Preparation method for polyacid @ MIL-101 composite material and application of polyacid @ MIL-101 composite material

A composite material, polytungstate technology, applied in chemical instruments and methods, other chemical processes, adsorption water/sewage treatment, etc., can solve the problem of polyacid shedding, low specific surface area, affecting the interaction between active sites and guest molecules and other problems, to achieve the effect of easy separation, stable structure and simple method

Inactive Publication Date: 2014-05-07
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are two problems in the field of polyacids that have been hindering the further application and industrialization of polyacid compounds
First, the specific surface area is low, which affects the interaction between the active site and the guest molecule
The second is that the water solubility is strong, which hinders the recycling and reuse of polyacid compounds
However, this strategy has the risk of polyacid falling off in the liquid phase reaction, and the stability of the composite needs to be improved.

Method used

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  • Preparation method for polyacid @ MIL-101 composite material and application of polyacid @ MIL-101 composite material
  • Preparation method for polyacid @ MIL-101 composite material and application of polyacid @ MIL-101 composite material
  • Preparation method for polyacid @ MIL-101 composite material and application of polyacid @ MIL-101 composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Tetramethylammonium hydroxide (2.37 mmol), terephthalic acid (10 mmol), chromium nitrate (10 mmol) were dissolved in 50 ml deionized water successively, followed by 0.6-6.0 g K 4 PW 11 VO 40 Add it into the above solution and stir for 20 minutes, divide the above solution into 10 parts, transfer them to 20 mL autoclave respectively, react at 185°C for 3 days, and naturally cool to room temperature to obtain a green powder, which is PW 11 VMIL-101.

Embodiment 2

[0024] Example 2: Dissolve tetramethylammonium hydroxide (2.37 mmol), terephthalic acid (10 mmol), and chromium nitrate (10 mmol) in 50 ml deionized water, followed by 0.6-6.0 g H 3 PW 12 o 40 Add it into the above solution and stir for 20 minutes, divide the above solution into 10 parts, transfer them to 20 mL autoclave respectively, react at 180°C for 2 days, and naturally cool to room temperature to obtain a green powder, which is PW 12 MIL-101.

Embodiment 3

[0025] Example 3: Tetramethylammonium hydroxide (2.37 mmol), terephthalic acid (10 mmol), chromium nitrate (10 mmol) were dissolved in 50 ml deionized water successively, followed by 0.6-6.0 g K 4 SiW 12 o 40 Add it into the above solution and stir for 20 minutes, divide the above solution into 10 parts, transfer them to 20 mL autoclave respectively, react at 175°C for 3 days, and naturally cool to room temperature to obtain a green powder, which is SiW 12 MIL-101.

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Abstract

The invention belongs to the technical field of inorganic composite materials and particularly relates to a preparation method for an MIL-101 composite material based on Keggin type poly-tungstate and a molecule-group porous material, and an application of dye absorption of the MIL-101 composite material. The material is prepared from the Keggin type poly-tungstate, tetramethylammonium hydroxide, terephthalic acid and chromic nitrate which are used as raw materials by adopting a hydrothermal method. The prepared material can be used for adsorbing a cation organic dye; the adsorption rate to methylene blue within short time can be up to 98% and the adsorption effect is obviously higher than that of a pure MIL-101 material and is higher than the adsorption capability of active carbon. The preparation method has the characteristics of being easy and convenient to prepare and rapid and efficient in adsorption; the prepared material has a wide acid-base applicable range, is easy to separate and can be repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical composite materials, and in particular relates to a method for preparing composite materials based on Keggin type polytungstate and molecular-based porous material MIL-101 and its application in dye adsorption. Background technique [0002] There are many kinds of dyes, which bring brilliant and colorful colors to people's life and generate huge economic benefits, but a large amount of dye wastewater produced is discharged into environmental water bodies, resulting in the pollution of natural water bodies. The problem of water pollution not only affects and restricts the development of our country's economy, but also endangers the health of residents and even the stability of society. Therefore, dye wastewater treatment is one of the important problems to be solved urgently in today's society. [0003] Metal-organic frameworks (MOFs) are an important molecular-based porous functional m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/30C02F1/28
Inventor 张志明闫爱学王恩波
Owner NORTHEAST NORMAL UNIVERSITY
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