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Overlong vanadium pentoxide nanowire harness with hierarchical structure and preparation method thereof

A technology of vanadium pentoxide nano and vanadium pentoxide, which is applied in the field of super-long vanadium pentoxide nanowire bundles with hierarchical structure and its preparation, which can solve the problems of limited application and promotion, complex construction process, etc., and reduce the production cost , high flexibility, and the effect of simplifying the manufacturing process

Inactive Publication Date: 2013-04-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its complex construction process, it requires a variety of advanced high-end technologies and equipment, which greatly limits its application and promotion.

Method used

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  • Overlong vanadium pentoxide nanowire harness with hierarchical structure and preparation method thereof
  • Overlong vanadium pentoxide nanowire harness with hierarchical structure and preparation method thereof
  • Overlong vanadium pentoxide nanowire harness with hierarchical structure and preparation method thereof

Examples

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Effect test

Embodiment 1

[0023] The preparation of ultra-long vanadium pentoxide nanowire bundles with hierarchical structure, the specific steps are as follows:

[0024] 1) Put 10 g of vanadium pentoxide powder into a crucible, raise the temperature of the muffle furnace to 800 °C, put the crucible in the muffle furnace for 30 min to melt the vanadium pentoxide, and melt the molten vanadium pentoxide Pour into 1000 ml of deionized water to quench, the resulting liquid is heated to boiling and stirred clockwise, after cooling, it is suction filtered, and the filtrate is allowed to stand for seven days to obtain a vanadium pentoxide sol with a nominal concentration of 0.9707 wt %;

[0025] 2) Measure 40 ml of the sol obtained in step 1), put it into a reactor with a capacity of 50 ml, and react at 180°C for 2 days to obtain a suspension containing ultra-long vanadium pentoxide nanowires;

[0026] 3) Extend the glass fiber with a diameter of 0.5 mm into the suspension obtained in step 2), and pull i...

Embodiment 2

[0030] The preparation of ultra-long vanadium pentoxide nanowire bundles with hierarchical structure, the specific steps are as follows:

[0031] 1) Put 10 g of vanadium pentoxide powder into a crucible, raise the temperature of the muffle furnace to 800 °C, put the crucible in the muffle furnace for 30 min to melt the vanadium pentoxide, and melt the molten vanadium pentoxide Quickly pour into 1400 ml deionized water to quench, the obtained liquid is heated to boiling and stirred clockwise, after cooling, it is suction filtered, and the filtrate is allowed to stand for seven days to obtain vanadium pentoxide sol, with a nominal concentration of 0.7087 wt %;

[0032] 2) Measure 40 ml of the sol obtained in step 1), put it into a reactor with a capacity of 50 ml, and react at 200°C for 4 days to obtain a suspension containing ultra-long vanadium pentoxide nanowires;

[0033] 3) Extend the glass fiber with a diameter of 0.5 mm into the suspension obtained in step 2), and pull it...

Embodiment 3

[0036] The preparation of ultra-long vanadium pentoxide nanowire bundles with hierarchical structure, the specific steps are as follows:

[0037] 1) Put 10 g of vanadium pentoxide powder into a crucible, raise the temperature of the muffle furnace to 800 °C, put the crucible in the muffle furnace for 30 min to melt the vanadium pentoxide, and melt the molten vanadium pentoxide Quickly pour into 1200 ml deionized water to quench, the obtained liquid is heated to boiling and stirred clockwise, after cooling, it is suction filtered, and the filtrate is allowed to stand for seven days to obtain a vanadium pentoxide sol with a nominal concentration of 0.8840 wt %;

[0038]2) Measure 40 ml of the sol obtained in step 1), put it into a reactor with a capacity of 50 ml, and react at 180°C for 2.5 days to obtain a suspension containing ultra-long vanadium pentoxide nanowires;

[0039] 3) Extend the glass fiber with a diameter of 0.5 mm into the suspension obtained in step 2), and pull ...

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Abstract

The invention provides an overlong vanadium pentoxide nanowire harness with a hierarchical structure and a preparation method thereof. The length of the wire harness is not shorter than 10 cm; the diameter of the wire harness is 1-3 microns; the wire harness comprises parallel overlong nanowires; the diameters of the nanowires are 20-30 nm and the lengths of the nanowires are longer than 100 microns to 1 mm. The preparation method comprises the following steps: preparing a vanadium pentoxide sol by using a melting and quenching method; putting 40 ml sol to a reaction kettle; reacting the sol for 2-4 days under a condition of 160-200 DEG C so as to obtain a suspension containing overlong vanadium pentoxide nanowires; enabling a slender glass fiber to extend into the vanadium pentoxide nanowire suspension; lifting the slender glass fiber at a constant speed so as to obtain the wire harness; drying the obtained wire harness; carrying out heat treatment on the wire harness under an air atmosphere under a condition of 400-600 DEG C; and finally obtaining the overlong vanadium pentoxide nanowire harness with the hierarchical structure. A gas sensitive device assembled by using materials has the advantages of rapid response, good stability, sensitivity of 2.6 and low working temperature of 60 DEG C.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials and gas sensors, and in particular relates to a superlong vanadium pentoxide nanowire bundle with a hierarchical structure and a preparation method thereof. The material can be used to prepare a high-sensitivity gas sensor. Background technique [0002] Gas sensors currently have very broad application prospects in the fields of safety production, energy saving and emission reduction, environmental protection, road traffic safety management, aerospace, modern military, chemical defense and anti-terrorism. With the development of nanotechnology, nanomaterials are used in gas sensors. The application of the gas sensor has greatly improved the performance and application range of the gas sensor. Among them, one-dimensional metal oxide nanomaterials have their unique structures and properties, such as transistor field effect, surface effect and small size effect, etc., which have become...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82Y30/00C01G31/02
Inventor 陈文安黎金伟祁琰媛杨爽邓荣
Owner WUHAN UNIV OF TECH
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