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Octadecano-modified ordered mesoporous carbon material and its preparation method and application

A technology of mesoporous carbon and eighteen carbon is applied in the field of preparation of adsorbent materials, which can solve the problems of weak adsorption capacity and many surface charges, and achieve the effect of wide selectivity.

Active Publication Date: 2020-11-17
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The inventors of the present application have found in research that although ordered mesoporous carbon has size-selective adsorption capacity, it has relatively weak adsorption capacity for compounds with strong hydrophobicity or long carbon chain type due to its surface charge, so it is limited. its application

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  • Octadecano-modified ordered mesoporous carbon material and its preparation method and application
  • Octadecano-modified ordered mesoporous carbon material and its preparation method and application
  • Octadecano-modified ordered mesoporous carbon material and its preparation method and application

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preparation example Construction

[0025] The embodiment of the present application provides a method for preparing an octadecyl-carbon modified ordered mesoporous carbon material, comprising the following steps:

[0026] 1) Add octadecyltrimethoxysilane to the toluene solution, stir and mix at room temperature, and use the toluene solution as a reaction solvent to provide a high-pressure environment for the reaction;

[0027] 2) adding an ordered mesoporous carbon material to the above-mentioned stirred solution and ultrasonically dispersing it evenly;

[0028] 3) Reflux the mixed solution at 180°C±5°C for 24h;

[0029] 4) Take out the reacted mixed solution and filter it with a suction filtration device, wash and dry to obtain an octadecane-modified ordered mesoporous carbon material.

[0030] Wherein, the detergent used in the step 4) is toluene, and the toluene is used as a detergent to remove unreacted octadecyltrimethoxysilane, and the drying temperature in the step 4) is 120°C , to remove residual tolu...

Embodiment 1

[0039] Prepare an ordered mesoporous carbon based on octadecyl carbon modification, the method is as follows:

[0040] Add 0.15mL of octadecyltrimethoxysilane reagent to 20mL of toluene solution and stir magnetically at room temperature for 10min to mix, then add 0.2g of ordered mesoporous carbon material CMK-8, ultrasonically disperse for 20min, then in 185℃ After reflux reaction for 24 hours, the reacted mixture was filtered with a suction filter, washed with toluene, and dried at 120°C for 12 hours. The obtained product was the C18 modified CMK-8 mesoporous carbon adsorption material.

[0041] The reaction principle of the embodiment of the present invention 1:

[0042] The three methoxy groups (-OCH3) connected to silicon in octadecylmethoxysilane are first hydrolyzed into silicon hydroxyl groups (Si-OH); then Si-OH and the hydroxyl groups (- OH) to form a hydrogen bond; during the heating and reflux process, with the dehydration reaction, the Si-OH of the silane forms a ...

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Abstract

The invention relates to the field of functionalized adsorbing materials, and provides a preparation method of a C18-modified ordered mesoporous carbon material. The preparation method comprises the following steps: 1) adding trimethoxyoctadecylsilane in a toluene solution, and stirring and uniformly mixing at room temperature; 2) adding an ordered mesoporous carbon material in the stirred solution and performing uniform ultrasonic dispersion; 3) performing backflow on the mixed solution for 24 h at 175-185 DEG C; and 4) taking out the reacted mixed solution, filtering by a suction filtrationdevice, and washing and drying, thus obtaining the C18-modified ordered mesoporous carbon material. The C18-modified ordered mesoporous carbon material prepared according to the embodiment of the application can enhance the adsorption capacity for organic matters through interactions between carbon chains and the hydrophobic interaction, and nanochannels provided by the ordered mesoporous carbon can eliminate the interference of macromolecular substances through a molecular size effect, so that the purpose of selectively adsorbing micromolecular organic matters is achieved.

Description

technical field [0001] The invention relates to a preparation method of a functionalized ordered mesoporous carbon adsorption material, in particular to a preparation method of octadecyltrimethoxysilane modified ordered mesoporous carbon. Background technique [0002] Ordered mesoporous materials are new nanostructured materials that emerged rapidly in the 1990s. Ordered mesoporous materials due to their highly ordered channels, large specific surface area, high porosity, narrow pore size distribution, regular pore structure, controllable pore size, high thermal and chemical stability and The size effect, surface effect, quantum confinement effect and other characteristics exhibited by its unique structure make it widely used in catalyst carriers, hydrogen storage materials, electrode materials, etc. It has been highly valued by academic circles such as biology and biology, and has rapidly developed into one of the interdisciplinary research hotspots. [0003] Mesoporous c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30
CPCB01J20/20B01J20/28002
Inventor 刘倩王静黄秀江桂斌
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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