Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing high specific surface area three-dimensional mesoporous active aluminum oxide by hard template

A high specific surface area, activated alumina technology, applied in the direction of alumina/aluminum hydroxide, etc., can solve the problems of low specific surface area and limited application, and achieve the effect of easy operation and low cost

Inactive Publication Date: 2008-12-17
BEIJING UNIV OF TECH
View PDF1 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hard templates (mesoporous silicon and mesoporous carbon) used in this method are both two-dimensional and have a low specific surface area (less than 1000m 2 / g), so that the pores of the obtained mesoporous activated alumina are two-dimensional structure and the specific surface area is low (less than 400m 2 / g), which limits its application in adsorption and catalysis
[0003] So far, there are no literatures and patents at home and abroad on the synthesis of three-dimensional mesoporous activated alumina with high specific surface area using three-dimensional mesoporous silicon template SBA-16 and three-dimensional mesoporous carbon as templates.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing high specific surface area three-dimensional mesoporous active aluminum oxide by hard template
  • Method for preparing high specific surface area three-dimensional mesoporous active aluminum oxide by hard template
  • Method for preparing high specific surface area three-dimensional mesoporous active aluminum oxide by hard template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Synthesis of polyhedral three-dimensional ordered mesoporous SBA-16:

[0027] (a) At room temperature, add EO to 0.4mol / L hydrochloric acid solution 106 PO 70 EO 106 and cetyltrimethylammonium bromide, under vigorous stirring, add tetraethyl orthosilicate, among them, tetraethyl orthosilicate, hydrochloric acid, EO 106 PO 70 EO 106 The mol ratio with cetyltrimethylammonium bromide is 1: 3.5: 0.005: 0.0038;

[0028] (b) Transfer the mixture obtained in step (a) to an autoclave and heat-treat it at a constant temperature of 95°C for 5 days, filter and wash with deionized water, and then dry it at 60°C for 12 hours;

[0029](c) Put the solid powder obtained in step (b) in a muffle furnace, heat up to 550°C at a rate of 1°C / min and burn at this temperature for 3 hours to obtain a polyhedral three-dimensional ordered mesoporous SBA -16, its specific surface area, average pore diameter and pore volume are shown in Table 1;

[0030] 2) Synthesis of three-dimensional ...

Embodiment 2

[0038] 1) Synthesis of spherical three-dimensional mesoporous SBA-16:

[0039] (a) At room temperature, add EO to 0.8mol / L hydrochloric acid solution 106 PO 70 EO 106 and cetyltrimethylammonium bromide, under vigorous stirring, add tetraethyl orthosilicate, among them, tetraethyl orthosilicate, hydrochloric acid, EO 106 PO 70 EO 106 The mol ratio with cetyltrimethylammonium bromide is 1: 6.9: 0.002: 0.0038;

[0040] (b) with step 1)-(a) in embodiment 1;

[0041] (c) Place the solid powder obtained in step (b) in a muffle furnace, heat up to 550°C at a rate of 1°C / min and burn at this temperature for 3 hours to obtain spherical three-dimensional mesoporous SBA-16, Its specific surface area, average pore diameter and pore volume are shown in Table 1;

[0042] 2) Synthesis of three-dimensional worm-like mesoporous carbon:

[0043] (a) with step 2)-(a) in embodiment 1;

[0044] (b) repeat step (a) 3 times;

[0045] (c) with step 2)-(c) in embodiment 1;

[0046] (d) wash...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for utilizing a hard template to prepare three-dimensional mesoporous active aluminium oxide with high specific surface area, belonging to the technical field of the preparation of solid mesoporous material. The existing mesoporous active aluminium oxide has the problems of undeveloped pore canal structure and small specific surface area, etc.; the method provided by the invention adopts tetraethoxysilane as a raw material and uses triblock copolymer (EO106PO70EO106) and hexadecyl trimethyl ammonium bromidec as a soft-template agent; three-dimensional mesoporous SBA-16 with different shapes is synthesized by hydro-thermal reaction; then the three-dimensional mesoporous SBA-16 is used as the hard template and sucrose is used as a carbon source to prepare the three-dimensional mesoporous carbon; finally, the three-dimensional mesoporous carbon is used as the hard template, aluminium nitrate is used as an aluminium source, absolute ethyl alcohol is used as a solvent, the three-dimensional mesoporous active aluminium oxide with high specific surface area is synthesized by the processes of a plurality of times of dipping and ignition in the radiation of ultrasonic wave. The method of the invention has low cost and simple and convenient operation, and the prepared three-dimensional mesoporous active aluminium oxide has the advantages of narrow pore size distribution and large specific surface area, etc.

Description

technical field [0001] The invention belongs to the technical field of preparation of solid mesoporous materials, and in particular relates to a method for preparing three-dimensional mesoporous activated alumina with high specific surface area by using three-dimensional mesoporous carbon as a hard template. Background of the invention [0002] Activated alumina is widely used as a catalyst, carrier and adsorbent, etc., and it is extremely important to control its specific surface area, pore size and distribution. In recent years, with the establishment of nanofabrication technology, the controllable synthesis of porous solid materials has become possible. Mesoporous activated alumina has the advantages of high specific surface area and developed pore structure, which is beneficial to the dispersion of active components and the adsorption and diffusion of reactant molecules. However, most of the pore structure of mesoporous activated alumina is destroyed under high temperatu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01F7/02
Inventor 戴洪兴张磊邓积光何洪訾学红
Owner BEIJING UNIV OF TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com