VOOH/VS4 micrometer composite powder as well as preparation method and application of VOOH/VS4 micrometer composite powder

A composite powder and reaction technology, which is applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of no composite material preparation technology, and achieve excellent catalytic performance, low temperature, and chemical composition. uniform effect

Active Publication Date: 2018-06-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently there is no VOOH / VS 4 Related reports on composite material preparation technology

Method used

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  • VOOH/VS4 micrometer composite powder as well as preparation method and application of VOOH/VS4 micrometer composite powder
  • VOOH/VS4 micrometer composite powder as well as preparation method and application of VOOH/VS4 micrometer composite powder
  • VOOH/VS4 micrometer composite powder as well as preparation method and application of VOOH/VS4 micrometer composite powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Step 1: Add 2.4g of sodium metavanadate and 3.6g of thioacetamide into 60ml of deionized water at the same time, and magnetically stir for 60min at a speed of 600r / min to obtain a semi-clear solution A;

[0045] Step 2: Then add 0.7mol / L ammonia solution dropwise to solution A, control the drip rate of ammonia solution to 0.15ml / min, after adding one drop of ammonia solution, stir until the pH value of the solution is stable, then drop in Add a drop of ammonia solution until the pH value of the solution reaches 10.6 to obtain solution B;

[0046] Step 3: Pour solution B into the reaction liner according to the filling ratio of 60% and seal it, install the liner in the outer kettle and fix it, place it in a homogeneous reactor, and heat it from room temperature to 180℃ hydrothermal reaction for 24h;

[0047] Step 4: After the hydrothermal reaction is completed, the reaction kettle is naturally cooled to room temperature, and then the product cooled after the reaction is...

Embodiment 2

[0061] Step 1: Take 2.0g of sodium metavanadate and 3.5g of thioacetamide and add them to 55ml of deionized water at the same time, and magnetically stir for 65min at a speed of 500r / min to obtain a semi-clear solution A;

[0062] Step 2: Then add 0.9mol / L ammonia solution dropwise to solution A, control the drip rate of ammonia solution to 0.13ml / min, after adding one drop of ammonia solution, stir until the pH value of the solution is stable, then add Add a drop of ammonia solution until the pH value of the solution reaches 10.7 to obtain solution B;

[0063] Step 3: Pour solution B into the reaction liner at a filling ratio of 55% and seal it, place the liner in an outer kettle and fix it in a homogeneous reactor, and heat it from room temperature to 175℃ hydrothermal reaction for 25h;

[0064] Step 4: After the hydrothermal reaction is over, cool the reaction vessel to room temperature naturally, then take out the cooled product after the reaction, and collect it by centr...

Embodiment 3

[0067] Step 1: Add 2.2g of sodium metavanadate and 3.8g of thioacetamide into 65ml of deionized water at the same time, and stir magnetically for 55min at a speed of 800r / min to obtain a semi-clear solution A;

[0068] Step 2: Then add 0.8mol / L ammonia solution dropwise to solution A, control the rate of addition of ammonia solution to 0.16ml / min, after adding one drop of ammonia solution, stir until the pH value of the solution is stable, then add Add a drop of ammonia solution until the pH value of the solution reaches 10.7 to obtain solution B;

[0069] Step 3: Pour solution B into the reaction liner at a filling ratio of 65% and seal it, place the liner in an outer kettle and fix it in a homogeneous reactor, and heat it from room temperature to 185℃ hydrothermal reaction for 23h;

[0070] Step 4: After the hydrothermal reaction is over, cool the reaction vessel to room temperature naturally, then take out the cooled product after the reaction, alternately suction filter 4...

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Abstract

The invention discloses a VOOH/VS4 micrometer composite powder as well as a preparation method and application of the VOOH/VS4 micrometer composite powder. The preparation method comprises the steps:simultaneously adding sodium metavanadate and thioacetamide into deionized water to obtain a solution A; then, dropwise adding an aqueous ammonia solution into the solution A to obtain a solution B; pouring the solution B into a reaction liner, and then, carrying out sealing for a hydrothermal reaction; next, taking out a product cooled after being reacted, alternately cleaning the product by using water and alcohol, and then, collecting the product; and freezing the cleaned product, and then, drying the product to obtain the VOOH/VS4 micrometer composite powder. The VOOH/VS4 micrometer composite powder prepared according to the preparation method is composed of uniform spheroidal structures of which the diameters are about 10mu m, parts of spheroidal structures are gathered, the insides of microspheres are formed by self-stacking micrometer VS4 short rods of which the diameters are 0.5-1.0mu m and the length is 1.0-2.0mu m, and the outsides of the microspheres are randomly formed fromVOOH long rods having the diameters of 50-200nm and single-crystal structures. The VOOH/VS4 micrometer composite powder is applied to the fields of lithium/sodium ion batteries and photo/electric catalysis. The VOOH/VS4 micrometer composite powder shows excellent electrochemical properties and catalytic property when being applied as an anode material of a sodium/lithium ion battery and a photo/electric catalyst.

Description

technical field [0001] The invention relates to a vanadium-based compound composite powder and a preparation method thereof, in particular to a VOOH / VS 4 Micron composite powder and its preparation method and application. Background technique [0002] with large chain spacing One-dimensional chain green sulfur vanadium ore VS with weak chain interaction, high S content and low development cost 4 [Xu X, Jeong S, Rout CS, Oh P, Ko M, Kim H, et al. Lithium reaction mechanism high rate capability of VS 4 -graphene nanocomposite as an anodematerial for lithium batteries.J Mater ChemA.2014;2:10847-53.] is considered to have broader development prospects in the fields of energy storage and photo / electrocatalysis, and they have been used in photocatalysis, supercapacitors, sodium / Lithium-ion batteries and other fields have been applied. Currently, about VS 4 The reports mainly focus on the hydrothermal synthesis of pure phases and composite phases with carbon materials, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04H01M4/36H01M4/48H01M4/58H01M10/0525H01M10/054
CPCB01J27/04B01J35/0033B01J35/004H01M4/364H01M4/483H01M4/5815H01M10/0525H01M10/054Y02E60/10
Inventor 黄剑锋李文斌何枢薇曹丽云冯亮亮王娜畅珣伟范海鑫
Owner SHAANXI UNIV OF SCI & TECH
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