Preparation of high-quality graphene with plant film layer and preparation method thereof

A high-quality, graphene technology, applied in the field of graphene, to achieve the effect of low cost, large industrial promotion value, and improved flatness

Active Publication Date: 2018-08-28
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no reports on the relevant patents on the synthesis of graphene materials by plant membranes

Method used

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  • Preparation of high-quality graphene with plant film layer and preparation method thereof
  • Preparation of high-quality graphene with plant film layer and preparation method thereof
  • Preparation of high-quality graphene with plant film layer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1: Soak 5 g of Magnolia petals in 100 mL of distilled water for 10 minutes to wash away the floating dust, make a mixture of ethanol and ultrapure water at a volume ratio of 1:3, and use hydrochloric acid to adjust the pH to 4. Use this mixture Soak Magnolia petals in 100 mL solution for 48 h;

[0040] Step 2: Take out the soaked Magnolia petals, put them in 100 mL of 10% glucose solution, soak them for 24 h, and then put them in an ultrasonic microwave synthesizer, with microwave frequency of 2450 MHz and ultrasonic frequency of 18 KHz React for 20 minutes;

[0041] Step 3: Use a 50 mL centrifuge tube at 8000 r / min to centrifuge the treated Magnolia petals from the glucose solution, and wash them several times with ultrapure water, spread them flat on a petri dish, and set them at 40 ℃ oven, dry for 10 hours;

[0042] Step 4: Put the dried plant film into a corundum porcelain boat, place it in a tube furnace, protect it with nitrogen, raise the temperature to 70...

Embodiment 2

[0047] Step 1: Soak 5 g of cherry blossom petals in 100 mL of distilled water for 10 minutes to wash off the floating dust, make a mixture of ethanol and ultrapure water at a volume ratio of 1:3, and use hydrochloric acid to adjust the pH to 4. Use this mixture 100 mL soaked cherry blossom petals for 36 h;

[0048] Step 2: Take out the soaked cherry blossom petals, put them in 120 mL of 10% glucose solution, soak them for 24 h, then put them in an ultrasonic microwave synthesizer, react with 2450 MHz microwave frequency and 15 KHz ultrasonic frequency 20min;

[0049] Step 3: Use a 50 mL centrifuge tube at 8000 r / min to centrifuge the treated cherry blossom petals from the glucose solution, and wash them several times with ultrapure water. Dry in an oven for 8 hours;

[0050] Step 4: Put the dried plant film into a corundum porcelain boat, place it in a tube furnace, protect it with nitrogen, raise the temperature to 700 °C at a rate of 2 °C / min, and keep it warm for 2 hours;...

Embodiment 3

[0053] Step 1: Soak 8 g of corn stalks in 100 mL of distilled water for 10 minutes to wash away the floating dust, make a mixture of ethanol and ultrapure water at a volume ratio of 1:3, and use hydrochloric acid to adjust the pH to 2. Use this mixture 180 mL of soaked straw for 48 h;

[0054] Step 2: Take out the soaked straw, put it in 160 mL of 3% glucose solution, soak it for 12 hours, then place it in an ultrasonic microwave synthesizer, and react it with microwave frequency of 2450 MHz and ultrasonic frequency of 25 KHz for 60 min ;

[0055] Step 3: Use a 50 mL centrifuge tube at 8000 r / min to centrifuge the treated straw out of the glucose solution and wash it several times with ultrapure water. In the oven, dry for 24 hours;

[0056] Step 4: Put the dried plant film into a corundum porcelain boat, place it in a tube furnace, protect it with nitrogen, raise the temperature to 900 °C at a rate of 2 °C / min, and keep it warm for 4 hours;

[0057] Step 5: After the calci...

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Abstract

The invention provides high-quality graphene prepared from a plant membrane layer and a preparation method thereof. The preparation method comprises the following steps: firstly, selecting a plant tissue containing the plant membrane layer, washing the plant tissue cleanly, and soaking the washed plant tissue in an ethanol and ultrapure water acidic mixed solution; then dipping the plant tissue in a glucose solution, followed by placing the plant tissue in an ultrasonic microwave synthesis instrument, and carrying out microwave ultrasonic treatment; then carrying out centrifugal separation, and washing and drying; and finally, placing the dried plant tissue in a tube furnace, calcining, naturally cooling to room temperature, and thus obtaining the high-quality graphene. The nanoscale self-assembly ability of biological macromolecules is utilized, the plant membrane layer is used as a carbon source and a template, glucose is used as a net supplementing agent, the relatively simple chemical process is used for preparing the graphene material, the required chemical raw materials have fewer types and no toxicity, the reaction has no need of complex equipment, the cost is relatively low, and the method has no pollution to the environment, has good experimental repeatability and has relatively great industrial promotion value.

Description

technical field [0001] The invention belongs to the technical field of graphene, and relates to a method for preparing high-quality graphene from a plant film layer and a preparation method thereof, in particular to a preparation method for synthesizing a large graphene layer from polysaccharide biomacromolecules contained in a plant film layer, and more Specifically, it is a preparation method for synthesizing high-quality graphene with different types of plant membranes as templates. Background technique [0002] In recent years, graphene has attracted great attention from the scientific community. Its excellent thermal conductivity, electrical conductivity, optical and mechanical properties make it have broad application prospects in the fields of electronics, energy storage and conversion, biological detection and sensing. The ideal graphene is made of sp 2 A monolayer structure in which the hexagonal lattice formed by hybridized carbon atoms spreads in two dimensions t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184
CPCC01B2204/04C01P2002/82C01P2004/04
Inventor 刘成宝孙慧钱君超曹云岳陈志刚陈丰吴正颖徐兴毛栋星
Owner SUZHOU UNIV OF SCI & TECH
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