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Ionic liquid-modified mesoporous material and preparation method

A technology of ionic liquids and mesoporous materials, applied in the field of nanomaterials, can solve the problems of unreported synthesis, and achieve the effect of simple synthesis method and regular structure

Inactive Publication Date: 2014-09-24
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The synthesis of such materials has not been reported

Method used

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  • Ionic liquid-modified mesoporous material and preparation method
  • Ionic liquid-modified mesoporous material and preparation method
  • Ionic liquid-modified mesoporous material and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1 organosilane A preparation

[0021] Take 4.19g of 3-chloropropyltrimethoxysilane and 10.36g of organosilane precursor 1,2-diimidazolane dissolved in 50mL of anhydrous toluene. After 4-5 times of nitrogen replacement, under the protection of nitrogen, react in the dark at 110oC for 36 hours to obtain a milky yellow oily product. The product is washed with toluene 5-6 times, and the residual toluene is removed by rotary evaporation. Finally, the bridge-shaped bis-imidazole ionic liquid organic silane.

Embodiment 2

[0022] The preparation of embodiment 2 organosilane B-D

[0023] The preparation method of organosilane B—D is the same as that of A in Example 1, except that the precursors of B—D organosilane are 1,3-diimidazolane, 1,4-diimidazolidine, 1, 5-diimidazole pentane.

Embodiment 3

[0024] Example 3 Preparation of Ionic Liquid Modified Mesoporous Material AP

[0025] Dissolve 4.16g of P123, 22g of KCl in 100mL of 2M dilute hydrochloric acid and 30g of water, and stir at 40°C for 2h until the solution is uniform and stable to form solution 1. Dissolve 1.15g of organosilane A and 7.5g of 3-chloropropyltrimethoxysilane in 1ml methanol, and quickly added to solution 1, aged at 40°C for 24h, then transferred to a stuffy tank, crystallized at 100°C for 72h, and the white solid obtained was repeatedly washed with ethanol and centrifuged to obtain a crude product. The crude product was Soxhlet extracted with ethanol for 48 hours, and the obtained solid was dried to obtain the organically modified mesoporous material AP.

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Abstract

The invention relates to an ionic liquid-modified mesoporous material and a preparation method, which is characterized in that a SBA-15 mesoporous material precursor prepared by a sol-gel method and a transition metal-supported methoxy silicon source-bridged bis-imidazole ionic liquid as organic modification groups, and copolycondensation is employed for preparing ionic liquid-modified mesoporous material. The mesoporous material can be expressed by a general formula M-BIM-PMO, M is one or more of transition metals Co, Cu, Mn, Zn and Ni, BIM is the bis-imidazole ionic liquid such as one or more of 1,2- bis-imidazole ethane 1,3-bis-imidazole propane, and 1,4-bis-imidazole butane 1,5-bis-imidazole pentane ionic liquid, PMO is bridged organic group midified mesoporous material, which can be defined as the ordered mesoporous organosilicon material. The ionic liquid modified mesoporous material has the advantages that the dispersion of the organic group is uniform, channels are not obstructed, the specific surface area is large, and the organic ingredient is difficult to lose. The mesoporous material has wide application prospect on the aspects of catalysis and adsorption.

Description

technical field [0001] The invention belongs to nanometer materials, in particular to an organically modified mesoporous material and its preparation. Background technique [0002] PMO is a kind of organically modified mesoporous material. In terms of structure, it is an organically modified mesoporous silicon oxide material prepared by using a bridge-like organosilicon source as a precursor. Due to the use of bridge-shaped organosilanes, the organic groups can be uniformly dispersed on the surface of the material and in the pore walls. This structural feature enables the organic groups to be uniformly dispersed in the material, not easy to block the pores, and has a large loading capacity and higher stability. Therefore, this material has a very wide range of applications in the fields of catalysts and adsorption. [0003] As a green solvent, imidazole-based ionic liquid has the characteristics of low vapor pressure, low toxicity, high thermal stability and easy regulatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J35/10B01J20/22B01J20/28
Inventor 徐杰郑玺孙志强王敏高进苗虹
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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