Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of pvp aggregation sno 2 -Graphene airgel and preparation method thereof

A graphene aerogel and graphene technology, applied in the field of preparation of nanoporous materials and polymer materials, can solve the problems of inability to detect gas, high detection limit, difficult application, etc., achieve mechanical properties improvement, and improve reaction purity , highly responsive effect

Active Publication Date: 2022-04-22
江苏安珈新材料科技有限公司
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Shiva Navazani and others from the Advanced Materials and Nanotechnology Research Laboratory of Tusi University of Science and Technology in "Facilesynthesis of a SnO 2 @rGO nanohybrid and optimization of its methane-sensing parameters" proposed to combine graphene and SnO 2 The gas-sensing effect of the nanocomposite on methane gas can reach a very good ideal value, but due to its high detectable limit, it cannot detect gas under extreme conditions, so it is difficult to apply

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
  • A kind of pvp aggregation sno <sub>2</sub> -Graphene airgel and preparation method thereof
  • A kind of pvp aggregation sno <sub>2</sub> -Graphene airgel and preparation method thereof
  • A kind of pvp aggregation sno <sub>2</sub> -Graphene airgel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 12ml of a graphene oxide aqueous solution with a concentration of 2mg / ml (Suzhou Hengqiu Technology (China Graphene) Co., Ltd.) into a mixed solution of 20ml of deionized water and 6ml of ethanol, and perform ultrasonic treatment for 30min. Weigh 0.35g of tin tetrachloride pentahydrate and 0.256g of urea with an electronic balance again, after stirring the solution for 30min at a speed of 300rpm, add 4mL of concentrated hydrochloric acid (4mol / L) dropwise at a speed of 0.1mL / s, and stir for 60min Then add 0.63g of PVP, increase the temperature to 40°C and increase the stirring speed to 600rpm, stir for 120min, pour into a hydrothermal reactor with a volume of 50mL, and react at 180°C for 24h. After the reaction kettle is cooled to room temperature, the gel is taken out, immersed in a mixed solution with an alcohol-water ratio of 1:5 for aging, and the aging solution is replaced on time every day, and the aging process lasts for 5 days. Place the sample in a 10mL sma...

Embodiment 2

[0037] 8 ml of graphene oxide aqueous solution with a concentration of 3 mg / ml was added to a mixed solution of 22 ml of deionized water and 8 ml of ethanol, and ultrasonically treated for 25 min. Then weigh 0.41g of tin tetrachloride pentahydrate and 0.384g of urea with an electronic balance, after stirring the solution for 25min at a speed of 350rpm, add 3mL of concentrated hydrochloric acid (4 mol / L) dropwise at a speed of 0.15mL / s, and stir Add 0.76g of PVP after 50min, increase the temperature to 45°C and increase the stirring speed to 650rpm, stir for 100min, pour into a hydrothermal reactor with a volume of 50mL, and react at 185°C for 22h. After the reaction kettle is cooled to room temperature, the gel is taken out, immersed in a mixed solution with an alcohol-water ratio of 1:4 for aging, and the aging solution is replaced on time every day, and the aging process lasts for 4 days. Place the sample in a 10mL small beaker and put it into a freeze dryer for drying. The ...

Embodiment 3

[0039] Add 6 ml of graphene oxide aqueous solution with a concentration of 4 mg / ml into a mixed solution of 24 ml of deionized water and 9 ml of ethanol, and perform ultrasonic treatment for 20 min. Weigh 0.48g of tin tetrachloride and 0.512g of sodium bicarbonate with an electronic balance again, after stirring the solution for 20min at a speed of 400rpm, add 5mL of concentrated nitric acid (4 mol / L) dropwise at a speed of 0.12mL / s, and stir Add 0.95g of PVP after 40min, increase the temperature to 50°C and increase the stirring speed to 700rpm, stir for 80min, pour into a hydrothermal reactor with a volume of 50mL, and react at 190°C for 20h. After the reaction kettle is cooled to room temperature, the gel is taken out, immersed in a mixed solution with an alcohol-water ratio of 1:6 for aging, and the aging solution is replaced on time every day, and the aging process lasts for 4 days. Place the sample in a 10mL small beaker and put it into a freeze dryer for drying. The dry...

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
densityaaaaaaaaaa
angleaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a PVP polymerized SnO 2 ‑Graphene airgel and its preparation method, the graphene oxide aqueous solution is added to the mixture of alcohol and deionized water, after the ultrasonic dispersion is uniform, the tin source, reducing agent and modifier are added in sequence, stirred evenly, and then added Polyvinylpyrrolidone, heat up under stirring to obtain SnO 2 ‑Graphene sol; then placed in a hydrothermal reactor to react to obtain SnO 2 ‑Graphene hydrogel, then immerse it in the aging solution for aging until the film is released, and finally freeze-dry it. The PVP polymerized SnO prepared by the present invention 2 ‑Graphene airgel density is 0.12~0.23g / cm 3 , the hydrophobic angle is 108°~127°, the gas response time at room temperature is 61~127s, and the responsivity is 28~41%.

Description

technical field [0001] The invention belongs to the field of preparation technology of nanoporous materials and polymer materials, and relates to a PVP polymerized SnO 2 - Graphene airgel and its preparation method. Background technique [0002] Graphene airgel is a nanoporous three-dimensional network structure material with high specific surface area and high porosity. With its extremely high carrier mobility and mechanical properties, it can be used for the detection of chemical sensitivity and biological sensitivity. However, its sensitivity is still limited. [0003] SnO 2 It is a typical n-type semiconductor with an energy band gap of 3.6eV at a temperature of 300K. It has broad prospects for detecting NOx, a harmful gas easily produced in traffic exhaust, coal mines and petroleum industries. However, due to problems such as small component size, difficult assembly, and high density, SnO 2 At higher operating temperatures (usually higher than 100°C), it is difficul...

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 Patents(China)
IPC IPC(8): B01J13/00C01G19/02
CPCB01J13/0091C01G19/02
Inventor 沈晓冬严文倩朱昆萌崔升彭长鑫
Owner 江苏安珈新材料科技有限公司