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Slice self-assembly microrod-like VS2 nano-powder and preparation method thereof

A nano-powder, micro-rod technology, applied in nanotechnology, chemical instruments and methods, inorganic chemistry and other directions, can solve the problems of inefficiency, complex synthesis process, high cost, etc., achieve low temperature, simple reaction process, low synthesis effect of temperature

Inactive Publication Date: 2018-11-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, these composited materials need to be prepared or purchased separately, making the whole synthesis process complicated, inefficient and costly

Method used

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  • Slice self-assembly microrod-like VS2 nano-powder and preparation method thereof
  • Slice self-assembly microrod-like VS2 nano-powder and preparation method thereof
  • Slice self-assembly microrod-like VS2 nano-powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Step 1: Take 1.0g of sodium metavanadate and 1.5g of thioacetamide and add it to 58ml of absolute ethanol at the same time, and stir it with 400r / min magnetic force at room temperature to obtain a semi-clear solution A;

[0038] 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 under the condition of a rotating speed of 8r / min, React at 180°C for 24h;

[0039] 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;

[0040] 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 ...

Embodiment 2

[0049] Step 1: Add 0.9g of sodium metavanadate and 1.4g of thioacetamide to 56ml of absolute ethanol at the same time, stir at room temperature with 500r / min magnetic force 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 an outer kettle and fix it in a homogeneous reactor, and then under the condition of a rotating speed of 5r / min, React at 175°C for 25h;

[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 l...

Embodiment 3

[0054] Step 1: Add 1.05g of sodium metavanadate and 1.45g of thioacetamide to 57ml of absolute ethanol at the same time, stir at room temperature with 450r / 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 an outer kettle and fix it in a homogeneous reactor, and then under the condition of a rotating speed of 7r / min, React at 185°C for 23h;

[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 by washing alternately with water and alcohol in a centrifugal manner for 5 times;

[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 c...

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Abstract

The invention discloses slice self-assembly microrod-like VS2 nano-powder and a preparation method thereof. The slice self-assembly microrod-like VS2 nano-powder is prepared by a simple one-step solvothermal method, water serves as a solvent, sodium metavanadate and thioacetamide serve as a vanadium source and a sulfur source, parameters such as the concentration and the ratio of materials, reaction temperature, reaction time, reaction packing ratio, solvothermal modes and drying modes are cooperatively controlled, particularly, the parameter of the weight of the sodium metavanadate and the thioacetamide is strictly controlled, and the slice self-assembly microrod-like VS2 nano-powder can be prepared by the one-step solvothermal method. According to the method, the reaction process is simple and easily controlled, the temperature is low, large equipment and extreme reaction conditions are omitted, and controllable self-assembly of ultrathin VS2 nano-sheets can be realized. When the product is used as a sodium / lithium ion battery negative electrode material and a photo / electro-catalyst, excellent electrochemical performances and catalytic performances can be shown.

Description

technical field [0001] The present invention relates to a VS 2 Nano-powder and its preparation method, in particular to a thin-sheet self-assembled micro-rod VS 2 Nanopowder and its preparation method. Background technique [0002] Transition metal dichalcogenides such as MoS 2 、WS 2 and VS 2 The large interlayer space of the layered structure makes them a very promising anode material for Li / Na-ion batteries. Although recent studies have shown that MoS 2 and WS 2 They can exhibit excellent Li / Na storage 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 exhibit excellent electron transport performance during cycling. At the same time, VS 2 The spatial distance between layers is It can provide sufficient space for the intercalation of Li / Na ions, and the weak van der Waals connection be...

Claims

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Application Information

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IPC IPC(8): C01G31/00B82Y40/00H01M4/58B01J27/04B01J35/10
CPCH01M4/5815B82Y40/00C01G31/00B01J27/04C01P2004/24C01P2004/03C01P2004/04C01P2004/10C01P2002/72C01P2004/61C01P2004/64C01P2004/50B01J35/33B01J35/61B01J35/39Y02E60/10
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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