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An organic-inorganic hybrid photoresponsive adsorbent, preparation method and application

A photoresponse and adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of unfavorable selective adsorption separation system, weaken the steric effect of small molecules, etc., to overcome the adsorption The effects of selectivity reduction, large specific surface area, and large pore volume

Active Publication Date: 2018-01-12
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although its large specific surface area and pore volume have broken through the limitations of traditional microporous molecular sieves in terms of adsorption capacity, the large pore size will inevitably weaken its steric hindrance effect on small molecules, which is not conducive to partial selective adsorption separation systems.

Method used

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  • An organic-inorganic hybrid photoresponsive adsorbent, preparation method and application
  • An organic-inorganic hybrid photoresponsive adsorbent, preparation method and application
  • An organic-inorganic hybrid photoresponsive adsorbent, preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Dissolve 0.025g of organic compound A and 1g of MCM-41 original powder in 10mL of n-hexane, react at 30°C for 15min, remove the solvent by rotary evaporation, and dry at 80°C for 24h. Molecular sieves are dispersed in acidic ethanol solution, and the template agent is removed by extraction.

[0027] Disperse 0.002 g of the molecular sieve in 3 mL of methylene blue and brilliant blue G250 aqueous solutions with a concentration of 25 mg / L respectively, and perform static adsorption for 30 min. Then, the molecular sieve grafted with coumarin derivatives was irradiated with ultraviolet light with a wavelength greater than 310nm, and 0.002g was dispersed in 3mL of methylene blue and brilliant blue aqueous solutions with a concentration of 25mg / L, and statically adsorbed for 30min. After the molecular sieve was illuminated, the adsorption amount of methylene blue decreased from 32.27mg / g to 31.41mg / g, the adsorption amount of brilliant blue G250 decreased from 15.20mg / g to 8....

Embodiment 2

[0029] Dissolve 0.05g of organic compound A and 1g of MCM-41 original powder in 10mL of n-hexane, react at 30°C for 15min, remove the solvent by rotary evaporation, and dry at 80°C for 24h. Molecular sieves are dispersed in acidic ethanol solution, and the template agent is removed by extraction.

[0030] Disperse 0.002 g of the molecular sieve in 3 mL of methylene blue and brilliant blue G250 aqueous solutions with a concentration of 25 mg / L respectively, and perform static adsorption for 30 min. Then, the molecular sieve grafted with coumarin derivatives was irradiated with ultraviolet light with a wavelength greater than 310nm, and 0.002g was dispersed in 3mL of methylene blue and brilliant blue aqueous solutions with a concentration of 25mg / L, and statically adsorbed for 30min. After the molecular sieve was illuminated, the adsorption amount of methylene blue decreased from 30.92mg / g to 29.98mg / g, the adsorption amount of brilliant blue G250 decreased from 13.21mg / g to 5.6...

Embodiment 3

[0032] Dissolve 0.075g of organic compound A and 1g of MCM-41 original powder in 10mL of n-hexane, react at 30°C for 15min, remove the solvent by rotary evaporation, and dry at 80°C for 24h. Molecular sieves are dispersed in acidic ethanol solution, and the template agent is removed by extraction.

[0033] Disperse 0.002 g of the molecular sieve in 3 mL of methylene blue and brilliant blue G250 aqueous solutions with a concentration of 25 mg / L respectively, and perform static adsorption for 30 min. Then, the molecular sieve grafted with coumarin derivatives was irradiated with ultraviolet light with a wavelength greater than 310nm, and 0.002g was dispersed in 3mL of methylene blue and brilliant blue aqueous solutions with a concentration of 25mg / L, and statically adsorbed for 30min. After the molecular sieve was illuminated, the adsorption amount of methylene blue decreased from 28.96 mg / g to 27.87 mg / g, the adsorption amount of brilliant blue G250 decreased from 11.58 mg / g to...

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Abstract

The invention discloses an organic-inorganic hybridization light response adsorbent, a preparation method and application of the organic-inorganic hybridization light response adsorbent. The organic-inorganic hybridization light response adsorbent is subjected to reversible intermolecular dimerization and cleavage reaction by organic-functional groups under irradiation of ultraviolet light with specific wavelength, so that the hole diameter of a molecular sieve is changed, and adsorbates with different sizes are adsorbed selectively. According to the organic-inorganic hybridization light response adsorbent, organisms with light response organic functional groups are grafted on a adsorbent vector, and contain functional group alpha, beta-unsaturated ketone, can perform dimerization reaction under the irradiation of ultraviolet light, and have the following structures A, B or C as shown in the specification.

Description

technical field [0001] The present invention relates to an adsorbent, a preparation method and its application, and more specifically relates to an organic-inorganic hybrid light-responsive adsorbent, a preparation method and its application. Background technique [0002] In recent years, organic-inorganic hybrid porous materials have attracted the interest of many scientific researchers, because they combine inorganic porous materials with excellent physical properties with functional groups New materials with special responses to external stimuli such as pH can have good application prospects in the fields of drug release, adsorption separation, environmental monitoring, and catalytic reactions. [0003] Silicon-based mesoporous molecular sieves have regular pore structure, uniform and continuously adjustable pore size distribution, large specific surface area and good hydrothermal stability, and the abundant silanol on the pore wall is easy to modify, so it is expected to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28
CPCB01J20/22B01J20/3028B01J2220/4812C02F1/285
Inventor 刘晓勤朱竞孙林兵刘定华
Owner NANJING TECH UNIV