Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Preparation method and application of tubular tungsten oxide-graphene composite material

A composite material and tungsten oxide technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, electrical devices, etc., to achieve improved performance, excellent temperature-sensitive characteristics, and quality controllable effects

Inactive Publication Date: 2017-06-20
NO 49 INST CHINESE ELECTRONICS SCI & TECH GRP +1
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no relevant literature in the existing technology to report a preparation method of a tubular tungsten oxide-graphene composite material and its application as a temperature-sensitive characteristic material for a temperature sensor.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method and application of tubular tungsten oxide-graphene composite material
  • Preparation method and application of tubular tungsten oxide-graphene composite material
  • Preparation method and application of tubular tungsten oxide-graphene composite material

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0024] Specific embodiment one: the preparation method of a kind of tubular tungsten oxide-graphene composite material of this embodiment is carried out according to the following steps:

[0025] One, the graphite powder is oxidized by the improved Hummers method to obtain graphite oxide powder;

[0026] 2. Ultrasonic disperse the graphite oxide powder obtained in step 1 in n-propanol, the ultrasonic frequency is 35kHz-45kHz, and the ultrasonic time is 0.5h-1.5h to obtain a dispersion solution, and then add tungsten hexachloride to the dispersion solution, wait After the tungsten hexachloride is completely dissolved, transfer the solution into the reactor for hydrothermal reaction to obtain a mixed solution; wherein the hydrothermal reaction temperature is 150-250°C, and the hydrothermal reaction time is 10h-14h;

[0027] The mass ratio of graphite oxide powder described in step 2 to n-propanol is 1 mg to 5 mg: 3 mL;

[0028] The volume ratio of the amount of tungsten hexachl...

specific Embodiment approach 2

[0031] Specific embodiment two: what this embodiment is different from specific embodiment one is: the specific process that the improved Hummers method is carried out oxidation to graphite in the step one is: 1. graphite powder is mixed with sodium nitrate, then add the concentrated sulfuric acid, stir in ice bath 1h, mixed solution A is obtained; the mass ratio of the graphite powder to sodium nitrate is 5:1.5; the mass ratio of the graphite powder to the concentrated sulfuric acid is 2g:67.5mL; Add potassium permanganate at a rate of 9g / h in the mixed solution A, continue the ice bath for 2h, then transfer to a water bath, and react for 120h at room temperature to obtain mixed solution B; the potassium permanganate and step 1. The mass ratio of described graphite powder is 9:2; 3. add the sulfuric acid that mass fraction is 5% in the mixed solution B that step 2. obtains, stir 2h, obtain mixed solution C; Described mass fraction is the sulfuric acid of 5% and step The volum...

specific Embodiment approach 3

[0032] Embodiment 3: This embodiment differs from Embodiment 1 to Embodiment 2 in that the volume ratio of the graphite oxide powder described in step 2 to n-propanol is 1 mg: 1 mL. Other steps and parameters are the same as those in the specific embodiment 1 to 2.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

A preparation method and an application of a tubular tungsten oxide-graphene composite material are disclosed. The invention belongs to the technical field of advanced materials, and specifically relates to a preparation method and an application of a tubular tungsten oxide-graphene composite material. The invention aims to enhance the temperature sensitivity of a graphene material by preparing a tungsten oxide-graphene composite material. The method comprises the following steps: (1) oxidizing graphite into graphite oxide powder; (2) ultrasonically dispersing the graphite oxide powder in normal propyl alcohol, and adding tungsten hexachloride for hydrothermal reaction; and (3) adjusting the pH value to 9-10, adding 50% aqueous solution of hydrazine hydrate, conducting reaction in oil bath, and carrying out centrifugal cleaning and drying after reaction to get black powder, namely, the tubular tungsten oxide-graphene composite material. The material can be used as a temperature-sensitive material of temperature sensors, a sensitive material of gas sensors or a photocatalytic degradation material.

Description

technical field [0001] The invention belongs to the technical field of advanced materials, and in particular relates to a preparation method and application of a tubular tungsten oxide-graphene composite material. Background technique [0002] As a typical transition metal oxide, tungsten oxide has potential application value in the fields of gas sensing and catalytic degradation. Different tungsten oxide nanostructures have been prepared by different synthesis methods: nanoclusters, nanorods, nanobelts, nanotubes, etc., which have been applied in some fields. However, there are still defects in the performance characteristics of pure tungsten oxide nanomaterials, which limit its application. [0003] Graphene with a single-layer carbon atom structure has a specific surface area of ​​up to 2600m 2 / g, the structure is very stable and has excellent conductivity. By compounding tungsten oxide and graphene materials, taking advantage of their respective characteristics, and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/00B01J23/30
CPCB01J23/30G01K7/00
Inventor 杨永超秦浩王洋洋金鹏飞刘继江周明军吴亚林
Owner NO 49 INST CHINESE ELECTRONICS SCI & TECH GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com