Preparation method of in situ n-doped ordered mesoporous carbon with uniform tunable chitosan oligosaccharide

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

Active Publication Date: 2022-05-03
GUIZHOU UNIV
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  • 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 disadvantages, thus limiting the application in the biomedical field
Using the rich nitrogen and oxygen groups of chitosan oligosaccharides, the prepared materials can be doped with nitrogen in situ to improve the hydrophilicity of the surface of ordered mesoporous carbon, and solve the problem of poor wettability and dispersibility of mesoporous carbon. regulation and other issues

Method used

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  • Preparation method of in situ n-doped ordered mesoporous carbon with uniform tunable chitosan oligosaccharide
  • Preparation method of in situ n-doped ordered mesoporous carbon with uniform tunable chitosan oligosaccharide
  • Preparation method of in situ n-doped ordered mesoporous carbon with uniform tunable chitosan oligosaccharide

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Embodiment 1

[0061] Embodiment 1: A method for preparing in-situ N-doped ordered mesoporous carbon with uniform pore size and adjustable chitosan oligosaccharide base, specifically comprising 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, then 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: A method for preparing in-situ N-doped ordered mesoporous carbon with uniform pore size and adjustable chitosan oligosaccharide base, specifically comprising 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, then 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 15h; the final temperature i...

Embodiment 3

[0073] Embodiment 3: A method for preparing in-situ N-doped ordered mesoporous carbon with uniform pore size and adjustable chitosan oligosaccharide base, which specifically includes 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, then 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 temperatu...

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Abstract

The invention discloses a method for preparing in-situ N-doped ordered mesoporous carbon with uniform pore size and adjustable chitosan oligosaccharides, using chitosan as a carbon and nitrogen source and SBA‑15 ordered mesoporous silica as a template The preparation of in-situ N-doped ordered mesoporous carbon and the adjustment of pore size were achieved by controlling the ultrasonic time and the concentration of sulfuric acid. The invention has the characteristics of simple process, readily available raw materials, controllable and adjustable pore size of the ordered mesoporous carbon, and the prepared ordered mesoporous carbon has uniform pore size, good dispersibility 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 Patents(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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