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Preparation method of double-mesopore silicon dioxide transparent gel monolith

A silica, double mesoporous technology, applied in crack-free, transparent silica gel monolith and its rapid preparation, double mesoporous silica transparent gel monolith and its preparation, large-scale field, can Solve the problems of industrial production of unfavorable materials, complex operation steps, low preparation efficiency, etc., to achieve the effect of shortening preparation time, simplifying preparation procedures, and improving preparation efficiency

Inactive Publication Date: 2013-07-10
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods generally have harsh requirements on equipment, high energy consumption, very long time (about 8-12 weeks), or complicated operation steps and low preparation efficiency, which are not conducive to the industrial production of such materials

Method used

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  • Preparation method of double-mesopore silicon dioxide transparent gel monolith
  • Preparation method of double-mesopore silicon dioxide transparent gel monolith
  • Preparation method of double-mesopore silicon dioxide transparent gel monolith

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] 1 g of P123, 2 g of TMB, 0.18 g of water, 0.2 g of 1M hydrochloric acid and 2.08 g of TEOS were mixed and stirred at room temperature for 30 minutes to form a homogeneous sol. The prepared sol was moved into a container with a certain shape, sealed, and left to stand at a constant temperature at 45° C. for 1 hour, and then left to stand at 45° C. for 6.5 hours to make the system gel. Then seal the container again and leave it to age at a constant temperature of 45°C for 1 day, and finally directly dry it in the open at 45°C, and obtain a complete double mesoporous silica transparent gel monolith after 48 hours. Then the temperature was raised to 550°C at a rate of 2°C / min and calcined for 6 hours to completely remove the surfactant template to obtain an ordered double mesoporous silica gel monolithic material, which was tested by XRD, TEM, N 2 Analytical tests such as isothermal adsorption show that the obtained material has a combination of cylindrical primary mesopore...

Embodiment approach 2

[0030]1.458 g of P123, 0.18 g of water, 0.2 g of 1M hydrochloric acid and 2.08 g of TEOS were mixed and stirred at room temperature for 30 minutes to form a homogeneous sol. The prepared sol was moved into a container with a certain shape and sealed, and then stood at a constant temperature at 45°C for 1 hour, and then left the container open at 45°C for 7.5 hours to gel the system. Then seal the container again and leave it to age at a constant temperature of 45°C for 1 day, and finally dry it in the open at 45°C. After 48 hours, a complete double mesoporous silica gel monolith is obtained, and then at 2°C / min The temperature was raised to 550°C at a high rate and calcined for 6 hours to completely remove the surfactant template to obtain an ordered double mesoporous silica gel monolithic material, which was tested by XRD, TEM, N 2 Analytical tests such as isothermal adsorption show that the obtained material has a combination of cylindrical primary mesopores and worm-shaped ...

Embodiment approach 3

[0032] 1.458 g of P123, 0.18 g of water, 0.2 g of 1M hydrochloric acid and 2.08 g of TEOS were mixed and stirred at room temperature for 30 minutes to form a homogeneous sol. The prepared sol was moved into a container with a certain shape, sealed, and left to stand at a constant temperature of 60° C. for 1 hour, and then left to stand at 60° C. for 5.5 hours to make the system gel. Then seal the container again and leave it to age at a constant temperature of 60°C for 1 day, and finally directly dry it in the open at 60°C, and obtain a complete double mesoporous silica transparent gel monolith after 40 hours, and the others are the same as in Embodiment 2.

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Abstract

The invention discloses a double-mesopore silicon dioxide transparent gel monolith and a preparation method thereof, which belong to the technical field of inorganic porous materials. The invention particularly relates to a large-size, flawless and transparent silicon dioxide gel monolith with double-mesopore distribution characteristics and a fast preparation method thereof. The silicon dioxide gel monolith is characterized in that the double-mesopore pore-size distribution of the silicon dioxide gel monolith is in a mesoporous region, and is specifically characterized in that: the double-mesopore silicon dioxide transparent gel monolith is provided with the combination of a cylindrical primary mesopore and a worm-like secondary mesopore, and the N2 adsorption isotherms of the cylindrical primary mesopore and the worm-like secondary mesopore are type IV curves having characteristics of a type H1 hysteresis loop. The preparation method has a short synthetic cycle and simple operating steps and is easy to control, the prepared double-mesopore silicon dioxide transparent gel monolith containing a surfactant has a regular shape, a controllable size and high thermal stability and transparency, and is suitable for manufacturing optical materials; and the double-mesopore silicon dioxide transparent gel monolith without the surfactant can be widely applied to catalysis and separation.

Description

technical field [0001] The invention relates to a double mesoporous silica transparent gel monolith and a preparation method thereof, which belong to the technical field of inorganic porous materials, and specifically relate to a large-sized, crack-free, transparent silica gel monolith with double mesoporous distribution characteristics. Stone and its rapid preparation method. Background technique [0002] Transparent mesoporous silica gel monolith 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 objects Molecules are intercalated at a higher concentration without mutual aggregation between molecules, so they have broad application prospects in the development of new optical devices, and silica transparent gel monoliths with two-level or multi-level pore distribution characteristics It can provide different micr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/14
Inventor 王晓钟畅通陈德贵谢克昌
Owner TAIYUAN UNIV OF TECH
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