Chestnut shell-based biomass carbon material as well as preparation method and application thereof

A biomass carbon and chestnut shell technology, applied in the field of carbon materials, can solve the problems of direct incineration, for livestock use or as landfill, waste of biomass resources, environmental pollution, etc., to achieve good application prospects, improve removal rate, environmental friendly effect

Active Publication Date: 2021-02-09
承德石油高等专科学校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] my country is a large agricultural country, which can produce a large amount of biomass resources such as straw and fruit shells every year. However, due to the limitation of preservation and transformation technology,...

Method used

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  • Chestnut shell-based biomass carbon material as well as preparation method and application thereof
  • Chestnut shell-based biomass carbon material as well as preparation method and application thereof

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preparation example Construction

[0024]The present invention first provides a method for preparing a chestnut shell-based biomass carbon material, which includes:

[0025]Step 1: The chestnut shell powder and organic acid are reacted by hydrothermal method, which is specifically preferably:

[0026]Weigh the chestnut shell powder, add organic acid, place it in a polytetrafluoroethylene lining, and react in an oven. The reaction temperature is preferably 180-200°C, and the time is preferably 6-8h to obtain a hydrothermal carbon material; The organic acid is preferably selected from one or more of citric acid, salicylic acid and tartaric acid, and the concentration is preferably 0.1 mol / L to 0.3 mol / L; the mass of the chestnut shell powder (g): organic acid The volume mL is preferably (5-8): 70; prior to use of the chestnut shell powder, the waste chestnut shells are preferably washed 4-6 times with distilled water, crushed, and dried in a constant temperature drying oven.

[0027]Step 2: Place the hydrothermal carbon materia...

Embodiment 1

[0036]1) Wash the discarded chestnut shells with distilled water for 4-6 times, crush them, dry them in a constant temperature drying oven at 100°C, and store them for later use.

[0037]2) Weigh 6g of chestnut shell powder, add 70mL, 0.1mol / L salicylic acid solution, place it in a polytetrafluoroethylene liner, and react in an oven at 180°C for 6 hours to obtain a hydrothermal carbon material;

[0038]3) Place the material obtained in step 2) in a 3mol / L sodium carbonate solution, fully stir and then stand still, filter and freeze-dry for 36 hours to obtain a dried carbon material;

[0039]4) The freeze-dried sample is calcined in an inert atmosphere at a heating rate of 5°C / min to 350°C for 1 hour, then at a heating rate of 5°C / min to 800°C, and constant heat treatment for 2 hours to obtain the pre-product.

[0040]5) Use 1mol / L HNO for the pre-product3Soak, and then wash with water to neutrality to obtain chestnut shell-based biomass carbon material.

[0041]The obtained chestnut shell-based bi...

Embodiment 2

[0043]1) Wash the discarded chestnut shells with distilled water for 4-6 times, crush them, dry them in a constant temperature drying oven at 100°C, and store them for later use.

[0044]2) Weigh 7.5g of chestnut shell powder, add 70mL, 0.1mol / L citric acid solution, place it in a polytetrafluoroethylene lining, and react in an oven at 200°C for 6 hours to obtain a hydrothermal carbon material;

[0045]3) Place the material obtained in step 2) in a 4mol / L potassium hydroxide solution, fully stir and then stand still, filter and freeze-dry for 48 hours to obtain a dried carbon material;

[0046]4) The freeze-dried sample is calcined in an inert atmosphere at a heating rate of 5°C / min to 350°C for 1 hour, and then at a heating rate of 5°C / min to 700°C, and constant heat treatment for 2 hours to obtain the pre-product.

[0047]5) Soak the pre-product with 1 mol / L HCl, and then wash it with water to neutrality to obtain a chestnut shell-based biomass carbon material.

[0048]The obtained SEM image of ...

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Abstract

The invention provides a chestnut shell-based biomass carbon material as well as a preparation method and application thereof, and belongs to the technical field of carbon materials. The method comprises the following steps: firstly, reacting chestnut shell powder with an organic acid by adopting a hydrothermal method to obtain a hydrothermal carbon material; then putting the hydrothermal carbon material into an alkaline solution, conducting full stirring, standing, filtering and freeze-drying to obtain a dried carbon material; reacting the carbon material in an inert atmosphere to obtain a pre-product; and finally, soaking the pre-product with an inorganic strong acid, and conducting washing with water until the pre-product is neutral to obtain the chestnut shell-based biomass carbon material. The chestnut shell-based biomass carbon material has good pore structure and capacitive performance, is applied to an electrode material of a capacitive deionization technology to remove toxic heavy metals, and can effectively improve the removal rate.

Description

Technical field[0001]The invention belongs to the technical field of carbon materials, and specifically relates to a chestnut shell-based biomass carbon material and a preparation method and application thereof.Background technique[0002]In recent years, with the development of economy and society, especially the rapid development of mining, metallurgy, foundry and chemical industries, a large amount of heavy metal wastewater has been discharged. On the one hand, these heavy metal wastewater entering the water environment will cause water pollution and ecological environmental damage. ; On the other hand, my country is a country with relatively short fresh water resources, and the per capita water resources are only 1 / 4 of the world level. These large amounts of waste water are a waste of resources. Capacitive deionization technology has the advantages of low energy consumption, in-situ regeneration, and no secondary pollution to the environment, and has great application potential a...

Claims

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Application Information

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IPC IPC(8): C01B32/324C01B32/348C02F1/469
CPCC01B32/324C01B32/348C02F1/4691
Inventor 张晓飞吴效楠牛桂玲高洪成侯士法
Owner 承德石油高等专科学校
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