Method for preparing meso-porous SiO2 by using long chain tertiary amine
A long-chain tertiary amine and mesoporous technology, which is applied in the field of synthesis of mesoporous SiO2, can solve the problems of difficult separation of soft templates and difficult recycling of surfactants, and achieves the effects of simple operation, mild reaction conditions and pollution reduction.
Inactive Publication Date: 2015-04-15
JIANGNAN UNIV
View PDF3 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The purpose of the present invention is to solve the traditional surfactant to form micelles to prepare mesoporous SiO 2 In the method of post-processing, the soft template is difficult to separate from the channel, and the surfactant is difficult to recycle.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] Embodiment Example 1: Take 0.85g of N,N-dimethyl n-dodecylamine in a bottle, add 36g of deionized water, under 1.1atm CO 2 Stir under pressure until the solution is completely clear, then add 3.72 g of disodium edetate (Na 2 EDTA·2H 2 0), stirred for 1h until the solution was completely clear, added dropwise 4.16g tetraethyl orthosilicate, at 1.1atm CO 2 Under pressure, stand at 20°C for 6 days. After the reaction, a white solid was obtained by filtration, washed alternately with water and acetone for 5 times, and dried in vacuum to obtain mesoporous SiO 2 ; The filtrate was allowed to stand for stratification, and the oil layer was removed from acetone and a small amount of water to recover N, N-dimethyl n-dodecylamine.
[0016] Infrared analysis of the sample found that it was consistent with typical mesoporous SiO 2 Infrared diagram, and -CH 3 、-CH 2 The peak is extremely weak.
[0017] The X-ray diffraction analysis of the sample found that there is a strong ...
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
| Property | Measurement | Unit |
|---|---|---|
| pore size | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a novel synthetic method of meso-porous SiO2. The method comprises the following steps: introducing CO2 to a tertiary amine / water mixed solution to form a micelle solution of long chain tertiary amine bicarbonate, adding disodium ethylene diamine tetraacetate and tetraethyl orthosilicate, and reacting at a constant temperature in CO2 environment for 1-6d; filtering after the reaction, washing the obtained white solid product by water and acetone to remove the long chain tertiary amine in order to obtain meso-porous SiO2 particles; and removing acetone and water from the obtained filtrate to recover tertiary amine. The method has the advantages of mild reaction conditions and no generation of harmful gases in the reaction process; a template can be removed through directly washing after the reaction, so the operation is simple, and the inorganic skeleton structure is not destroyed; and the long chain tertiary amine can be reused, so the cost is saved, and the pollution is reduced.
Description
technical field [0001] The invention relates to a synthetic mesoporous SiO 2 The method belongs to the technical field of colloid and interface chemistry. Background technique [0002] Mesoporous materials are porous materials with a large surface area and a special pore structure with a pore size between 2 and 50 nm. Because of its regular pore structure, narrow pore size distribution, and good thermal stability and certain hydrothermal stability, this material is widely used in catalysis, adsorption, separation, medical implant materials, drug carriers, enzymes, etc. Immobilization, optics, electricity, magnetism and many other fields have potential application value, and become one of the frontier fields of current hot research. [0003] Mesoporous molecular sieves are usually prepared by the template method. The process is to firstly use ordered surfactant aggregates or other ordered aggregates as a template, and self-assemble between the template agent and the precurs...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
Inventor 蒋建中代利郑饶君张婷崔正刚
Owner JIANGNAN UNIV