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Preparation method of chitosan oligosaccharide-based in-situ N-doped ordered mesoporous carbon with uniform and adjustable pore diameter

A technology of mesoporous carbon and chitosan oligosaccharide, which is applied in the field of preparation of ordered mesoporous carbon, can solve the problems of pore structure damage, pore size control hindrance, complicated steps, etc., and achieve uniform and controllable pore size, novel process method and low production cost. low effect

Active Publication Date: 2021-10-01
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the following problems exist in the preparation of ordered mesoporous carbon materials by pore-enlarging agents: 1) pore-enlarging agents will damage the pore structure; 2) the selection of pore-enlarging agents has certain restrictions (mainly B elements); 3) the step Complicated and high cost, resulting in pore size control is still hindered; 4) The carbon source selection stays on phenolic resin and some small molecules of sucrose, xylose, fructose and other carbon sources, the prepared ordered mesoporous carbon materials have dispersibility and Poor wettability and other shortcomings, thus limiting the application in the biomedical field
Utilize the rich nitrogen and oxygen groups of chitosan oligosaccharides to in-situ nitrogen-doped the prepared materials, improve the hydrophilic properties of the ordered mesoporous carbon surface, and solve the poor wettability and dispersibility of the current mesoporous carbon, which must be followed by subsequent processing pore size regulation and other issues

Method used

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  • Preparation method of chitosan oligosaccharide-based in-situ N-doped ordered mesoporous carbon with uniform and adjustable pore diameter
  • Preparation method of chitosan oligosaccharide-based in-situ N-doped ordered mesoporous carbon with uniform and adjustable pore diameter
  • Preparation method of chitosan oligosaccharide-based in-situ N-doped ordered mesoporous carbon with uniform and adjustable pore diameter

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Effect test

Embodiment 1

[0061] Embodiment 1: A kind of preparation method of uniform adjustable chitosan oligosaccharide base in-situ N-doped ordered mesoporous carbon with pore size, specifically comprises the following steps:

[0062] 1) Preparation of SBA-15 ordered mesoporous silica template: Dissolve P123 in HCl solution, and stir evenly in a water bath, slowly add tetraethyl orthosilicate and continue stirring at this temperature, then Pour the mixture into a hydrothermal tank for hydrothermal reaction, cool it, take it out, wash it, then dry it, and then put the product into a tube furnace to heat up and calcinate to obtain a surfactant-free SBA-15 ordered mesoporous silica template ; wherein the concentration of the HCl solution is 5.5wt%; the temperature of the water bath is 40°C; the mass ratio of P123 to ethyl orthosilicate is 1:2.1, and the stirring time after adding ethyl orthosilicate is 20h; The temperature of the hydrothermal reaction is 100°C, and the time is 12h; the final temperatu...

Embodiment 2

[0067] Embodiment 2: the preparation method of N-doped ordered mesoporous carbon of a kind of aperture uniform adjustable chitosan oligosaccharide base in situ, specifically comprises the following steps:

[0068] 1) Preparation of SBA-15 ordered mesoporous silica template: Dissolve P123 in HCl solution, and stir evenly in a water bath, slowly add tetraethyl orthosilicate and continue stirring at this temperature, then Pour the mixture into a hydrothermal tank for hydrothermal reaction, cool it, take it out, wash it, then dry it, and then put the product into a tube furnace to heat up and calcinate to obtain a surfactant-free SBA-15 ordered mesoporous silica template ; wherein the concentration of the HCl solution is 5wt%%; the temperature of the water bath is 30°C; the mass ratio of P123 to ethyl orthosilicate is 1:2, and the stirring time after adding ethyl orthosilicate is 15h; The temperature of the hydrothermal reaction is 90° C., and the time is 15 hours; the final tempe...

Embodiment 3

[0073] Embodiment 3: A kind of preparation method of uniform adjustable chitosan oligosaccharide base in-situ N-doped ordered mesoporous carbon with pore size, specifically comprises the following steps:

[0074] 1) Preparation of SBA-15 ordered mesoporous silica template: Dissolve P123 in HCl solution, and stir evenly in a water bath, slowly add tetraethyl orthosilicate and continue stirring at this temperature, then Pour the mixture into a hydrothermal tank for hydrothermal reaction, cool it, take it out, wash it, then dry it, and then put the product into a tube furnace to heat up and calcinate to obtain a surfactant-free SBA-15 ordered mesoporous silica template ; wherein the concentration of the HCl solution is 6wt%; the temperature of the water bath is 40°C; the mass ratio of P123 to ethyl orthosilicate is 1:3, and the stirring time after adding ethyl orthosilicate is 25h; The temperature of the hydrothermal reaction is 110°C, and the time is 10h; the final temperature i...

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Abstract

The invention discloses a preparation method of chitosan oligosaccharide-based in-situ N-doped ordered mesoporous carbon with uniform and adjustable pore diameter. Chitosan oligosaccharide is used as a carbon and nitrogen source, SBA-15 ordered mesoporous silica is used as a template, and the preparation of the in-situ N-doped ordered mesoporous carbon and the adjustment of the pore diameter are realized by controlling the ultrasonic time and the concentration of added sulfuric acid. The method has the characteristics that the process is simple, the raw materials are easy to obtain, and the pore size of the ordered mesoporous carbon is controllable and adjustable, and the prepared ordered mesoporous carbon is uniform in pore size and good in dispersity and wettability.

Description

technical field [0001] The invention relates to a preparation method of ordered mesoporous carbon, in particular to a preparation method of in-situ N-doped ordered mesoporous carbon with uniform and adjustable chitosan oligosaccharide base. Background technique [0002] Ordered mesoporous carbons (OMCs, Ordered mesoporous carbons) refer to carbon materials with a microscopically ordered structure with a pore diameter in the range of 2 to 50 nm. It not only has the advantages of high specific surface area, large pore volume, adjustable pore size, and easy surface modification, but also has the advantages of high chemical inertness, excellent electrical conductivity, and good biocompatibility. Recent studies have shown that nitrogen-doped ordered mesoporous carbon materials have good application prospects in biomedicine, such as drug delivery, biological detection, gene transfection, photothermal therapy, photodynamic therapy, biosensors and other fields. Especially nitrogen-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
CPCC01B32/05
Inventor 潘红艳林倩曹建新田洪松何顺武陈丹班园红
Owner GUIZHOU UNIV
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