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Preparation method and application of grapefruit pulp peel based porous carbon material

A technology of porous carbon materials and pomelo pulp, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problem of low specific capacitance of porous carbon materials, achieve good electrochemical performance and stability, realize effective utilization, and process simple effect

Inactive Publication Date: 2018-09-28
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The synthesis process of the invention is simple to operate, easy to operate, and the raw materials are cheap and easy to obtain, which realizes the effective utilization of resources; but the specific capacitance of the prepared porous carbon material is low, at 0.1 A g -1 Under the current density, the specific capacitance is only 258~273 F g -1

Method used

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  • Preparation method and application of grapefruit pulp peel based porous carbon material
  • Preparation method and application of grapefruit pulp peel based porous carbon material
  • Preparation method and application of grapefruit pulp peel based porous carbon material

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Embodiment

[0031] Step 1) Low-temperature carbonization of pomelo pulp skin, peel off the white thin skin wrapped on pomelo pulp, wash, cut into strips, dry in a blast drying oven at 85°C, and then dry the dried pomelo The pulp skin was calcined in a muffle furnace, the reaction temperature was 300°C, the reaction time was 2h, and the heating rate was 3°C / min to generate a carbon precursor;

[0032] Step 2) Activation of pomelo peel-based porous carbon materials. Soak 1g of carbon precursor and 2g of potassium hydroxide in 30ml of deionized water at the same time, stir magnetically for 5h at room temperature, and then dry in a blast drying oven. The dried sample was put into a tube furnace and calcined under the protection of nitrogen. The reaction temperature was 700°C, the reaction time was 2h, and the heating rate was 3°C / min to obtain a pomelo peel-based porous carbon material;

[0033] Step 3) Post-processing of the pomelo peel-based porous carbon material, soaking the above-mention...

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Abstract

The invention discloses a porous carbon material prepared from grapefruit pulp peel, namely by using grapefruit pulp peel to prepare carbon precursor, using alkaline inorganic matter for treatment andcalcining. Specific surface area of the porous carbon material ranges from 972m2 g-1 to 1598m2 g-1, and average pore diameter distribution ranges from 1.76nm to 1.89nm. The preparation method includes following steps: 1), carbonizing grapefruit pulp peel at low temperature; 2), activating the grapefruit pulp peel based porous carbon material; 3), post-treating the grapefruit pulp peel based porous carbon material. When the porous carbon material is applied as a supercapacitor electrode material, Specific capacitance value ranges from 117F g-1 to 315F g-1 when current density is 0.5A g-1. Thegrapefruit pulp peel is used as a carbon source, so that application field of biological materials is expanded; the porous carbon material has extensive application prospect in the field of porous materials and supercapacitors.

Description

technical field [0001] The invention relates to the field of preparation of biomass carbon materials, in particular to a preparation method and application of pomelo peel-based porous carbon materials. Background technique [0002] Energy is the main driving force for the development of human society. Throughout the history of human development, every innovation in energy technology has caused major changes in social productivity and production relations, thus promoting the development of history. However, due to the rapid development of industrialization and the unrestrained exploitation of fossil fuels such as coal, oil, and natural gas, a series of problems such as resource shortage and environmental pollution have been caused, and the development and use of renewable energy have received increasing attention. [0003] Porous carbon materials have become one of the most potential electrode materials for double-electrode capacitors due to their large specific surface area...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/348H01G11/44
CPCC01B32/324C01B32/348C01P2002/80C01P2006/12C01P2006/17C01P2006/40H01G11/44Y02E60/13
Inventor 徐芬徐超超孙立贤曹黎志印世璐程日光张焕芝
Owner GUILIN UNIV OF ELECTRONIC TECH
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