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Preparation method and application of coumarin-modified metal organic framework hybrid material

A metal-organic framework and hybrid material technology, which is applied in the field of preparation of coumarin-modified metal-organic framework hybrid materials, can solve the problems of limiting the application of adsorption desulfurization, uncontrollable pore structure and properties, and desorption of adsorbates. Achieve the effects of adsorption, reduction of pore volume and number of micropores, and developed microporous structure

Pending Publication Date: 2021-02-23
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pore structure and properties of traditional porous materials cannot be adjusted. Although they have good adsorption capacity, it is difficult to effectively desorb the adsorbate, which severely limits the practical application of adsorption desulfurization.

Method used

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  • Preparation method and application of coumarin-modified metal organic framework hybrid material
  • Preparation method and application of coumarin-modified metal organic framework hybrid material
  • Preparation method and application of coumarin-modified metal organic framework hybrid material

Examples

Experimental program
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Embodiment 1

[0032] Preparation of metal-organic framework HKUST-1: Weigh 2.077g copper nitrate trihydrate and dissolve it in 15mL deionized water, then weigh 1.0g trimesic acid and dissolve it in 15mL ethanol and 15mL N,N-dimethylformamide (DMF ) in the mixed solution. The above two solutions were mixed and reacted at 100°C for 10h. Cool to room temperature, remove the supernatant, add methanol solution to soak for 24 hours, remove the supernatant again, add methane to soak for 24 hours, and dry at room temperature to obtain HKUST-1.

[0033] Preparation of coumarin-modified metal-organic framework hybrid materials: Weigh 0.171g of 7-hydroxycoumarin and dissolve it in 30mL of methanol, then add 0.0648g of sodium methoxide, and reflux at 67°C for 3h to obtain deprotonated 7-hydroxycoumarin Hydroxycoumarin. Then, weigh 0.684g of metal-organic framework HKUST-1 and dissolve it in 3mL of 67°C methanol, continue to add deprotonated 7-hydroxycoumarin, react at 67°C for 8h, filter, wash, and d...

Embodiment 2

[0037]Preparation of metal-organic framework HKUST-1: Weigh 2.077g copper nitrate trihydrate and dissolve it in 15mL deionized water, then weigh 1.0g trimesic acid and dissolve it in 15mL ethanol and 15mL N,N-dimethylformamide (DMF ) in the mixed solution. The above two solutions were mixed and reacted at 100°C for 10h. Cool to room temperature, remove the supernatant, add methanol solution to soak for 24 hours, remove the supernatant again, add methane to soak for 24 hours, and dry at room temperature to obtain HKUST-1.

[0038] Preparation of coumarin-modified metal-organic framework hybrid materials: Weigh 0.342g of 7-hydroxycoumarin and dissolve it in 30mL of methanol, then add 0.0648g of sodium methoxide, and reflux at 67°C for 3h to obtain deprotonated 7- Hydroxycoumarin. Then, weigh 0.684g metal-organic framework HKUST-1 and dissolve it in 3mL of 67°C methanol, then add deprotonated 7-hydroxycoumarin to it, react at 67°C for 8h, filter, wash, and dry. Obtain coumarin...

Embodiment 3

[0042] Preparation of metal-organic framework HKUST-1: Weigh 2.077g copper nitrate trihydrate and dissolve it in 15mL deionized water, then weigh 1.0g trimesic acid and dissolve it in 15mL ethanol and 15mL N,N-dimethylformamide (DMF ) in the mixed solution. The above two solutions were mixed and reacted at 100°C for 10h. Cool to room temperature, remove the supernatant, add methanol solution to soak for 24 hours, remove the supernatant again, add methane to soak for 24 hours, and dry at room temperature to obtain HKUST-1.

[0043] Preparation of coumarin-modified metal-organic framework hybrid materials: Weigh 0.513g of 7-hydroxycoumarin and dissolve it in 30mL of methanol, then add 0.0648g of sodium methoxide, and reflux at 67°C for 3h to obtain deprotonated 7- Hydroxycoumarin. Then, weigh 0.684g metal-organic framework HKUST-1 and dissolve it in 3mL of 67°C methanol, then add deprotonated 7-hydroxycoumarin to it, react at 67°C for 8h, filter, wash, and dry. Obtain coumari...

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Abstract

The invention discloses a preparation method and application of a coumarin-modified metal-organic framework hybrid material. According to the invention, the coumarin-modified metal-organic framework hybrid material is prepared by coordination of deprotonated coumarin molecules and unsaturated metal sites of a metal-organic framework based on a post-synthesis modification method, wherein a mass ratio of the coumarin molecules to the metal-organic framework is (0.1-1): 1. Coumarin has excellent photoisomerism and can be subjected to a dimerization reaction under the irradiation of ultraviolet light with a wavelength larger than 310 nm, a generated dimer enables the specific surface area and pore volume of the material to be increased, and micropores are more developed, so adsorption of thiophene sulfide is facilitated; after irradiation by 254-nm short-wave ultraviolet, the coumarin dimer is subjected to ring opening cracking to form a monomer, a pore structure is recovered, and high-efficiency desorption of thiophene sulfide is realized. The coumarin-modified metal organic framework hybrid material has good application value in the field of adsorption desulfurization of fuel oil.

Description

technical field [0001] The invention belongs to the technical field of preparation of metal-organic framework hybrid materials, and in particular relates to a preparation method and application of a coumarin-modified metal-organic framework hybrid material. Background technique [0002] Thiophene sulfides widely exist in fuel oil, and the sulfur-containing compounds produced by the combustion of these substances can cause serious corrosion of equipment and serious pollution to the environment. As the desulfurization standards of fuel oil become more and more stringent, the removal of thiophene sulfide from fuel oil has become a key point in the production of low-sulfur fuels. Hydrodesulfurization is a common method for desulfurization of fuel oil, which can effectively remove sulfides and disulfides in fuel oil, but it is difficult to remove thiophene sulfides. The adsorption separation technology has mild reaction, simple process and low cost. It is considered to be one of...

Claims

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Application Information

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IPC IPC(8): B01J20/24C10G25/00B01J20/30
CPCB01J20/24B01J20/226C10G25/00C10G2300/202
Inventor 朱竞钟顺戴勇
Owner YANCHENG INST OF TECH