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Method for preparing UiO-66 based on benzoic acid regulation and chloroform activation and adsorption application

A uio-66, benzoic acid technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of affecting the adsorption of macromolecular dyes, affecting hydrophobicity, low surface area, etc., and achieving low cost , convenient for mass production, high adsorption performance

Inactive Publication Date: 2019-04-09
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional synthetic UiO-66 has some disadvantages, such as low surface area, small pore size, which affect the adsorption of macromolecular dyes, and the structural defects of UiO-66 affect its hydrophobicity.

Method used

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  • Method for preparing UiO-66 based on benzoic acid regulation and chloroform activation and adsorption application
  • Method for preparing UiO-66 based on benzoic acid regulation and chloroform activation and adsorption application
  • Method for preparing UiO-66 based on benzoic acid regulation and chloroform activation and adsorption application

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Embodiment 1

[0024] UiO-66-BA was synthesized by solvothermal method. Specifically, proceed as follows:

[0025] (1) 0.386g (1.67mmol) ZrCl 4 , 0.276g (1.67mmol) H 2 BDC and 6.118g (50.1mmol) of benzoic acid were dissolved in 50ml of DMF solution, stirred evenly and then poured into a stainless steel autoclave lined with polytetrafluoroethylene. where ZrCl 4 :H 2 The molar ratio of BDC:benzoic acid is 1:1:30.

[0026] (2) Then the reaction kettle was heated at 120° C. for 24 hours in a blast drying oven. After the reactor was cooled to room temperature, it was centrifuged to obtain white crystals.

[0027] (3) The obtained white crystals were washed three times with DMF and methanol, then immersed in 100 ml of methanol solution and treated in a reaction kettle at 100° C. for 12 hours, filtered after treatment, washed the filter cake, and dried to obtain a powder.

[0028] (4) The above powder was immersed in chloroform for 5 days, suction filtered, and the obtained sample was centri...

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Abstract

The invention belongs to the field of environmental materials, and discloses a method for preparing UiO-66 based on benzoic acid regulation and chloroform activation and adsorption application thereof. UiO-66 (UiO-66-BA) having a perfect octahedral structure is successfully synthesized by using benzoic acid as regulator and chloroform as an activator, and is proved by using X-ray diffraction (XRD)and Fourier transform infrared spectrum (FTIR) and the like. An adsorption Congo Red dye (CR) experiment proves that the UiO-66-BA material added with benzoic acid and chloroform has high-efficient adsorption performance, has the maximum adsorption capacity of 1371mg / g, which is 7 times that of an unmodified UiO-66 on CR adsorption under the same condition. The method provides important standardto MOF finely synthesized nano-structural materials, the crystal appearance of a material can be regulated, the adsorption performance of the material can be improved, and organic pollutants can be better degraded.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanocomposite materials and environmental materials and their removal of environmental pollutants, and relates to an in-situ method for preparing perfect crystal UiO-66 material (UiO-66-BA) by acid adjustment and chloroform activation and its performance research . Background technique [0002] Metal-organic frameworks (MOFs) represent a new class of microporous materials formed by networks of transition metal ions linked by organic ligands. Due to the properties of high surface area, high porosity, and tunability, MOFs are considered as potential candidates for gas storage, absorption, microelectronics, and catalysis. In the family of MOFs, Zr 6 o 4 (OH) 4 and 1,4-terephthalic acid (H 2 BDC) linkers form a highly packed face-centered cubic (fcc) structure with 12 coordinations (the highest reported coordination for MOFs), which endows Zr-based MOFs (UiO-66) with unique properties such...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/30
Inventor 冯胜王润柏刘曙光倪梓秋
Owner CHANGZHOU UNIV
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