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Chitosan activated carbon and preparation method thereof

A chitosan and activated carbon technology, applied in the field of chitosan activated carbon, can solve the problems of animal biomass carbon conversion, which have not been reported, and achieve the effects of easy implementation, short carbonization time, and complex equipment.

Inactive Publication Date: 2010-07-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current microwave carbonization method mainly focuses on how to convert plant biomass into biochar, while the carbon conversion of animal biomass (such as chitosan) has not been reported.

Method used

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  • Chitosan activated carbon and preparation method thereof
  • Chitosan activated carbon and preparation method thereof
  • Chitosan activated carbon and preparation method thereof

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Experimental program
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specific Embodiment approach 1

[0014] Specific embodiment 1: In this embodiment, chitosan-based activated carbon is prepared from chitosan as a raw material, activated by a metal ion solution, and then subjected to microwave carbonization, pickling, water washing, centrifugation and drying. The appearance is Black, porous structure, amorphous pores, pore diameter 2nm~5μm, pore volume 0.20~45.00cm 3 / g, the specific surface area is 500~996m 2 / g.

[0015] The chitosan activated carbon composition described in the present embodiment is made up of C, H, N and O, and the C element mass percentage content is 78%~94% in the described chitosan activated carbon mass percentage content, and the H element mass percentage content is 0.14%~1.52%, the mass percentage content of N element is 0.98%~8.22%, and the balance is O.

specific Embodiment approach 2

[0016] Specific embodiment two: the preparation method of chitosan activated carbon in the present embodiment is carried out according to the following steps: one, chitosan powder is dissolved in the acetic acid solution that concentration is 0.01~0.05g / mL, prepare chitosan Sugar concentration is 0.02 ~ 0.06g / mL chitosan acid solution; 2, the chitosan acid solution prepared in step 1 is poured into a concentration of 0.03 ~ 0.10g / mL NaOH solution to precipitate chitosan hydrogel, and then use Wash the chitosan hydrogel with ionic water until the pH is 7, then soak the chitosan hydrogel in a metal ion solution with a concentration of 0.02-0.30 g / mL, and activate it at room temperature for 0.5-48 hours, wherein the metal ion solution The metal ions in it can chelate with chitosan; 3. Then carbonize for 6-15min at a microwave power of 500-800W, and then pickle, wash, centrifuge and dry to obtain chitosan Activated carbon.

specific Embodiment approach 3

[0018] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the metal ion in the metal ion solution described in step two is Cu 2+ , Zn 2+ 、Ni 2+ , Fe 2+ , Fe 3+ or Co 2+. Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention provides chitosan activated carbon and a preparation method thereof, which belong to the field of biomass activated carbon. This invention enriches preparation methods of biomass activated carbon. The chitosan activated carbon is formed by taking chitosan as raw material, performing activation treatment through metal ion solution and then performing microwave carbonization. The method activates chitosan through metal ions and then utilizes microwave carbonization to quickly carbonize the activated chitosan so as to obtain the chitosan activated carbon. The preparation method solves the problem that the conventional thermal-decomposition carbonization method is long in time consumed for preparing chitosan carbon materials and incapable of directly subjecting chitosan to microwave carbonization, and synchronously completes the carbonization and activation of chitosan activated carbon materials. Meanwhile, the chitosan activated carbon prepared by the method has the advantages of short needed time, simple preparation method and readily available equipment.

Description

technical field [0001] The invention belongs to the field of biomass activated carbon, in particular to a chitosan activated carbon material and a method for quickly carbonizing chitosan treated with an activator into the chitosan activated carbon. Background technique [0002] Due to the broad application prospects of carbon materials in the fields of catalyst supports, electrode materials and adsorbents, the synthesis of carbon materials is a current research hotspot. The raw materials of synthetic carbon materials mainly include fossil fuels (such as coal, petroleum and their derivatives) and plant biomass (such as cellulose: including wood, stems and leaves, straw and bamboo, or starch: including corn and rice) . Biomass provides abundant, cheap and sustainable resources for synthetic carbon materials due to its sustainable regeneration, green and pollution-free characteristics. Biomass carbon material is a kind of carbon material prepared from biological organic matte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12
Inventor 李保强贺全志罗阳王永亮周玉
Owner HARBIN INST OF TECH
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