Method for synthesizing porous oxide microspheres with vanillin alloy complex as precursor

A porous oxide and vanillin technology, applied in the field of photocatalysis, can solve the problems of large copper oxide particles, low energy density, limited copper oxide application, low specific surface area, etc., to achieve large specific surface area, improve photocatalytic performance, and porosity high rate effect

Active Publication Date: 2019-07-26
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The copper oxide particles synthesized by these methods are large, the specific surface area is low, and the energy density in supercapacitors is low, which limits the application of copper oxide in supercapacitors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A porous zinc oxide microsphere synthesized by using vanillin-zinc complex as a precursor, the specific preparation steps comprising:

[0056] 1) Weigh 0.595g (2mmol) Zn(NO 3 ) 2 ·6H 2 O was dissolved in 40ml of absolute ethanol solution under stirring condition, then added 0.405g (4mmol) triethylamine C 6 h 15 N, stir evenly to obtain solution Ⅰ;

[0057] 2) Dissolve 0.609g (4mmol) of vanillin in 80ml of absolute ethanol under stirring conditions, stir and mix evenly to obtain solution II;

[0058] 3) Mix the solution I obtained in step 1) and the solution II obtained in step 2) under stirring conditions, and stir evenly to obtain a reaction solution, then transfer it to a reaction kettle for 6 hours at 80°C, and then cool the reaction kettle naturally to At room temperature, the product was filtered and washed three times with absolute ethanol, and dried to obtain the vanillin-zinc complex MOF material;

[0059] 4) The vanillin-zinc complex MOF material was calc...

Embodiment 2

[0063] A porous zinc oxide microsphere synthesized by using vanillin-zinc complex as a precursor, the specific preparation steps comprising:

[0064] 1) Weigh 0.3267g (2mmol) of zinc chloride and dissolve it in 60ml of absolute ethanol solution with stirring, then add 0.219g (3mmol) of diethylamine C 4 h 11 N, stir evenly to obtain solution Ⅰ;

[0065] 2) Dissolve 0.609g (4mmol) of vanillin in 80ml of absolute ethanol under stirring conditions, stir and mix evenly to obtain solution II;

[0066] 3) Mix the solution I obtained in step 1) and the solution II obtained in step 2) under stirring conditions, and stir evenly to obtain a reaction solution, then transfer it to a reaction kettle for 10 hours at 130°C, and then cool the reaction kettle naturally to At room temperature, the product was filtered and washed three times with absolute ethanol, and dried to obtain the vanillin-zinc complex MOF material;

[0067] 4) The vanillin-zinc complex MOF material was calcined in a mu...

Embodiment 3

[0071] A porous zinc oxide microsphere synthesized by using vanillin-zinc complex as a precursor, the specific preparation steps comprising:

[0072] 1) Weigh 1.190Kg (4mol) Zn (NO 3 ) 2 ·6H 2 O is dissolved in 200L absolute ethanol solution under stirring condition, then adds 202g (2mol) triethylamine C 6 h 15 N, stir evenly to obtain solution Ⅰ;

[0073] 2) Dissolve 2436g (8mol) of vanillin in 200L of absolute ethanol under stirring conditions, stir and mix evenly to obtain solution II;

[0074] 3) Mix the solution I obtained in step 1) and the solution II obtained in step 2) under strong stirring, and stir evenly to obtain a reaction solution, then transfer it to the reaction kettle for 12 hours at 180°C, and then cool the reaction kettle naturally to At room temperature, the product was filtered and washed three times with absolute ethanol, and dried to obtain the vanillin-zinc complex MOF material;

[0075] 4) The vanillin-zinc complex MOF material was calcined in a...

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Abstract

The invention discloses a method for synthesizing porous oxide microspheres with a vanillin alloy complex as a precursor. The method includes the steps of firstly, synthesizing a vanillin alloy complex (Zn-MOF material or Cu-MOF material) by solvothermal reaction, and roasting the vanillin alloy complex which serves as the precursor in the presence of air so as to obtain a porous oxide (zinc oxideor copper oxide material). The obtained porous zinc oxide material, with the average particle diameter of 2-4 micrometers, has a hexagonal wurtzite structure, is high in specific surface area, and can effectively improve the defects that a traditional zinc oxide material is easy to agglomerate and is limited in photocatalytic performance due to insufficient exposed active sites and specific surface area. The obtained porous copper oxide microspheres with the average particle size of 1-5 micrometers are monoclinic, has a large specific surface area, and can effectively improve the defects thata traditional copper oxide material on a super capacitor is insufficient in specific surface area and low in energy density. The method is simple, low in cost and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a method for synthesizing zinc oxide microspheres with a porous structure by using a vanillin metal complex as a precursor. Background technique [0002] Photocatalytic technology is a green technology with important application prospects in the fields of energy and the environment. Under the irradiation of light, organic pollutants can be completely degraded into carbon dioxide and water. At the same time, the photocatalytic material itself has no loss and has an obvious spectral range. Wide, high activity, fast reaction rate, less secondary pollution, low operating cost and other advantages. Common photocatalysts are mostly metal oxides and sulfides, such as ZnO, TiO 2 , CdS, WO 3 Among them, zinc oxide has broad application prospects in the field of photocatalysis due to its high catalytic efficiency, low cost, and environmental friendliness. [0003] How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02H01G11/24H01G11/46
CPCC01G3/02H01G11/24H01G11/46C01P2006/16C01P2006/12C01P2004/61Y02E60/13
Inventor 林志东李婷付萍陈喆
Owner WUHAN INSTITUTE OF TECHNOLOGY
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