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

Room-temperature high-sensitivity ammonia sensitive element based on tungsten oxide-polypyrrole core-sheath nano-wires

A technology of sensitive ammonia-sensitive components and tungsten oxide nanowires, which is applied in the field of high-sensitivity ammonia-sensitive components at room temperature, and can solve problems such as unstable performance of core-shell materials

Inactive Publication Date: 2018-07-20
TIANJIN UNIV
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention overcomes the deficiencies in the prior art, and provides a room-temperature high-sensitivity ammonia-sensitive element based on tungsten oxide-polypyrrole core-sheath nanowires, and realizes pyrrole on the surface of one-dimensional nanowires through an optimized pyrrole polymerization process. Uniform polymerization to prepare one-dimensional tungsten oxide / polypyrrole core-shell heterostructure nanowires with uniform polypyrrole shell coverage and controllable shell morphology Unstable properties of core-shell materials caused by poor controllability of appearance

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
  • Room-temperature high-sensitivity ammonia sensitive element based on tungsten oxide-polypyrrole core-sheath nano-wires
  • Room-temperature high-sensitivity ammonia sensitive element based on tungsten oxide-polypyrrole core-sheath nano-wires
  • Room-temperature high-sensitivity ammonia sensitive element based on tungsten oxide-polypyrrole core-sheath nano-wires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of tungsten oxide nanowires by solvothermal method

[0034]Add tungsten hexachloride powder into 60ml of cyclohexanol, and stir it magnetically for 20 minutes to completely dissolve the tungsten hexachloride powder to obtain a uniform solution with a concentration of tungsten hexachloride of 0.005mol / L. Transfer the cyclohexanol solution of tungsten hexachloride to a high-pressure reaction kettle lined with polytetrafluoroethylene. After sealing, place the reaction kettle in an oven to heat for solvothermal reaction. The working temperature of the oven is 200°C, and the heating time is for 6h.

[0035] (2) Cleaning of tungsten oxide nanowires

[0036] After the solvothermal reaction was completed, the autoclave was naturally cooled to room temperature, and the reaction kettle was taken out, and the blue solid-liquid reactant in the reaction kettle was centrifuged, and the speed of the centrifuge was set at 5000r / min. The solid obtained by centrifugatio...

Embodiment 2

[0043] (1) Preparation of tungsten oxide nanowires by solvothermal method

[0044] Add tungsten hexachloride powder into 60ml of cyclohexanol, and stir magnetically for 10 minutes to completely dissolve the tungsten hexachloride powder to obtain a uniform solution with a concentration of tungsten hexachloride of 0.005mol / L. Transfer the cyclohexanol solution of tungsten hexachloride to a high-pressure reaction kettle lined with polytetrafluoroethylene. After sealing, place the reaction kettle in an oven to heat for solvothermal reaction. The working temperature of the oven is 180°C, and the heating time is for 9h.

[0045] (2) Cleaning of tungsten oxide nanowires

[0046] After the solvothermal reaction was completed, the high-pressure reactor was naturally cooled to room temperature, and the reactor was taken out, and the blue solid-liquid reactant in the reactor was centrifuged, and the centrifuge speed was set to 4000r / min. The solid obtained by centrifugation was washed ...

Embodiment 3

[0054] (1) Preparation of tungsten oxide nanowires by solvothermal method

[0055] Add tungsten hexachloride powder into 60ml of cyclohexanol, and stir it magnetically for 40 minutes to completely dissolve the tungsten hexachloride powder, and obtain a uniform solution with a concentration of tungsten hexachloride of 0.005mol / L. Transfer the cyclohexanol solution of tungsten hexachloride to a high-pressure reactor lined with polytetrafluoroethylene. After sealing, place the reactor in an oven to heat for solvothermal reaction. The working temperature of the oven is 220°C, and the heating time is for 7h.

[0056] (2) Cleaning of tungsten oxide nanowires

[0057] After the solvothermal reaction was completed, the autoclave was naturally cooled to room temperature, and the reaction kettle was taken out, and the blue solid-liquid reactant in the reaction kettle was centrifuged, and the speed of the centrifuge was set at 6000r / min. The solid obtained by centrifugation was washed ...

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
Lengthaaaaaaaaaa
Thicknessaaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a room-temperature high-sensitivity ammonia sensitive element based on tungsten oxide-polypyrrole core-sheath nano-wires. The preparation method comprises: dissolving sodium dodecylbenzenesulfonate in deionized water to obtain a sodium dodecylbenzenesulfonate solution; dissolving a pyrrole monomer in absolute ethanol, uniformly mixing, and adding the obtained solution to the sodium dodecylbenzenesulfonate solution in a dropwise manner; continuously stirring; adding a tungsten oxide nano-wire solution into the mixed solution in a dropwise manner; adjusting the pH value of the obtained mixing solution to 1-4 by adding concentrated hydrochloric acid in a dropwise manner to obtain a polymerization reaction solution; adding an ammonium persulfate solution into the polymerization reaction solution in a dropwise manner, and carrying out centrifugal washing; and completely diluting and dispersing the polymerization product W18O49@PPy core sheath nano-wires by using absolute ethanol, and carrying out rotary coating on an electrode substrate to from one-dimensional W18O49@PPy core-sheath heterogeneous nano-wires with characteristics of uniform polypyrrole sheath layercovering and adjustable sheath layer morphology so as to construct a sensor sensitive element, such that the ammonia sensitive gas sensing element with characteristics of high sensitivity at room temperature and fast response recovery is obtained.

Description

technical field [0001] The invention belongs to the technical field of one-dimensional structure inorganic / organic heterogeneous nanocomposite materials, and more specifically relates to a room-temperature high-sensitivity ammonia-sensitive element based on tungsten oxide-polypyrrole core-sheath nanowires. Background technique [0002] At present, non-renewable energy sources are decreasing day by day, and the atmospheric environment is gradually deteriorating. In the face of energy shortage and increasingly serious air pollution, the development and utilization of renewable energy and the reliable detection of toxic and harmful gases have become increasingly urgent. With the development of material science, low-dimensional nanomaterials have been widely concerned and applied in the fields of energy and environment due to their unique characteristics. [0003] Low-dimensional nanomaterials include zero-dimensional, one-dimensional and two-dimensional materials. Due to its ...

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
IPC IPC(8): G01N27/04
CPCG01N27/04
Inventor 秦玉香张天一王克行王泽峰
Owner TIANJIN UNIV
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