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Superlong vanadium dioxide nanowire film and preparation method thereof

A technology of vanadium dioxide nanometer and vanadium pentoxide, which is applied in the field of template-free ultra-long vanadium dioxide nanowire film and its preparation, can solve the problems of high production equipment requirements, high temperature, large energy consumption, etc. Chemical properties, large specific surface area, the effect of reducing the process

Inactive Publication Date: 2014-12-10
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are some methods for preparing vanadium dioxide nanowires, and the methods involved mainly include chemical vapor deposition, hydrothermal methods, etc., such as "vanadium dioxide nanowires and its preparation method and nanowires using vanadium dioxide nanowires." Device" (201010201121.4) technology, using titanium dioxide as a template to grow vanadium dioxide nanowires by chemical vapor deposition, this method requires high production equipment, high cost, and low yield
For example, the patented technology of "Preparation and Application of Rutile Phase Vanadium Dioxide Nanowires" (201010177821.4) uses sodium metavanadate as the vanadium source and prepares vanadium dioxide nanowires by hydrothermal reaction at a temperature of 200-350°C. The length range is 1-50μm. This method has high temperature and high energy consumption, and the vanadium dioxide has a short size and poor electron transport ability, which is not conducive to the use of vanadium dioxide nanowire films as flexible electrode materials in lithium batteries and supercapacitors. Wide application in fields such as

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  • Superlong vanadium dioxide nanowire film and preparation method thereof
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  • Superlong vanadium dioxide nanowire film and preparation method thereof

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Embodiment 1

[0032] A method for preparing a template-free vanadium dioxide ultra-long nanowire film. First weigh 0.05-0.5g of vanadium pentoxide, put it into a beaker, add 40ml of double distilled water into the beaker, stir vigorously, then take 0.1-3ml of hydrogen peroxide into the beaker, stir for 0.1-1h, and form an orange-red transparent solution , then add an oxalic acid solution with a mass volume concentration of 1.25-12.5g / L to the solution, stir for 5min-1h, then place the mixed solution evenly in a 60ml polytetrafluoroethylene lining, and the hydrothermal temperature is 80-120°C, The holding time is 96h, cooled naturally, the sample is washed with distilled water and ethanol, and dried at 60°C for 12h to obtain a vanadium dioxide ultra-long nanowire film. figure 1 For the XRD pattern of the sample tested, it can be known by analyzing and comparing the cards that the vanadium dioxide is B-phase vanadium dioxide, which is consistent with the card JCPDS Card No.81-2392. By consult...

Embodiment 2

[0034]A method for preparing a template-free vanadium dioxide ultra-long nanowire film. First weigh 0.05-0.5g of vanadium pentoxide, put it into a beaker, add 40ml of double distilled water into the beaker, stir vigorously, then take 0.1-3ml of hydrogen peroxide into the beaker, stir for 0.1-1h, and form an orange-red transparent solution , then add an oxalic acid solution with a mass volume concentration of 1.25-12.5g / L to the solution, stir for 5min-1h, then place the mixed solution in a 60ml polytetrafluoroethylene lining, heat the water at 120-180°C, and keep warm After 24 hours, cool naturally, wash the sample with distilled water and ethanol, and dry at 60° C. for 12 hours to obtain a vanadium dioxide ultralong nanowire film. image 3 , Figure 4 It is a scanning electron microscope picture of the sample. According to the picture, we can see that the vanadium dioxide nanowire has a diameter of 50-200nm and a length of 50μm-1cm.

Embodiment 3

[0036] A method for preparing a template-free vanadium dioxide ultra-long nanowire film. First weigh 0.5-3g of vanadium pentoxide, put it into a beaker, add 40ml of double distilled water into the beaker, stir vigorously, then take 3-6ml of hydrogen peroxide into the beaker, stir for 1-5h, and form an orange-red transparent solution. Then add oxalic acid solution with a mass volume concentration of 1.25-12.5g / L to the solution, stir for 5min-1h, then place the mixed solution in a 60ml polytetrafluoroethylene lining, the water heating time is 120-180°C, and the holding time After 48 hours, cool naturally, wash the sample with distilled water and ethanol, and dry at 60°C for 12 hours to obtain a vanadium dioxide ultralong nanowire film. The vanadium dioxide nanowire has a diameter of 50-300nm and a length of 50μm-2cm.

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Abstract

The invention particularly relates to a superlong vanadium dioxide nanowire film and a preparation method thereof. The technical scheme is as follows: the method comprises the following steps: dissolving vanadium pentoxide used as a vanadium source in oxydol, wherein the mass-volume ratio of the vanadium pentoxide to the oxydol is (0.05-5):(0.1-20) g / ml; adding distilled water, and stirring for 0.1-10 hours to form an orange-red transparent solution; adding a 1.25-125 g / L oxalic acid solution, and stirring for 5 minutes-1 hour; and finally, putting the uniformly mixed solution into a hydrothermal kettle, reacting at 80-200 DEG C for 6-96 hours, cooling to room temperature, washing, and carrying out vacuum drying to finally obtain the vanadium dioxide superlong nanowire film of which the length reaches nano scale. The preparation method is simple and reliable in technique; and the prepared superlong vanadium dioxide nanowire has the advantages of uniform distribution, high yield and controllable length, and is suitable for the field of electrochemistry.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite structures. Specifically relates to a template-free ultra-long vanadium dioxide nanowire film and a preparation method thereof. Background technique [0002] In recent years, nanomaterials have attracted extensive attention of researchers due to their great scientific value and potential application prospects. Theoretical and experimental studies have shown that nanomaterials exhibit superior properties compared to bulk materials. In particular, one-dimensional nanomaterials (such as nanowires and nanotubes) have one-dimensional electron transport channels, so they show more excellent photoelectrochemical properties than ordinary bulk materials. VO 2 It is a transition metal oxide with phase transition properties, and its phase transition temperature is 68°C. Due to its large theoretical capacity, stable chemical properties, low cost and other characteristics, and VO 2 It has a double-la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02B82Y30/00B82Y40/00
Inventor 高标霍开富潘志国付继江张旭明
Owner WUHAN UNIV OF SCI & TECH
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