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Ultra-small nanosheet self-assembled flower-like VS2 powder and preparation method thereof

An ultra-small nanometer, self-assembly technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., to achieve the effect of high yield, uniform chemical composition, and no post-processing

Inactive Publication Date: 2018-09-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the previous about VS 2 In the reports of hydrothermal / solvothermal synthesis, the solvents used are mainly water and ethanol, and there are few reports using nitrogen methyl pyrrolidone as a solvent

Method used

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  • Ultra-small nanosheet self-assembled flower-like VS2 powder and preparation method thereof
  • Ultra-small nanosheet self-assembled flower-like VS2 powder and preparation method thereof
  • Ultra-small nanosheet self-assembled flower-like VS2 powder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Step 1: Add 1.0 g of sodium metavanadate and 3.6 g of thioacetamide to 50 ml of nitrogen methyl pyrrolidone at the same time, and magnetically stir at a speed of 500 r / min at room temperature to obtain solution A;

[0037] Step 2: Pour solution A into the reaction liner at a filling ratio of 50% and seal it, then install the liner in the outer kettle and fix it in a homogeneous reactor, and then under the condition of a rotating speed of 10r / min, React at 180°C for 24h;

[0038] 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;

[0039] Step 4: Place the collected product in the cold well of a freeze dryer at -50°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 Fu...

Embodiment 2

[0051] Step 1: Add 0.9 g of sodium metavanadate and 3.4 g of thioacetamide to 48 ml of nitrogen methyl pyrrolidone at the same time, and magnetically stir at a speed of 400 r / min at room temperature to obtain solution A;

[0052] Step 2: Pour solution A into the reaction liner at a filling ratio of 49% and seal it, then install the liner in an outer kettle and fix it in a homogeneous reactor, and then under the condition of a rotating speed of 8r / min, React at 175°C for 25h;

[0053] 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;

[0054] Step 4: Place the collected product in the cold well of a freeze dryer at -40°C, freeze for 5 hours, then place the frozen product in a tray, seal it with plastic wrap, and pierce the plastic wrap to ensure its Full...

Embodiment 3

[0056] Step 1: Add 1.1 g of sodium metavanadate and 3.8 g of thioacetamide to 52 ml of nitrogen methyl pyrrolidone at the same time, and magnetically stir at a speed of 600 r / min at room temperature to obtain solution A;

[0057] Step 2: Pour solution A into the reaction liner at a filling ratio of 52% and seal it, then install the liner in an outer kettle and fix it in a homogeneous reactor, and then at a speed of 5 r / min, React at 185°C for 23h;

[0058] 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;

[0059] 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, ...

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Abstract

The invention relates to an ultra-small nanosheet self-assembled flower-like VS2 powder and a preparation method thereof. The one-step preparation of ultra-small nanosheet self-assembled flower-like VS2 powder is realized by adopting a solvothermal method, using nitrogen methylpyrrolidone as a solvent, respectively using sodium metavanadate and thioacetamide as a vanadium source and a sulfur source, and synergistically controlling the concentration and ratio, reaction temperature and reaction time. The method has the advantages of simple reaction process, low temperature, and easy control, does not require large equipment and harsh reaction conditions, can generate ultra-small and ultra-thin VS2 nanosheets through a structural regulation function of the solvent, and allows the nanosheets to be self-assembled into small-scale flower-like structures in a specific manner. When being applied as a sodium / lithium ion battery negative electrode material and a photo / electrocatalyst, the aboveproduct can exhibit excellent electrochemical performances and catalytic performances.

Description

technical field [0001] The present invention relates to a VS 2 Powder and preparation method thereof, specifically relating to a self-assembled flower-like VS of ultra-small nanosheets 2 Powder and its preparation method. Background technique [0002] Transition metal dichalcogenides such as MoS 2 、WS 2 and VS 2 Such unique physical and chemical properties and crystal structure make them a very promising lithium / sodium ion battery electrode material and photocatalytic material [Yang E, Ji H, JungY.Two-Dimensional Transition Metal Dichalcogenide Monolayers as Promising Sodium Ion Battery Anodes. J Phys Chem C. 2015; 119:26374-80]. Although recent studies have shown that MoS 2 and WS 2 Can exhibit excellent electrochemical and catalytic performance, but the poor electron transport caused by semiconducting limits their further development. As a typical member of the transition metal dichalcogenide family, the metallic state VS with excellent conductivity 2 It will exhi...

Claims

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Application Information

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IPC IPC(8): C01G31/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G31/00C01P2002/72C01P2002/80C01P2004/03C01P2004/04C01P2004/30
Inventor 黄剑锋李文斌冯亮亮曹丽云任一杰范海鑫王娜
Owner SHAANXI UNIV OF SCI & TECH
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