Cobalt-doped gel and preparation method thereof

A gel, wet gel technology, applied in glass manufacturing equipment, manufacturing tools, glass molding, etc., can solve problems such as unreported, achieve convenient preparation process, shorten gelation time, reduce chemical stability and The effect of mechanical strength

Inactive Publication Date: 2016-08-10
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation of cobalt-doped gels with cobalt-doped hollow glass microspheres with photoinduced hydrogen release effect by sol-gel method has not been reported.

Method used

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  • Cobalt-doped gel and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment includes the following steps:

[0033] (1) Add 90mL of absolute ethanol to a round bottom flask, add 120mL of tetraethyl orthosilicate and 60mL of tributyl borate into the ethanol solvent, add 20mL of deionized water, add hydrochloric acid dropwise to adjust the pH of the solution to 3~5, and Hydrolyze in 60 ℃ constant temperature oil bath stirring pot 7h, stirring rate is 220r / min, obtain about 290ml silicon boron sol;

[0034] (2) At room temperature, 22.20g LiAc·2H 2 O, 12.80gNaAc·3H 2 O, 0.47gKAc, 3.20gAlNO 3 9H 2 O and 0.40gCo(NO 3 ) 2 ·6H 2 O was stirred and dissolved in 80mL deionized water, filtered to obtain about 110ml salt solution; the mol ratio of the obtained salt solution was aluminum nitrate: lithium acetate: sodium acetate: potassium acetate: cobalt salt=43:1088:470:24:182;

[0035] (3) First add the partially hydrolyzed silicon boron sol prepared in step (1) into 60 mL of ethanol, then add the salt solution prepared in step (2) i...

Embodiment 2

[0038] This embodiment includes the following steps:

[0039] (1) Add 45mL of absolute ethanol to a round bottom flask, add 60mL of tetraethyl orthosilicate and 30mL of tributyl borate into the ethanol solvent, add 10mL of deionized water, add hydrochloric acid dropwise to adjust the pH of the solution to 3~5, and Hydrolyze in 60 ℃ constant temperature oil bath stirring pot for 6h, stirring rate is 220r / min, obtain about 145ml silicon boron sol;

[0040] (2) At room temperature, 11.10g LiAc·2H 2 O, 6.40gNaAc·3H 2 O, 0.24gKAc, 1.60gAlNO 3 9H 2 O and 2.05gCoSO 4 ·7H 2 O was stirred and dissolved in 40mL deionized water, filtered to obtain about 55ml salt solution; the mol ratio of the obtained salt solution was aluminum nitrate: lithium acetate: sodium acetate: potassium acetate: cobalt salt=43:1088:470:24:73;

[0041] (3) First add the partially hydrolyzed silicon boron sol prepared in step (1) into 30 mL of ethanol, then add the salt solution prepared in step (2) to the ...

Embodiment 3

[0044] This embodiment includes the following steps:

[0045] (1) Add 90mL of absolute ethanol to a round bottom flask, add 120mL of tetraethyl orthosilicate and 60mL of tributyl borate into the ethanol solvent, add 20mL of deionized water, add hydrochloric acid dropwise to adjust the pH of the solution to 3~5, and Hydrolyze in 60 ℃ constant temperature oil bath stirring pot 7h, stirring rate is 220r / min, obtain about 290ml silicon boron sol;

[0046] (2) At room temperature, 22.20g LiAc·2H 2 O, 12.80gNaAc·3H 2 O, 0.47gKAc, 3.20gAlNO 3 9H 2 O and 4.54gCoAc 2 4H 2 O was stirred and dissolved in 80mL deionized water, filtered to obtain about 110ml salt solution; the mol ratio of the obtained salt solution was aluminum nitrate: lithium acetate: sodium acetate: potassium acetate: cobalt salt=43:1088:470:24:7;

[0047] (3) First add the partially hydrolyzed silicon boron sol prepared in step (1) into 60 mL of ethanol, then add the salt solution prepared in step (2) into the s...

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Abstract

The invention provides a cobalt-doped gel and a preparation method thereof. The preparation method is achieved by a sol-gel method combined with a technical route containing an acid catalytic hydrolysis and a base catalytic hydrolysis to prepare a cobalt-doped sol. The method is as below: preparing the raw materials of tetraethoxysilane and tributyl borate under the conditions of 60-70 DEG C, pH value of 3-5, and deionized water in substoichiometry into a silicon-boron sol; meanwhile, preparing a salt solution of alkali metal, aluminum and cobalt; adding the salt solution into the silicon-boron sol by multiple times, and further hydrolyzing the borosilicate sol under basic conditions to obtain a homogeneous cobalt-doped sol; and sealing the cobalt-doped sol and allowing to stand at 80-120 DEG C for gelation, aging and drying. By changing the composition and content of raw materials, the method can obtain the cobalt-doped gel with controllable compressive strength and half-life insurance of the cobalt-doped hollow glass microspheres.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials and their preparation, and in particular relates to a cobalt-doped gel and a preparation method thereof. Background technique [0002] Hollow glass microspheres are hydrogen storage containers with good application prospects. Cobalt-doped hollow glass microspheres have a photo-induced hydrogen release effect, that is, at room temperature, a fast diffusion channel of gas connected to the inside and outside is formed by light, so as to realize the controllable release of hydrogen. Using cobalt-doped hollow glass microspheres as hydrogen storage containers can realize the controllable release of gas at room temperature, and has the advantages of safety, high efficiency, and controllability. [0003] In order to obtain high energy storage density, hydrogen needs to be compressed and stored in hollow glass microspheres. Therefore, cobalt-doped hollow glass microspheres are us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/091C03B8/02
CPCC03B19/1065C03B19/12C03C3/091
Inventor 李芳李波冯建鸿李婧张占文苏琳刘梅芳李洁漆小波
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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