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

Method for preparing graphene with leaf extraction solution serving as reductant

A technology of extracting liquid and graphene, applied in the direction of graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of graphene agglomeration, high toxicity and danger, affecting application, etc., and achieve good dispersibility and good stability. and the effect of conductivity

Inactive Publication Date: 2017-09-12
FUJIAN NORMAL UNIV
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used reducing agents include hydrazine and its derivatives, sodium borohydride, lithium aluminum hydride and hydroquinone, etc. However, these reducing agents are highly toxic and dangerous, especially hydrazine and its derivatives, which are only in trace amounts there is a harmful effect
And after the reaction, these hazardous wastes will be processed, which will greatly increase the cost of industrial scale.
In addition, graphene synthesized by these reducing agents is extremely prone to agglomeration without the addition of co-solvents
In conclusion, these deficiencies will seriously affect its application in many fields
[0003] The latest research has found that graphene nanomaterials have great potential in the fields of drug delivery, microbial fuel cells, biodetection, and tissue engineering biomedicine, but graphene synthesized by the above redox methods is prone to agglomeration and poor biocompatibility. shortcoming

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
  • Method for preparing graphene with leaf extraction solution serving as reductant
  • Method for preparing graphene with leaf extraction solution serving as reductant
  • Method for preparing graphene with leaf extraction solution serving as reductant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing graphene with leaf extract as reducing agent, the specific steps are:

[0026] 1) Take 2.00 g of graphite powder with a size of 800 mesh and add it to 35 mL of concentrated sulfuric acid, stir evenly for 2 h to obtain a mixed solution; slowly add 6 g of KMnO 4 , keep the temperature of the mixture below 20°C during the addition process; then place it in a water bath at 35°C for 4 hours, slowly add 90 mL of deionized water to dilute, and stir thoroughly for 1 hour to obtain a dark brown suspension; then Gradually add 30wt% H 2 o 2 , until the color turned bright yellow, and filtered while hot; then washed with 5wt% HCl solution to remove the manganese ions and make the solution neutral, and then dispersed by ultrasonic waves, freeze-dried for 48 h, that is Solid graphene oxide can be obtained;

[0027] 2) Weigh 1.00 g of dried grape leaves, cut them into pieces and put them into a beaker filled with 200 mL of distilled water, then place them in ...

Embodiment 2

[0030] A method for preparing graphene with leaf extract as reducing agent, the specific steps are:

[0031] 1) Take 2.00 g of graphite powder with a size of 800 mesh and add it to 35 mL of concentrated sulfuric acid, stir evenly for 2 h to obtain a mixed solution; slowly add 6 g of KMnO 4 , keep the temperature of the mixture below 20°C during the addition process; then place it in a water bath at 35°C for 4 hours, slowly add 90 mL of deionized water to dilute, and stir thoroughly for 1 hour to obtain a dark brown suspension; Then gradually add 30wt% H 2 o 2 , until the color turned bright yellow, and filtered while hot; then washed with 5wt% HCl solution to remove the manganese ions and make the solution neutral, and then dispersed by ultrasonic waves, freeze-dried for 48 h, that is Solid graphene oxide can be obtained;

[0032] 2) Weigh 2.00 g of dried mulberry leaves, cut them into pieces and put them into a beaker filled with 200 mL of distilled water, then place them ...

Embodiment 3

[0035] A method for preparing graphene with leaf extract as reducing agent, the specific steps are:

[0036] 1) Take 2.00 g of graphite powder with a size of 800 mesh and add it to 35 mL of concentrated sulfuric acid, stir evenly for 2 h to obtain a mixed solution; slowly add 6 g of KMnO 4 , keep the temperature of the mixture below 20°C during the addition process; then place it in a water bath at 35°C for 4 hours, slowly add 90 mL of deionized water to dilute, and stir thoroughly for 1 hour to obtain a dark brown suspension; Then gradually add 30wt% H 2 o 2 , until the color turned bright yellow, and filtered while hot; then washed with 5wt% HCl solution to remove the manganese ions and make the solution neutral, and then dispersed by ultrasonic waves, freeze-dried for 48 h, that is Solid graphene oxide can be obtained;

[0037]2) Weigh 3.00 g of dried tea tree leaves, cut them into pieces and put them into a beaker filled with 200 mL of distilled water, then put them int...

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

No PUM Login to View More

Abstract

The invention discloses a method for preparing graphene with a leaf extraction solution serving as a reductant. The method comprises the steps that firstly, graphene oxide is prepared by an improved Hummers method, that is, graphite oxide is prepared by taking graphite powder, concentrated sulfuric acid, potassium permanganate, hydrogen peroxide and the like as oxidizing agents, and ultrasonic dispersion and freeze-drying are conducted to obtain the graphene oxide; and secondly, the leaf extracting solution is adopted as the reductant and stabilizer, and the graphene is prepared by reducing the graphene oxide. The method has the advantages of being low in cost, good in effect, convenient to use, environmentally friendly and the like.

Description

technical field [0001] The invention belongs to the field of graphene preparation, and in particular relates to a method for preparing graphene using leaf extract as a reducing agent. Background technique [0002] Graphene is a carbon atom with sp 2 Two-dimensional nanomaterials formed by hybridization have become a popular research object in the current nanoscience and technology disciplines. Due to their unique mechanical, electrical, thermal and optical properties, they are widely used in nanoelectronics, sensors, supercapacitors and composite materials. Therefore, it is particularly important to find a method that can synthesize high-quality single-layer graphene in a large area. The existing preparation methods are: mechanical stripping method, chemical vapor deposition method, epitaxial growth method and redox method. Among them, the redox method has the advantages of low cost and easy operation, and is currently the most potential method for industrial production o...

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): C01B32/184
CPCC01B2204/22C01P2004/01C01P2004/04
Inventor 陈祖亮金晓英李成杨林加奖
Owner FUJIAN NORMAL 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