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Biomass porous carbon material based on watermelon peel and preparation method and application of biomass porous carbon material

A biomass and porous carbon technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of complex preparation process and high preparation cost of supercapacitor electrode materials, and achieve excellent electrochemical performance, high specific surface area, The effect of expanding the application field

Inactive Publication Date: 2017-07-21
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a biomass porous carbon material based on watermelon rind and its preparation method and application, to solve the problems of complex preparation process and high preparation cost of supercapacitor electrode materials

Method used

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  • Biomass porous carbon material based on watermelon peel and preparation method and application of biomass porous carbon material
  • Biomass porous carbon material based on watermelon peel and preparation method and application of biomass porous carbon material
  • Biomass porous carbon material based on watermelon peel and preparation method and application of biomass porous carbon material

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preparation example Construction

[0026] (1) Preparation of the precursor: Mix the watermelon rind powder that has been dried and pulverized after removing the outer hard peel with the activator, add deionized water, stir magnetically for 5-6 hours in the solution state, and then dissolve the solution at 50- Dry to constant weight at 60 °C to obtain the precursor;

[0027] The mass ratio of above-mentioned activator and watermelon peel powder is 0.05: 1~20: 1, is preferably 1: 1~9: 1;

[0028] The activator is one or more of zinc chloride, phosphoric acid, sodium carbonate, sodium bicarbonate, sodium hydroxide or potassium hydroxide;

[0029] (2) Preparation of biomass porous carbon material: put the above precursor into a graphite crucible, place it in a resistance furnace, and heat it at 3-10 °C min -1 The heating rate is anaerobic heating to 400~1100 ℃ (preferably 600~800 ℃), and then pyrolyzed at this temperature for 1-3h and then lowered to room temperature to obtain a solid powder. °C to a constant wei...

Embodiment 1

[0035] The preparation method of the biomass porous carbon material based on watermelon rind is as follows:

[0036] (1) Take 0.4 g of potassium hydroxide and 0.4 g of dried and pulverized watermelon rind powder (mass ratio: 1:1), put them into a beaker, add 20 mL of deionized water, stir for 5 h, pour Put it into an evaporating dish, dry it in an oven at 60 °C to constant weight, obtain a light yellow solid mixture, and then grind it to obtain a precursor;

[0037] (2) Put the above precursors into a graphite crucible, place in a resistance furnace, and heat at a rate of 5 °C min -1 Anaerobically heated to 700 °C, then pyrolyzed at this temperature for 1 h, and then cooled to room temperature with the furnace, the obtained black solid powder was subjected to 1 molL -1 Washed with hydrochloric acid and dried to constant weight at 60 °C to obtain a biomass porous carbon material, its scanning electron microscope picture is as follows: figure 1 As shown, it can be seen that th...

Embodiment 2

[0040] The preparation method of the biomass porous carbon material based on watermelon rind is as follows:

[0041] (1) Take 0.8 g of potassium hydroxide and 0.4 g of dried and pulverized watermelon rind powder (mass ratio: 2:1), put them into a beaker, add 20 mL of deionized water, and perform magnetic stirring for 5 h , poured into an evaporating dish, and dried in an oven at 60 °C to constant weight to obtain a light yellow solid mixture, which was then ground to obtain a precursor;

[0042] (2) Put the above precursors into a graphite crucible, place in a resistance furnace, and heat at a rate of 5 °C min -1Anaerobically heated to 700 °C, then pyrolyzed at this temperature for 1 h, and then cooled to room temperature with the furnace, the obtained black solid powder was subjected to 1 molL -1 Washed with hydrochloric acid and dried to constant weight at 60 °C to obtain a biomass porous carbon material, its SEM picture is as follows figure 2 As shown, it can be seen tha...

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Abstract

The invention discloses a biomass porous carbon material and a preparation method and application thereof, and belongs to the technical field of preparation of porous carbon materials. The method comprises the following steps: drying watermelon peel without outer hard peel, and then pulverizing the dried watermelon peel; mixing the obtained watermelon peel powder and an activating agent in a solution to obtain a precursor; and finally, carrying out high-temperature anaerobic carbonization process to obtain the biomass porous carbon material. The prepared biomass porous carbon material can be used for electrode materials of supercapacitors. The preparation method is simple and feasible; the obtained biomass porous carbon material is fluffy in structure, low in cost and excellent in performance, and is suitable for large-scale commercial production; and the method provides a new way for preparation of biomass porous carbon materials.

Description

technical field [0001] The invention belongs to the technical field of preparation of porous carbon materials, and in particular relates to a preparation method and application of biomass porous carbon materials based on watermelon rind. Background technique [0002] Supercapacitors have attracted extensive attention for their outstanding energy conversion and storage characteristics. Nowadays, a variety of carbon materials, including activated carbon, ordered mesoporous carbon, carbon aerogel, and graphene-based carbon materials, are widely used as electrode materials for supercapacitors due to their structural controllability. Among them, activated carbon has attracted the research interest of many scholars because of its high specific surface area, developed pore structure, excellent electrical conductivity and stable electrochemical performance, thus becoming an ideal electrode material for supercapacitors. In the traditional preparation of activated carbon, the raw mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/342C01B32/348H01G11/34
CPCY02E60/13H01G11/34C01P2004/03C01P2006/40
Inventor 吕秋丰林晓强陈明慧勒艳巧
Owner FUZHOU UNIV
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