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Method for preparing defect-free MOF-801 film by small seed crystal induced film formation-surfactant post-modification strategy and application thereof

A technology of MOF-801 and surfactant, applied in the field of membrane separation, to achieve the effect of multiple separation possibilities

Inactive Publication Date: 2020-04-24
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is well known that the Zr / carboxylate MOF coordination bond is not as strong as the covalent bond kinetically, and MOF membranes are prone to form defects of different scales during synthesis, activation, and drying.

Method used

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  • Method for preparing defect-free MOF-801 film by small seed crystal induced film formation-surfactant post-modification strategy and application thereof
  • Method for preparing defect-free MOF-801 film by small seed crystal induced film formation-surfactant post-modification strategy and application thereof
  • Method for preparing defect-free MOF-801 film by small seed crystal induced film formation-surfactant post-modification strategy and application thereof

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Embodiment Construction

[0035] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

[0036] 1. Preparation of MOF-801 seed crystal and preparation of seed crystal layer

[0037] 1.1 Preparation of MOF-801 seed crystals

[0038] Fumaric acid (0.405g, 3.5mmol) and ZrOCl 2 ·8H 2 O (0.23g, 0.70mmol) was dissolved in a mixture solvent of DMF / formic acid (35mL / 5.3mL), mixed evenly, poured into a reaction kettle, and reacted at 120°C for 24 hours. Colorless crystals were collected and washed three times with 5 mL of fresh DMF. The solid was then dried under vacuum at 150 °C for 24 hours to obtain an activated sample. It is 69nm ( figure 1 ). X-ray diffraction confirmed that it was consistent with the diffraction data of the original MOF-801 ( figure 2 ).

[0039] 1.2 Preparation of MOF-801 seed layer

[0040] Put the pre-prepared ceramic carrier (sheet or hollow fiber tube) into the prep...

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Abstract

The invention provides a method for preparing a defect-free MOF-801 membrane through a small seed crystal induced membrane forming-surfactant post-modification strategy and an application thereof, which belong to the technical field of membrane separation. The MOF-801 membrane is prepared by adopting a small seed crystal layer-by-layer assembly induced membrane forming method, so that the problemof poor binding force between a porous substrate and the MOF membrane is solved. The MOF-801 membrane is modified by adopting a non-ionic surfactant Span80, so that the defect problem caused by capillary stress in the drying process is solved. The invention provides a novel preparation method of a defect-free metal-organic framework film. The provided technology provides a new method for preparingthe defect-free MOF film, and provides a high-performance selective film for the field of separation.

Description

technical field [0001] The invention relates to a preparation technology of a metal-organic framework film, and in particular provides a method for preparing a defect-free metal-organic framework film by inducing film formation with a small seed crystal and post-modifying a hydrophobic surfactant, and belongs to the technical field of membrane separation. Background technique [0002] Membrane separation technology has attracted extensive attention due to its advantages of low energy consumption, high efficiency, and environmental friendliness, and has important application prospects in solving environmental and energy problems. As a new type of separation membrane, metal-organic framework (MOFs) films have sub-nanometer channels, structural diversity, higher porosity and specific surface area, excellent thermal and mechanical stability, and structural tunability. , adjustable pore size and other unique advantages, it has significant technical advantages in the separation of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/06B01D71/02B01D67/00B01D61/02C02F1/44C02F103/08
CPCB01D61/025B01D67/0051B01D67/0093B01D71/02B01D71/06C02F1/441C02F2103/08
Inventor 董应超付茂李浩天赵赛吕杭洲张功博杨凤林
Owner DALIAN UNIV OF TECH
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