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Preparation method of hexahedron ZnCo2O4 composite material

A composite material and hexahedral technology, which is applied in the field of preparation of hexahedral ZnCo2O4 composite materials, can solve the problems of many bimetallic oxide impurities, limited development and high process energy consumption, and achieves the effects of simple preparation steps, low density and large specific surface area.

Pending Publication Date: 2019-06-28
XUYI XINYUAN OPTICAL SCI TECH CO LTD
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Problems solved by technology

[0005] At present, the preparation of bimetallic oxides with three-dimensional structure (hollow structure) is based on MOFs as a template to obtain polyhedral double metal oxides at an appropriate oxidation temperature, although the oxidation conditions of MOFs as a template in air can be optimized to obtain different shapes. It has the advantages of large specific surface area and adjustable pore size, but the high energy consumption of the process and many impurities in the synthesized double metal oxide limit its industrial development.

Method used

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  • Preparation method of hexahedron ZnCo2O4 composite material
  • Preparation method of hexahedron ZnCo2O4 composite material
  • Preparation method of hexahedron ZnCo2O4 composite material

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preparation example Construction

[0026] The invention discloses a hexahedral ZnCo 2 O 4 A preparation method of a composite material, the method specifically comprises the following steps:

[0027] (1) Synthesis of ZnCo-ZIF composites

[0028] Weigh Zn(NO 3 ) 2 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 O and CTAB (hexadecyltrimethylammonium bromide) were dissolved to form A solution, 2-methylimidazole was weighed and dissolved to form B solution, A solution and B solution were sonicated and mixed to obtain a solid-liquid mixture, and then the solid-liquid mixture was obtained. The liquid mixture is subjected to solid-liquid separation treatment, and the solid obtained from the separation is collected and dried to obtain a solid powder;

[0029] (2) The solid powder obtained in step (1) is placed in an air atmosphere for high temperature calcination, and the hexahedral ZnCo disclosed in the present invention can be obtained 2 O 4 composite material.

[0030] In order to further realize the technical effect of the ...

Embodiment 1

[0037] A kind of hexahedral ZnCo 2 O 4 Preparation of composite materials

[0038] method, the method specifically comprises the following steps:

[0039] (1) Preparation of ZnCo-ZIF composites

[0040] Weigh 0.3g Zn(NO 3 ) 2 ·6H 2 O, 0.6g Co(NO 3 ) 2 ·6H 2 O and 15mg CTAB (hexadecyltrimethylammonium bromide) were dissolved in 50mL of deionized water to form A solution, which was stirred for 30min by ultrasonic; 2-methylimidazole was weighed and dissolved in 100mL of deionized water to form B solution, and ultrasonically stirred for 30min ; Then the A and B solutions were mixed, wherein Zn(NO 3 ) 2 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 The molar ratio of O and 2-methylimidazole was 1:2:100; the mixed solution was ultrasonically stirred for 10 min at room temperature, washed with deionized water for 3 times, and dried in an oven at 70 °C for 20 h to obtain bimetallic ZnCo-ZIF powder;

[0041] (2) Hexahedral ZnCo 2 O 4 Preparation of composite materials

[0042] The bime...

Embodiment 2

[0044] The difference between this example and Example 1 is that: the bimetallic ZnCo-ZIF powder obtained in step (1) is placed in a tube furnace at 375 ° C for oxidative calcination for 4 hours, and other parameters remain unchanged, according to Example 1 The disclosed preparation method prepares a ZnCo-ZIF composite material.

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Abstract

The invention discloses a preparation method of a hexahedron ZnCo2O4 composite material. The hexahedron ZnCo2O4 composite material is prepared through oxidizing calcining in a tubular furnace by taking ZnCo-ZIF as a template. The preparation method has the advantages that the preparation steps are simple, the preparation condition is mild and easy to control, the shape of the ZnCo-ZIF template ismaintained, a hexahedron hollow structure with a relatively large specific surface area and an adjustable aperture is generated, and the generated hexahedron ZnCo2O4 composite material has excellent application prospects in the fields of energy storage, catalysis and the like.

Description

technical field [0001] The invention relates to the field of chemical material preparation, in particular to a hexahedral ZnCo 2 O 4 Method for preparing composite materials. Background technique [0002] Single transition metal oxides have higher theoretical capacity, a large number of redox active sites, abundant energy storage, low cost, and have the advantages of photosensitivity, heat sensitivity, impurity sensitivity, etc., and are widely used in energy storage, electrocatalysis and sensors. and other fields. Although there are many commonalities, each single transition metal oxide has certain differences in crystal structure and redox behavior, the valence states available for reaction are limited, and the electrochemical utilization rate is low and the rate performance is relatively low under high current. poor, which greatly limits its application. The double transition metal oxides include at least one transition metal ion and one or more electrochemically acti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00
Inventor 陈道理张旭明委福祥
Owner XUYI XINYUAN OPTICAL SCI TECH CO LTD
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