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Preparation method of graphene

A graphene and lignin technology, applied in the field of carbon material production technology, can solve the problems of large uncertainty, high cost, low efficiency, etc., and achieve the effects of good electrochemical performance, good reference significance, and high academic value.

Active Publication Date: 2020-04-28
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The controllability of the micromechanical exfoliation method is poor, the size of the obtained graphene is small, and there is a large uncertainty, while the efficiency is low, the cost is high, and it is not suitable for large-scale production

Method used

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  • Preparation method of graphene
  • Preparation method of graphene
  • Preparation method of graphene

Examples

Experimental program
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Effect test

Embodiment 1

[0028] In Example 1, at room temperature, 6g of lignin, 2.5g of iron nitrate nonahydrate and 6ml of tetrahydrofuran were added to 100ml of deionized water, heated in a water bath at 80°C for 8 hours, and dried in a blast drying oven until All converted to precursors. Transfer the obtained precursor to a porcelain sample boat and put it in a solid tube furnace, raise it from room temperature at 5℃ / min to 180° and keep it for 1 hour, then continue to heat it up to 900° and keep it for 3 hours, then 5℃ / min is reduced to room temperature, and nitrogen protection is introduced at a constant speed during the calcination process at a rate of 60ml / min. The calcined sample was taken out and rinsed with 1mol / L dilute hydrochloric acid until no more bubbles were generated and the supernatant was clear. After standing for 24 hours, change the hydrochloric acid and heat it in a 80° water bath for 3 hours, and ultrasonicate for 2 hours after cooling. The solid was obtained by centrifugatio...

Embodiment 2

[0029] In Example 2, at room temperature, 6g of lignin, 2.5g of iron nitrate nonahydrate and 6ml of tetrahydrofuran were added to 100ml of deionized water, heated in a water bath at 80°C for 8 hours, and dried in a blast drying oven until All converted to precursors. Transfer the obtained precursor to a porcelain sample boat and put it in a solid tube furnace, raise it from room temperature at 5℃ / min to 180° and keep it for 1 hour, then continue to heat it up to 800° and keep it for 3 hours, then 5℃ / min is reduced to room temperature, and nitrogen protection is introduced at a constant speed during the calcination process at a rate of 60ml / min. The calcined sample was taken out and rinsed with 1mol / L dilute hydrochloric acid until no more bubbles were generated and the supernatant was clear. After standing for 24 hours, change the hydrochloric acid and heat it in a 80° water bath for 3 hours, and ultrasonicate for 2 hours after cooling. The solid was obtained by centrifugatio...

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Abstract

The invention discloses a preparation method of graphene. The lignin-like substance is used as a raw material, tetrahydrofuran is used as a modifier, ferric nitrate nonahydrate is used as a catalyst,lignin is subjected to water bath treatment by the modifier and the ferric nitrate nonahydrate and then calcined to obtain graphene; the lignin-like substance is straw fermentation biogas residue or straw acid hydrolysis residue, the preparation method of the graphene disclosed by the invention has the advantages that the process is simple, the conversion from low-added-value biomass waste to high-added-value product graphene is realized, and the important significance is realized.

Description

Technical field [0001] The present invention relates to the technical field of carbon material production technology, in particular to a preparation method of graphene. Background technique [0002] Energy is the cornerstone of human survival and development. At present, in the global energy system, the main energy humans rely on is still fossil energy (coal, petroleum, etc.). However, the large-scale use of these fossil energy sources will lead to the production of large quantities of greenhouse gases and hard-to-degrade polymer waste, which will have a difficult-to-recover impact on the environment. At the same time, the reserves of these energy sources on the earth are limited. From a long-term perspective, mankind is bound to face an energy crisis. Therefore, the task of seeking renewable energy that can replace petrochemical energy is urgent. Among all kinds of renewable energy, biomass is a unique and only renewable carbon source. It has the characteristics of renewable, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184
CPCC01B32/184
Inventor 赵岩文敏月李宗儒何春虎刘长浪刘银
Owner ANHUI UNIV OF SCI & TECH
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