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VS[4] nanorod/VS[2] nanosheet three-dimensional self-assembly hollow rodlike composite powder and preparation method thereof

A technology of composite powders and nanosheets, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., to achieve the effects of high yield, low temperature and excellent electrochemical performance

Active Publication Date: 2018-11-02
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the known reports mainly deal with pure phase VS 4 and VS 2 Synthesis of the two, there is no report of compounding the two, let alone about VS 4 Nanorod / VS 2 Three-dimensional Self-Assembled Hollow Rod Composite Powders Reported by Nanosheets

Method used

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  • VS[4] nanorod/VS[2] nanosheet three-dimensional self-assembly hollow rodlike composite powder and preparation method thereof
  • VS[4] nanorod/VS[2] nanosheet three-dimensional self-assembly hollow rodlike composite powder and preparation method thereof
  • VS[4] nanorod/VS[2] nanosheet three-dimensional self-assembly hollow rodlike composite powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1: Add 0.5g of sodium metavanadate and 2.6g of thioacetamide to 60ml of absolute ethanol at the same time, stir at room temperature with 400r / min magnetic force to obtain a semi-clear solution A;

[0036]Step 2: Pour solution A into the reaction liner at a filling ratio of 58% and seal it, then install the liner in an outer kettle and fix it in a homogeneous reactor, and then at a speed of 8r / min, in React at 155°C for 26 hours;

[0037] Step 3: After the reaction, the reaction kettle is naturally cooled to room temperature, and then the product cooled after the reaction is taken out, and the product is collected after being alternately washed with water and alcohol for 3 times by means of suction filtration;

[0038] Step 4: Place the collected product in the cold well of a freeze dryer at -60°C, freeze for 2 hours, then place the frozen product in a tray, seal it with plastic wrap, and pierce the plastic wrap to ensure its Fully dry under low pressure conditions...

Embodiment 2

[0049] Step 1: Add 0.4g of sodium metavanadate and 2.7g of thioacetamide to 56ml of absolute ethanol at the same time, stir at room temperature with a magnetic force of 500r / min to obtain a semi-clear solution A;

[0050] Step 2: Pour solution A into the reaction liner at a filling ratio of 56% and seal it, then install the liner in the outer kettle and fix it in a homogeneous reactor, and then at a speed of 5r / min, in React at 160°C for 27h;

[0051] Step 3: After the reaction, the reaction kettle is naturally cooled to room temperature, and then the product cooled after the reaction is taken out, and the product is collected after being alternately washed with water and alcohol for 4 times by means of suction filtration;

[0052] Step 4: Place the collected product in the cold well of a freeze dryer at -50°C, freeze for 3 hours, then place the frozen product in a tray, seal it with plastic wrap, and pierce the plastic wrap to ensure its Fully dry under low pressure conditio...

Embodiment 3

[0054] Step 1: Add 0.55g of sodium metavanadate and 2.8g of thioacetamide to 58ml of absolute ethanol at the same time, stir at room temperature with 600r / min magnetic force to obtain a semi-clear solution A;

[0055] Step 2: Pour solution A into the reaction liner at a filling ratio of 60% and seal it, then install the liner in the outer kettle and fix it in a homogeneous reactor, and then at a speed of 10r / min, in Reaction at 165°C for 28h;

[0056] Step 3: After the reaction, the reaction kettle is naturally cooled to room temperature, and then the product cooled after the reaction is taken out, and the product is collected after being alternately washed with water and alcohol for 5 times by suction filtration;

[0057] Step 4: Place the collected product in the cold well of a freeze dryer at -45°C, freeze for 4 hours, then place the frozen product in a tray, seal it with plastic wrap, and pierce the plastic wrap to ensure its Fully dry under low pressure conditions, then ...

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Abstract

The invention relates to VS[4] nanorod / VS[2] nanosheet three-dimensional self-assembly hollow rodlike composite powder and a preparation method thereof. According to the preparation method, ethyl alcohol is taken as a solvent, sodium metavanadate and thioacetamide are respectively taken as a vanadium source and a sulfur source, and by synergistically controlling the parameters such as concentration, ratio, reaction temperature, reaction time, reaction pH value and packing ratio of the ethyl alcohol, the sodium metavanadate and the thioacetamide, the in-situ generation of uniform distribution of the VS[4] nanorods / VS[2] nanosheets self-assembly hollow rodlike structures is realized by a one-step solvothermal method. The method is simple in reaction process, low in temperature, easy to control, does not require large-sized equipment or harsh reaction condition and can simultaneously realize a structure which is formed through combining two materials in a specific mode in the reaction process. When used as a lithium / sodium ion battery negative electrode material and an optical / electrical catalyst, the product can have excellent electrochemical performance and catalytic performance.

Description

technical field [0001] The invention relates to a vanadium-based sulfide composite powder and a preparation method thereof, in particular to a VS 4 Nanorod / VS 2 Nanosheet three-dimensional self-assembled hollow rod-shaped composite powder and its preparation method. 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 and high rate capability of VS 4 -graphene nanocomposite as an anodematerial for lithium batteries.J Mater Chem A.2014;2:10847-53.] is considered to have broad development prospects in the fields of energy storage and photo / electrocatalysis, and they have been used in photocatalysis, supercapacitors, Lithium / sodium ion batteries and other fields have been applied. Metallic VS with excellent conductivity 2 Has excellent electron transport properties, and VS...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G31/00C01P2002/72C01P2004/03C01P2004/04C01P2004/61C01P2004/82
Inventor 黄剑锋李文斌冯亮亮曹丽云何枢薇王娜范海鑫
Owner SHAANXI UNIV OF SCI & TECH
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