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Core/shell-type iron-based metal organic framework photo-Fenton catalyst, preparation and application thereof

A metal-organic framework, iron-based metal technology, applied in the field of environmental water treatment, can solve the problems of easy dissolution of active component iron ions, poor catalyst stability, low reaction efficiency, etc., achieve high stability, slow down aggregation, and improve reaction rate. Effect

Inactive Publication Date: 2016-08-10
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main problem of most traditional heterogeneous Fenton catalysts is that the reaction efficiency is not high during application; it is still required to obtain the optimal removal effect at a pH value of 2-4; the stability of the catalyst is poor, and the active group in the reaction process Ferric ions are easy to dissolve, causing catalyst deactivation and other problems

Method used

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  • Core/shell-type iron-based metal organic framework photo-Fenton catalyst, preparation and application thereof
  • Core/shell-type iron-based metal organic framework photo-Fenton catalyst, preparation and application thereof
  • Core/shell-type iron-based metal organic framework photo-Fenton catalyst, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In this example, a core-shell iron-based metal-organic framework photo-Fenton catalyst is prepared by the following steps:

[0044] (1) 1.56g FeCl 3 Place in 50mL of ethylene glycol, stir until completely dissolved, then add 5.75g of anhydrous sodium acetate, stir until completely dissolved, then transfer to a reaction kettle for hydrothermal reaction, after the reaction is completed, cool to room temperature, pass through a magnet The applied external magnetic field separates the black precipitate, which produces Fe 3 o 4 The microsphere core was washed with a large amount of distilled water and absolute ethanol respectively. 3 o 4 Microsphere core, followed by Fe 3 o 4 The microsphere core is dispersed in absolute ethanol and stored for later use;

[0045] (2) Fe obtained from step (1) 3 o 4 The core of the microspheres was dried in a vacuum oven at 60 °C, and then 0.2 g of Fe was weighed 3 o 4 The microsphere core was added to 40mL ethanol solution containi...

Embodiment 2

[0065] In this example, a core-shell iron-based metal-organic framework photo-Fenton catalyst is prepared by the following steps:

[0066] (1) 1.56g FeCl 3 Place in 50mL of ethylene glycol, stir until completely dissolved, then add 5.75g of anhydrous sodium acetate, stir until completely dissolved, then transfer to a reaction kettle for hydrothermal reaction, after the reaction is completed, cool to room temperature, pass through a magnet The applied external magnetic field separates the black precipitate, which produces Fe 3 o 4 The microsphere core was washed with a large amount of distilled water and absolute ethanol respectively. 3 o 4 Microsphere core, followed by Fe 3 o 4 The microsphere core is dispersed in absolute ethanol and stored for later use;

[0067] (2) Fe obtained from step (1) 3 o 4 The core of the microspheres was dried in a vacuum oven at 60 °C, and then 0.2 g of Fe was weighed 3 o 4 The microsphere core was added to 40mL ethanol solution containi...

Embodiment 3

[0072] In this example, a core-shell iron-based metal-organic framework photo-Fenton catalyst is prepared by the following steps:

[0073] (1) 1.56g FeCl 3 Place in 50mL of ethylene glycol, stir until completely dissolved, then add 5.75g of anhydrous sodium acetate, stir until completely dissolved, then transfer to a reaction kettle for hydrothermal reaction, after the reaction is completed, cool to room temperature, pass through a magnet The applied external magnetic field separates the black precipitate, which produces Fe 3 o 4 The microsphere core was washed with a large amount of distilled water and absolute ethanol respectively. 3 o 4 Microsphere core, followed by Fe 3 o 4 The microsphere core is dispersed in absolute ethanol and stored for later use;

[0074] (2) Fe obtained from step (1) 3 o 4 The core of the microspheres was dried in a vacuum oven at 60 °C, and then 0.2 g of Fe was weighed 3 o 4 The microsphere core was added to 40mL ethanol solution containi...

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Abstract

The invention relates to a core / shell-type iron-based metal organic framework photo-Fenton catalyst which includes a Fe3O4 microsphere core and a multilayer adsorption shell layer coating the surface thereof. The adsorption shell layer is a metal organic framework shell layer, wherein the metal organic framework is an iron-based metal organic framework being MIL-100 (Fe). During preparation, with the Fe3O4 as the core and the MIL-100 (Fe) as the adsorption shell layer, the core / shell-type iron-based metal organic framework photo-Fenton catalyst having different shell layer thicknesses is synthesized through a layer-by-layer assembly method. With assistance of visible light, the catalyst is used for heterogeneous Fenton catalytic degradation of organic pollutants in wastewater. Compared with the prior art, the core / shell-type catalyst can prevent loss of the core component Fe3O4. The shell layer can effectively solve a problem of agglomeration. Through synergy of catalytic activity of Fe3O4 and the MIL-100 (Fe), the pollutants adsorbed on the surface of the shell layer is catalytically degraded. The catalyst has high activity, simple preparation process, low cost and excellent application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental water treatment, and relates to a metal-organic framework photo-Fenton catalyst and its preparation and application, in particular to a core-shell iron-based metal-organic framework photo-Fenton catalyst and its preparation and application. Background technique [0002] Since the 1970s, water pollution has become a global problem. With the development of the national economy and human society, the modern chemical industry has produced a large amount of wastewater containing organic matter, which has complex components, high toxicity, high organic matter content, and poor biodegradability. Although some obvious results have been achieved in the treatment of organic refractory wastewater through legislation and economic means around the world, it is still a long and difficult process to achieve complete treatment. Therefore, it is an urgent problem to find a new, efficient, convenient and env...

Claims

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Application Information

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IPC IPC(8): B01J31/28C02F1/30C02F1/72
Inventor 赵红颖钱霖吕焕莉赵国华
Owner TONGJI UNIV
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