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Bimetallic organic framework derived porous carbon as well as preparation method and application thereof

A metal-organic framework, organic framework technology, applied in alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problem of inability to eliminate or reduce the toxicity of heavy metals, high production cost of carbon nanotubes, adsorption Unsatisfactory effect and other problems, to achieve the effect of good reduction effect, simple and feasible preparation method, and easy unified treatment

Active Publication Date: 2020-09-25
BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the production cost of carbon nanotubes is high, and it is difficult to apply on a large scale; the regeneration of activated carbon is difficult, and it is difficult to reuse; materials such as metal oxides and ion exchange resins have small specific surface areas, and the adsorption effect is not ideal.
Moreover, most of the current adsorbents only have adsorption function and cannot eliminate or reduce the toxicity of heavy metals.

Method used

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  • Bimetallic organic framework derived porous carbon as well as preparation method and application thereof
  • Bimetallic organic framework derived porous carbon as well as preparation method and application thereof
  • Bimetallic organic framework derived porous carbon as well as preparation method and application thereof

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preparation example Construction

[0039] The invention provides a method for preparing porous carbon derived from a bimetallic organic framework, comprising the following steps:

[0040] 1) Preparation of Metal Organic Framework A:

[0041] Dissolving the metal salt A and the organic ligand in an organic solvent at a reaction temperature of 130-200° C., reacting for 10-20 hours, and post-processing to obtain the metal-organic framework A.

[0042] The metal ions in the metal salt A are used as the metal nodes of the framework material in the bimetallic organic framework derived porous carbon provided by the present invention, and not only have the function of supporting the framework material, but also have the function of adsorption sites.

[0043] The bimetallic organic framework derived porous carbon provided by the invention is used for removing heavy metal pollutants in water bodies, especially hexavalent chromium with very high toxicity. Therefore, it is preferable to use highly reducible metal ions as me...

Embodiment 1

[0106] Step 1: FeCl 3 ·6H 2 O (0.674g), H 2 The mixture of BDC (0.415g) and 56mL DMF was sonicated at room temperature to make it a transparent solution, and then transferred to a 100mL polytetrafluoroethylene-lined reactor. The reactor was placed in a blast dryer and heated to 150 ℃, and kept at this temperature for 15h. After the reaction, the reaction kettle was naturally cooled to room temperature to obtain a tan solution containing solids. The solution was centrifuged to obtain a reddish-brown solid, which was washed with DMF until colorless, and then washed with ethanol until colorless. The solid was dried under vacuum at 100° C. for 12 h to obtain MIL-53(Fe) powder.

[0107] Step 2: Add 0.38192g CuCl 2 2H 2 O was dissolved in 100ml of pure water, then 1g of MIL-53(Fe) powder was added, ultrasonically treated for 30min, the slurry was heated to 333k (60°C) in a rotary evaporator to remove water, evaporated to complete dryness, and the material was removed from the ...

Embodiment 2

[0110] Reaction condition is substantially identical with embodiment 1, difference is:

[0111] CuCl 2 2H 2 The mass of O was 0.191g, and 1 / 4Cu@MIL-53(Fe) powder was obtained; after the powder was subjected to pyrolysis treatment under the same conditions as in Example 1, 1 / 4Cu@FexC-800 organic framework derived porous carbon material was obtained.

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Abstract

The invention provides bimetallic organic framework derived porous carbon as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a metal salt A and an organic ligand in a specific ratio in an organic solvent for reaction, and performing post-treatment to obtain a metal organic framework A; carrying out ultrasonic treatment and heating reaction on the metal organic framework A and metal salt B in a specific ratio in water, and performing pyrolysis carbonization on a solid obtained by drying in an inert gas atmosphere to obtain the bimetal organic framework derived porous carbon. The preparation method of the bimetallic organic framework derived porous carbon provided by the invention is simple and feasible and is high in reproducibility. The prepared bimetallic organic framework derived porous carbon is loose and porous but has a complete framework structure, so that the adsorption effect is improved; the method can be used for removing heavy metal pollutants in water.

Description

technical field [0001] The invention relates to the field of heavy metal treatment in sewage, in particular to metal-organic framework-derived porous carbon for reducing and adsorbing heavy metal pollutants in sewage. Background technique [0002] With the continuous acceleration of industrialization and the deepening of agricultural technology in recent decades, heavy metals have been discharged into rivers, lakes and seas, which has an increasingly serious impact on the environment. Heavy metal pollution has become an important and widely concerned worldwide problem. . [0003] The problem of heavy metal water pollution in my country is very prominent, and the pollution rate of the bottom of rivers, lakes and reservoirs is as high as 80.1%. Since most heavy metals are highly toxic and difficult to be decomposed in the environment, they are extremely harmful pollutants to water pollution. Heavy metals are extremely difficult to degrade. In addition to ionic forms, heavy m...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/22
CPCB01J20/20B01J20/28054C02F1/283C02F2101/22
Inventor 袁冬海张文静寇莹莹严陈玲
Owner BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE