MIL-101/PDVB composite material for adsorbing benzene gas as well as preparation method and application of MIL-101/PDVB composite material

A composite material and gas technology, applied in the field of MIL-101/PDVB composite material and its preparation, can solve the problems of small surface area, confinement, hydroxyl attack, etc.

Pending Publication Date: 2021-07-23
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, MIL-101 has a strong hydrophilicity, mainly due to the weak chromium-oxygen coordination, which is easily attacked by hydroxyl groups in water molecules, resulting in the collapse of the structure and a sharp decrease in the adsorption capacity.
Polydivinylbenzene is a kind of high molecular polymer with mesoporous structure and ultra-high cross-linking. It has excellent pore volume and ultra-high hydrophobicity and lipophilicity; but its surface area is small and the pore Too large and limited in handling small molecule contaminants

Method used

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  • MIL-101/PDVB composite material for adsorbing benzene gas as well as preparation method and application of MIL-101/PDVB composite material
  • MIL-101/PDVB composite material for adsorbing benzene gas as well as preparation method and application of MIL-101/PDVB composite material
  • MIL-101/PDVB composite material for adsorbing benzene gas as well as preparation method and application of MIL-101/PDVB composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] a. At room temperature, mix 2ml of deionized water, 20ml of tetrahydrofuran, 1.6g of divinylbenzene, 0.4g of methacrylic acid, and 0.05g of azobisisobutyronitrile and stir for 4-8h, then pour into polytetrafluoroethylene water In a thermal reaction kettle, keep warm at 100°C for 24h, cool with the furnace until the solvent is volatilized, and then place it in a vacuum drying oven at 60°C for 12h and grind to obtain carboxyl-modified PDVB (hereinafter referred to as A), the structural formula is as follows:

[0030]

[0031] Polydivinylbenzene (PDVB) is an adsorption resin with high specific surface area, large pore volume, controllable pore size, good chemical stability and other characteristics, so it is used as a gas adsorbent; and PDVB brings The benzene ring structure makes the composite material have excellent hydrophobic properties, which improves the competitive adsorption capacity of PDVB for benzene gas. In the present invention, combined with the unique por...

Embodiment 2

[0038] This embodiment is basically the same as Embodiment 1, the difference is: "0.149gA (the proportion of carboxyl-modified PDVB in the MIL-101 / PDVB composite material used to adsorb benzene gases is 5%), 2g Nine Chromium nitrate water, 0.2g sodium hydroxide, 0.83g terephthalic acid, 25ml ionized water, mix and sonicate, as follows:

[0039] a. This step is identical with the step of embodiment one;

[0040] b. 0.149gA (the proportion of carboxy-modified PDVB in the MIL-101 / PDVB composite material used to adsorb benzene gases is 5%), 2g chromium nitrate nonahydrate, 0.2g sodium hydroxide, 0.83g p-benzene Diformic acid, 25ml ionic water, mix and sonicate to obtain precursor solution B, namely MIL-101 / PDVB precursor solution;

[0041] c. This step is the same as the step in Embodiment 1;

[0042] d. This step is the same as the step in Embodiment 1;

[0043] e. this step is identical with the step of embodiment one;

[0044] The MIL-101 / PDVB composite material used for th...

Embodiment 3

[0046] This embodiment is basically the same as Embodiment 1, the difference is: "0.181gA (the proportion of carboxyl-modified PDVB in the MIL-101 / PDVB composite material used to adsorb benzene gases is 6%), 2g Nine Water Chromium Nitrate, 0.2g Sodium Hydroxide, 0.83g Terephthalic Acid, 25ml Ionized Water, mixed and sonicated", as follows:

[0047] a. This step is identical with the step of embodiment one;

[0048] b. 0.181gA (the proportion of carboxy-modified PDVB in MIL-101 / PDVB used to adsorb benzene gases is 6%), 2g chromium nitrate nonahydrate, 0.2g sodium hydroxide, 0.83g terephthalic acid , 25ml of ionized water, mixed and sonicated to obtain precursor solution B, namely MIL-101 / PDVB precursor solution;

[0049] c. This step is the same as the step in Embodiment 1;

[0050] d. This step is the same as the step in Embodiment 1;

[0051] e. this step is identical with the step of embodiment one;

[0052] The MIL-101 / PDVB composite material used for the adsorption of ...

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Abstract

The invention belongs to the field of indoor air purification materials, and particularly relates to an MIL-101 / PDVB composite material for adsorbing benzene gas and a preparation method and application thereof.The preparation method comprises the steps that divinyl benzene, methacrylic acid, tetrahydrofuran, azodiisobutyronitrile and deionized water are mixed and stirred for 4 h, the mixture is put into a polytetrafluoroethylene hydrothermal reaction kettle, heat preservation is conducted for 24 h at the temperature of 100 DEG C, cooling is carried out to volatilize the solvent, and then vacuum drying is carried out to obtain carboxyl modified PDVB; sodium hydroxide, chromium nitrate nonahydrate, terephthalic acid, carboxyl modified PDVB and deionized water are subjected to ultrasonic mixing, the mixture is put into a polytetrafluoroethylene hydrothermal reaction kettle for a reaction, heat preservation is conducted for 18-24 h at the temperature of 150-170 DEG C, and then purification and drying are conducted to obtain the MIL-101 / PDVB composite material. The MIL-101 / PDVB composite material provided by the invention has relatively good adsorption performance on benzene, methylbenzene and o-xylene.

Description

technical field [0001] The invention belongs to the field of indoor air purification materials, and in particular relates to a MIL-101 / PDVB composite material used for adsorbing benzene gases and a preparation method and application thereof. Background technique [0002] In industry, benzene, toluene, and xylene are often collectively referred to as triphenyl. Among these three substances, benzene is the most harmful to the human body. Benzene gas is a typical volatile organic compound, which is highly carcinogenic and can cause cancer and a series of blood diseases. Benzene is a colorless, sweet-smelling transparent liquid at room temperature with a strong aromatic odor. Due to the high volatility of benzene, it is easy to spread when exposed to the air. Humans and animals inhale or contact a large amount of benzene into the body, which will cause acute and chronic benzene poisoning. Commonly used benzene gas treatment methods include adsorption method, condensation metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30B01D53/02C08F212/36C08F220/06C08G83/00
CPCB01J20/226B01J20/265B01J20/28095B01J20/28054B01D53/02C08F212/36C08G83/008B01D2257/7027C08F220/06
Inventor 付猛刘旭程皓秦保洋
Owner CHANGZHOU UNIV
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