to form solution B. While stirring solution A with a magnetic stirrer, slowly add solution B and continue stirring for 5-10 minutes, and the resulting mixed solution is transferred to Place the reaction kettle in an oven and age at 100-120℃ for 12-14h to obtain a solid-liquid mixture. Wash the solid precipitate with methanol centrifugation for three times. Dry for 8-12h at 70-80℃ to obtain a rhombus ten Dihedral ZIF8 nano material;

[0034] 2. Synthesis of ZIF8@ZIF67 materials:

[0035] Disperse the ZIF8 nanomaterial in methanol ultrasonically for 30-60min to form solution C (it is a more uniformly dispersed suspension, the ZIF8 nanoma...

Example Embodiment

[0040] Specific embodiment two: this embodiment is different from specific embodiment one in that in step one, the mass concentration of zinc nitrate hexahydrate in solution A is 29-30 g / L. Others are the same as the first embodiment.

Example Embodiment

[0041] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the mass concentration of 2-methylimidazole in solution B in step one is 49-50 g / L. Others are the same as the first or second embodiment.

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Abstract

The invention relates to a preparation method of a nuclear-shell double-layer zinc oxide/cobalt tetroxide nanometer material and relates to a preparation method of the nanometer material and solves the problem of poor degradation of ZnO/Co3O4 prepared by the existing methods. The preparation method comprises the following steps: 1, dissolving zinc nitrate hexahydrate in methanol to form solution A, dissolving 2-methylimidazole in methanol to form solution B, mixing solution A and solution B, aging in an oven, washing and precipitating, and drying to obtain ZIF8 nanometer material; 2, dispersing that ZIF8 nanometer material in methanol to form solution C, dissolving cobalt chloride in methanol to form solution D, dissolving 2-methylimidazole in methanol to form solution E, and mixing the solutions C, D and E, aging in an oven to obtain a solid-liquid mixture, washing and precipitating and drying to obtain ZIF8@67 nanomaterial; 3, calcining ZIF8@67 nanometer material to obtain ZnO/Co3O4nanometer material. The invention is used in the field of nanometer materials.

Description

technical field [0001] The invention relates to a preparation method of nanometer material. Background technique [0002] In the field of environmental chemistry, photocatalytic degradation of pollutants has always been a hot spot of concern, and the catalysts generally recognized and studied mainly include ZnO, TiO 2 , CdS, ZnS, MoS 2 Wait. The preparation method mainly includes sol-gel method, ion exchange method, microwave-assisted precipitation method, electrochemical deposition method, hydrothermal method, solvothermal method and heat treatment method. There are common defects in the structure of materials currently used for pollutant degradation, such as the ZnO / Co with inhomogeneous morphology that has been reported. 3 o 4 The specific surface area of ​​the material is too small, and the electron-hole recombination is too fast. On the other hand, there is no uniform and regular channel for the electron-hole directional migration, which greatly reduces the photocat...

Claims

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Application Information

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IPC IPC(8): B01J23/80B01J35/10C02F1/30C02F101/38
CPCB01J23/002B01J23/80B01J35/004B01J35/0073B01J35/1004C02F1/30C02F2101/40C02F2305/10
Inventor 杨敏张春艳
Owner HARBIN INST OF TECH
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