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Cubic carbon material from hemicellulose and preparation method thereof

A technology of hemicellulose and cubic shape, which is applied in the field of cubic carbon materials and its preparation, can solve the problems of insufficient biomass carbon material precursor materials, poor material appearance, complicated preparation process, etc., and achieve low price and low cost. The effect of low cost and simple preparation process

Inactive Publication Date: 2020-04-28
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the process of preparing biomass carbon materials using the above methods often has problems such as insufficient precursor materials, poor material morphology, and complicated preparation processes, which limit its further application.

Method used

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  • Cubic carbon material from hemicellulose and preparation method thereof
  • Cubic carbon material from hemicellulose and preparation method thereof

Examples

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Embodiment 1

[0027] A preparation method of a cubic carbon material from hemicellulose, specifically comprising the following steps:

[0028] 1) Cut pomelo peel into small pieces, wash, dry and grind into powder.

[0029] 2) Dissolve 6 g of pomelo peel powder and KOH solution at a mass ratio of 1:4, stir and filter the obtained supernatant to make it neutral, mix ethanol with the obtained supernatant and wash by centrifugation to obtain a mixture.

[0030] 3) The mixture was vacuum-dried in a vacuum drying oven, and vacuum-dried at 80° C. for 6 hours to obtain a hemicellulose precursor.

[0031] 4) Combine hemicellulose precursor with activator H 3 PO 4 After mixing, calcining at a high temperature of 600° C. for 2 hours to obtain a semi-fibrous cubic carbon material. From figure 1 It can be seen from the SEM image that the prepared carbon material has a relatively regular morphology, generally a cubic structure. It shows that this method is easy to operate and low in cost, and it is ...

Embodiment 2

[0033] A preparation method of a cubic carbon material from hemicellulose, specifically comprising the following steps:

[0034] 1) Cut pomelo peel into small pieces, wash, dry and grind into powder.

[0035] 2) Dissolve 8 g of pomelo peel powder and KOH solution at a mass ratio of 1:4, stir and filter the obtained supernatant to make it neutral, mix ethanol with the obtained supernatant and wash by centrifugation to obtain a mixture.

[0036] 3) The mixture was vacuum-dried in a vacuum drying oven, and vacuum-dried at 70° C. for 8 hours to obtain a hemicellulose precursor.

[0037] 4) Combine hemicellulose precursor with activator H 3 PO 4 After mixing, calcining at a high temperature of 800° C. for 3 hours to obtain a semi-fibrous cubic carbon material. From figure 2 It can be seen from the SEM image that the prepared carbon material has a relatively regular morphology, generally a cubic structure. However, due to the high calcination temperature, the structural surfac...

Embodiment 3

[0039] A preparation method of a cubic carbon material from hemicellulose, specifically comprising the following steps:

[0040] 1) Cut pomelo peel into small pieces, wash, dry and grind into powder.

[0041] 2) Dissolve 10 g of pomelo peel powder and KOH solution at a mass ratio of 1:4, stir and filter the obtained supernatant to make it neutral, mix ethanol with the obtained supernatant and wash by centrifugation to obtain a mixture.

[0042] 3) The mixture was vacuum-dried in a vacuum drying oven, and vacuum-dried at 70° C. for 8 hours to obtain a hemicellulose precursor.

[0043] 4) Combine hemicellulose precursor with activator H 3 PO 4 After mixing, calcining at a high temperature of 600° C. for 2 hours to obtain a semi-fibrous cubic carbon material.

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Abstract

The invention relates to a cubic carbon material from hemicellulose and a preparation method thereof, wherein the preparation method comprises the following steps: 1) cutting shaddock peel into pieces, washing and drying the shaddock peel pieces, and grinding the shaddock peel pieces into powder to obtain shaddock peel powder; 2) adding the shaddock peel powder into an alkaline solution, uniformlystirring and filtering the mixture, and collecting the supernatant; 3) adjusting the supernatant to be neutral, mixing the supernatant with ethanol, performing centrifugal washing, and drying the liquid to obtain a hemicellulose precursor; and 4) mixing the hemicellulose precursor with an activating agent, and calcining the precursor at high temperature to obtain the cubic carbon material. Compared with the prior art, the preparation process is simple, the carbon material is directly synthesized through a one-step method, energy conservation is facilitated, the prepared biomass-based carbon electrode material is of a regular cubic structure, subsequent modification and other operations are facilitated, the raw materials are extracted from biomass waste shaddock peel, the cost is low, andthe application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, and relates to a cubic carbon material derived from hemicellulose and a preparation method thereof. Background technique [0002] Biomass resources are various, widely distributed, extremely rich in reserves and low in price. They are very important renewable resources. The use and development of biomass resources can achieve the purpose of sustainable recycling. At the same time, biomass is the carrier of naturally occurring renewable carbon elements, and there is great room for development to convert it into new functional carbon materials for utilization. [0003] Cellulose is a lightweight, biocompatible and flexible biopolymer material in nature, and has been widely used in flexible supercapacitors, biosensors, and electromagnetic shielding. In the field of flexible supercapacitors, the polyhydroxy structure of cellulose-based materials is a good medium for electrolyte ion conducti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/342H01G11/44H01G11/34
CPCC01B32/324C01B32/342H01G11/34H01G11/44Y02E60/13
Inventor 蔺华林李梦琰王叶函刘为民李晓斌韩生
Owner SHANGHAI INST OF TECH
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