Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Polyaniline/graphene capsule three-dimensional hollow hybrid structure as well as preparation method and application thereof

A graphene and polyaniline technology, applied in the field of gas sensors, can solve problems such as high working temperature, hindering commercial application, unstable chemical properties of metal oxides, etc., to achieve rapid response improvement, which is conducive to rapid response and recovery, Effect of Excellent Response Characteristics and Sensitivity

Active Publication Date: 2019-11-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, metal oxides are chemically unstable and require high operating temperatures, which greatly hinders their commercial application.

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
  • Polyaniline/graphene capsule three-dimensional hollow hybrid structure as well as preparation method and application thereof
  • Polyaniline/graphene capsule three-dimensional hollow hybrid structure as well as preparation method and application thereof
  • Polyaniline/graphene capsule three-dimensional hollow hybrid structure as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of preparation method of polyaniline / graphene capsule (PANI / GCs) three-dimensional hollow hybrid structure, comprises the following steps:

[0037]Step 1, using chemical vapor deposition (CVD), using nano-zinc oxide particles as a template, and acetylene as a carbon source to prepare graphene capsules;

[0038] 1.1. Put 20g of nano-ZnO particles into a quartz tube, place the quartz tube in a rotary CVD furnace with a rotation speed of 5 rpm, and heat it to 650 °C at a rate of 10 °C / min in an argon atmosphere. , with the gas flow rate of 30mL / min, acetylene gas was introduced as the reaction gas, and the reaction time was 30min. After the reaction was completed, it was naturally cooled to room temperature under an argon atmosphere, and the product was taken out to grow coated graphene on the surface of nano-ZnO particles. Nanolayers, resulting in graphene / zinc oxide composites;

[0039] 1.2. Soak the product obtained in step 1 in nitric acid (in nitric acid solut...

Embodiment 2

[0045] Compared with embodiment 1, this embodiment differs in that:

[0046] The specific process of step 2 is: take 3 mg of the graphene capsule GCs prepared in step 1 and disperse them in 100 mL of deionized water, and ultrasonically disperse them evenly, and place the obtained dispersion in an ice bath at 0°C.

Embodiment 3

[0048] Compared with embodiment 1, this embodiment differs in that:

[0049] The specific process of step 2 is: take 9 mg of the graphene capsule GCs prepared in step 1 and disperse them in 100 mL of deionized water, and ultrasonically disperse them evenly, and place the obtained dispersion in an ice bath at 0°C.

[0050] The mixed solution after the complete reaction of Example 1, Example 2 and Example 3 was washed alternately with deionized water and ethanol six times respectively. During the washing process, the centrifugal speed of the centrifuge was set to 3800r / min, so that the suspension After centrifugal separation, the obtained samples were dried at 80° C., and were respectively recorded as PANI / GCs-1 (Example 1), PANI / GCs-3 (Example 2) and PANI / GCs-9 (Example 3).

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a polyaniline / graphene capsule three-dimensional hollow hybrid structure as well as a preparation method and application thereof, and belongs to the technical field of resistive gas sensors. In the polyaniline / graphene capsule three-dimensional hollow hybrid structure, a graphene capsule is of a hollow opening structure, polyaniline nanoparticles are polymerized on the inner surface and the outer surface of the graphene capsule in situ and form pi-pi bond conjugation with the graphene capsule, and the particle size of the polyaniline nanoparticles is 18-40 nm. The graphene capsule is of a hollow open capsule structure; the bent part of the capsule has many five-membered ring, seven-membered ring and other heterocyclic structures, and pi-pi bond conjugation effect can be formed with polyaniline, and therefore, polyaniline is not simply attached to the inner surface and the outer surface of the graphene capsule, but forms relatively strong chemical bond effect, and selective surface growth of polyaniline is realized, so that the three-dimensional hollow hybrid structure is more stable, carrier transmission is more convenient, and rapid response to gas and improvement of sensitivity are facilitated.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to a polyaniline / graphene capsule three-dimensional hollow hybrid structure, a preparation method thereof, and an application in gas sensors. Background technique [0002] The development of low-cost, high-reliability and fast-response gas-sensitive materials and gas-sensitive sensors has become a research hotspot. It is widely used in the monitoring of health, industry, military and environmental fields, and provides protection for human safety in production and life. At present, gas sensor materials mainly include metal oxides, conductive polymers and carbon-based materials. Among them, metal oxides are chemically unstable and require high operating temperatures, which greatly hinders their commercial application. Conductive polymers and carbon-based materials have received extensive attention from researchers because of their low cost, high reliability, unique nanostructures...

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): B01J13/14C08G73/02C08K3/04C08K3/22G01N27/12
CPCB01J13/14C08G73/0266C08K3/22C08K2003/2296C08K2201/001C08K2201/011C08K3/042G01N27/126G01N27/127
Inventor 简贤王红聂松李涵
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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