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Preparation method of transparent mesoporous gel monolith with dual-functional-modified hole walls

A dual-function and modified technology, which is applied in the preparation of pore wall dual-function modified transparent mesoporous gel monoliths, the preparation of large-sized, optically transparent mesoporous gel monoliths, and the crack-free field, which can solve the problem of single skeleton composition, etc. The problem is to achieve the effect of enriching the skeleton composition, reducing the preparation cost, and the method is efficient.

Inactive Publication Date: 2015-04-29
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention discloses a method for preparing a transparent mesoporous gel monolith with bifunctional modification of the pore wall. The preparation method of large-size, crack-free, optically transparent mesoporous gel monoliths with simultaneously adjusted property and chargeability can improve the relatively single skeleton composition of existing transparent mesoporous silica gel monoliths, and provide different The regulation of the dispersion state and stability of the guest molecules in the mesoporous gel channel provides a variety of micro-environments, which in turn provides a new class of functionalized matrix materials for the development of new optical devices.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0017] Mix 0.023g of aluminum nitrate, 0.125g of water, 1ml of n-propanol, 0.5g of P123 and 0.925ml of 1,2-bis(triethoxysilyl)ethane at room temperature and stir until the system is completely homogeneous Stirring was continued for 30 minutes. The prepared homogeneous sol was moved into a container with a certain shape, sealed, and then left to stand at a constant temperature at 60°C for 1 hour, and then the container was left open at 60°C for 1.38 hours to gel the system. Then the container was sealed again and aged at a constant temperature of 60°C for 1 day, and finally directly dried at 60°C in the open. After 48 hours, a complete and transparent bifunctional modified mesoporous gel monolith with a container shape was obtained.

Embodiment approach 2

[0019] Stir and mix 0.313g of aluminum nitrate, 1ml of n-propanol, 0.5g of P123 and 0.925ml of 1,2-bis(triethoxysilyl)ethane in turn at room temperature, and continue to stir for 30 minutes after the system is completely homogeneous . The prepared homogeneous sol was moved into a container with a certain shape, sealed, and then kept at a constant temperature of 60°C for 1 hour, and then the container was left open at 60°C for 2 hours to gel the system. Then the container was sealed again and aged at a constant temperature of 60°C for 1 day, and finally directly dried at 60°C in the open. After 48 hours, a complete and transparent bifunctional modified mesoporous gel monolith with a container shape was obtained.

Embodiment approach 3

[0021] Mix 0.094g of aluminum nitrate, 0.094g of water, 1ml of n-propanol, 0.5g of F127 and 0.925ml of 1,2-bis(triethoxysilyl)ethane in turn at room temperature, until the system is completely homogeneous Stirring was continued for 30 minutes. The prepared homogeneous sol was moved into a container with a certain shape, sealed, and then kept at a constant temperature of 60°C for 1 hour, and then the container was left open at 60°C for 2 hours to gel the system. Then the container was sealed again and aged at a constant temperature of 60°C for 1 day, and finally directly dried at 60°C in the open. After 48 hours, a complete and transparent bifunctional modified mesoporous gel monolith with a container shape was obtained.

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Abstract

The invention provides a preparation method of transparent mesoporous gel monolith with dual-functional-modified hole walls. The method is characterized by using ethylidene bridge-bond-type organosilicon ester as a single silicon source, and using mild acidity hydrolyzed by cheap inorganic aluminum salt to induce hydrolysis of the silicon source, without introducing dangerous and corrosive inorganic acid as a hydrolysis catalyst of the silicon source. By adjusting a composition ratio and a gelling way of a system, the transparent mesoporous gel monolith with the hole walls simultaneously modified by the ethylidene and Al atom and with a mole ratio of Si and Al being adjusted in a range of 6-80 can be rapidly prepared. The method is concise, high-efficient and environmental-friendly, the product is regular in shape, adjustable in size and good in transparency, and has important application value in a field of development of novel optical devices. The mesoporous gel monolith with the dual-functional-modified hole walls obtained by removing a template through solvent extraction has a wide application prospect in fields of catalysis, adsorption, separation, etc.

Description

technical field [0001] The invention discloses a method for preparing a transparent mesoporous gel monolith modified with dual functions of the pore wall, which belongs to the technical field of mesoporous molecular sieve functional materials, and specifically relates to a large-sized, crack-free pore wall modified simultaneously by ethylene and Al atoms . A preparation method of optically transparent mesoporous gel monolith. Background technique [0002] The transparent mesoporous gel monolith formed by surfactant as a template has high light transmittance, low external area, and its inherently ordered and adjustable pore structure can make dye molecules, photosensitive molecules, semiconductor particles Or conductive nanowires and other guest molecules can be intercalated at a higher concentration without mutual aggregation between molecules, so they have broad application prospects in the development of new optical devices. [0003] However, as the host material of trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/04C01B37/00
Inventor 王晓钟李祥珍韩灵翠谢克昌
Owner TAIYUAN UNIV OF TECH
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