Preparation method of Cu3V2O8 nano bead string rich in oxygen vacancy defects

A technology of oxygen vacancies and defects, which is applied in the field of nanomaterials and electrochemistry, can solve the problems of copper vanadate introducing oxygen vacancies, etc., and achieve the effect of easy industrial mass production, simple equipment and instruments, and industrial mass production

Active Publication Date: 2021-10-01
SHAANXI SCI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

More importantly, none of the above reported methods can introduce oxygen vacancy defects into the obtained copper vanadate

Method used

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  • Preparation method of Cu3V2O8 nano bead string rich in oxygen vacancy defects
  • Preparation method of Cu3V2O8 nano bead string rich in oxygen vacancy defects

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Disperse the polypyrrole-coated cuprous oxide nanowires in deionized water, and magnetically stir to form a suspension A with a concentration of 0.00125 g / mL;

[0023] 2) adding polypyrrole-coated cuprous oxide nanowire mass 0.5 times the analytically pure ammonium metavanadate powder to the suspension A to obtain a mixed suspension B;

[0024] 3) Mix the β-cyclodextrin solution with a concentration of 0.05g / mL and the suspension B at a volume ratio of 2:10 evenly, seal the seal with a plastic wrap, and continuously stir and react at room temperature for 12 hours. The product was separated by filtration, washed with deionized water and dried at 60°C;

[0025] 4) Spread the product of step 3) on a porcelain boat, heat it from room temperature to 350°C at a heating rate of 2°C / min and keep it for 3 hours. After the reaction is completed, it is cooled with the furnace to obtain oxygen-rich defect Cu 3 V 2 o 8 Nano beads.

Embodiment 2

[0027] 1) Disperse the polypyrrole-coated cuprous oxide nanowires in deionized water, and magnetically stir to form a suspension A with a concentration of 0.00125 g / mL;

[0028] 2) adding polypyrrole-coated cuprous oxide nanowire mass 0.5 times the analytically pure ammonium metavanadate powder to the suspension A to obtain a mixed suspension B;

[0029] 3) Mix the β-cyclodextrin solution with a concentration of 0.05g / mL and the suspension B at a volume ratio of 1.8:10, seal the seal with plastic wrap, and react with continuous stirring at room temperature for 24 hours. The product was separated by filtration, washed with deionized water and dried at 60°C;

[0030] 4) Spread the product of step 3) on a porcelain boat, heat it from room temperature to 425°C at a heating rate of 2°C / min and keep it for 2 hours. After the reaction is completed, it is cooled in the furnace to obtain oxygen-rich defect Cu 3 V 2 o 8 Nano beads.

Embodiment 3

[0032] 1) Disperse the polypyrrole-coated cuprous oxide nanowires in deionized water, and magnetically stir to form a suspension A with a concentration of 0.00125 g / mL;

[0033] 2) Adding polypyrrole-coated cuprous oxide nanowires with 0.8 times the analytically pure ammonium metavanadate powder to the suspension A to obtain a mixed suspension B;

[0034]3) Mix the β-cyclodextrin solution with a concentration of 0.05g / mL and the suspension B at a volume ratio of 1.2:10, seal the seal with a plastic wrap, and react with continuous stirring at room temperature for 24 hours. The product was separated by filtration, washed with deionized water and dried at 60°C;

[0035] 4) Spread the product of step 3) on a porcelain boat, heat it from room temperature to 425°C at a heating rate of 5°C / min and keep it for 2 hours. After the reaction is completed, it is cooled in the furnace to obtain oxygen-rich defect Cu 3 V 2 o 8 Nano beads.

[0036] From figure 1 It can be seen that the d...

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Abstract

The invention relates to a preparation method of a Cu3V2O8 nano bead string rich in oxygen vacancy defects. The preparation method comprises the steps: dispersing cuprous oxide nanowires coated with polypyrrole in deionized water to obtain a suspension A; adding analytically pure ammonium metavanadate powder into the suspension A to obtain a mixed suspension B; uniformly mixing a beta-cyclodextrin solution with the suspension B, sealing with a preservative film, continuously stirring at room temperature for reaction, separating a product after the reaction is finished, washing the product with deionized water cleanly, and drying; and flatly laying a product in a porcelain boat, carrying out heating and heat preservation reaction, carrying out furnace cooling after the reaction is completed, and thus obtaining the Cu3V2O8 nanometer bead string rich in the oxygen vacancy defects. In the synthesis process, the chemical reaction is carried out in the range of the polypyrrole coated nanowire, and due to the confinement effect of a polypyrrole coating layer, the obtained product is the nano bead string formed by connecting nano particles end to end. Beta-cyclodextrin is used as a defect inducer and is adsorbed on the surface of polypyrrole through coordination to form an inclusion layer.

Description

technical field [0001] The invention relates to the field of nanomaterials and electrochemistry, in particular to a method for preparing Cu rich in oxygen vacancy defects 3 V 2 o 8 A method for nanobeaded materials. Background technique [0002] Cu 3 V 2 o 8 It belongs to a kind of binary copper-based oxide semiconductor material, whose crystal is composed of CuO 6 Octahedron and VO 4 It is constructed of hexahedron and has a typical layered structure. And its interplanar spacing is relatively large, which is suitable for the intercalation and extraction of lithium ions. In addition, Cu 3 V 2 o 8 Copper and vanadium ions in the middle multivalent state can be reduced in multiple steps during the charge and discharge process, and can provide higher energy density than monovalent state materials. It is a potential high-performance lithium-ion battery anode material. In addition, a large number of studies have shown that introducing oxygen vacancies into the materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00B82Y40/00
CPCC01G31/00B82Y40/00C01P2004/32C01P2002/72C01P2004/04Y02E60/10
Inventor 王勇寇领江艾桃桃宋佳佳邓志峰
Owner SHAANXI SCI TECH UNIV
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