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A magnetic zif-8 coated fe 3 o 4 /g-c 3 no 4 Composite catalyst, preparation method and application

A technology of ZIF-8 and composite catalysts, which is applied in physical/chemical process catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc. It can solve the problems of low utilization rate of sunlight and poor catalytic effect of visible light catalysts, etc. problem, to achieve the effect of wide spectral response range, excellent visible light catalytic effect, and simple preparation process

Active Publication Date: 2022-06-28
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the above technical problems, the invention provides a magnetic ZIF-8 coated Fe 3 o 4 / g -C 3 N 4 A method for preparing a novel composite catalyst, the method for preparing a composite visible light catalyst can solve the technical problems of the poor catalytic effect of the visible light catalyst prepared in the prior art and the low utilization rate of sunlight

Method used

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  • A magnetic zif-8 coated fe <sub>3</sub> o <sub>4</sub> /g-c <sub>3</sub> no <sub>4</sub> Composite catalyst, preparation method and application
  • A magnetic zif-8 coated fe <sub>3</sub> o <sub>4</sub> /g-c <sub>3</sub> no <sub>4</sub> Composite catalyst, preparation method and application
  • A magnetic zif-8 coated fe <sub>3</sub> o <sub>4</sub> /g-c <sub>3</sub> no <sub>4</sub> Composite catalyst, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Preparation of ZIF-8 Porous Matrix

[0046] According to the mass ratio of 1:2 zinc nitrate and dimethylimidazole were weighed, dispersed into methanol solution, ultrasonically treated for 1 h, then left to stand for 12 h, filtered, washed and dried to obtain ZIF-8 porous matrix material.

[0047] (2) ZIF-8 surface modification

[0048] The ZIF-8 obtained in step (1) and the sodium lignosulfonate are ground and mixed in a mortar according to the mass ratio of 1:5, washed with ethanol, filtered and dried to obtain the surface-modified ZIF-8 to ensure the iron in the later stage. Ions and urea only enter into the pores of ZIF-8, so they will not be adsorbed on its surface.

[0049] (3) Solution filling of ZIF-8

[0050] ZIF-8 is immersed in the mixed solution of ferric nitrate and urea after the modification of step (2) for 24h, and is immersed again after filtering every 6 hours, wherein product (2): the mass ratio of ferric nitrate and urea is controlled at 1:1:5...

Embodiment 2

[0057] (1) Preparation of ZIF-8 Porous Matrix

[0058] According to the mass ratio of 1:2 zinc nitrate and dimethylimidazole were weighed, dispersed into methanol solution, ultrasonically treated for 1 h, then left to stand for 10 h, filtered, washed and dried to obtain ZIF-8 porous matrix material.

[0059] (2) ZIF-8 surface modification

[0060] The ZIF-8 obtained in step (1) and the sodium lignosulfonate are ground and mixed in a mortar according to the mass ratio of 1:10, washed with ethanol, filtered and dried to obtain the surface-modified ZIF-8 to ensure the iron in the later stage. Ions and urea only enter into the pores of ZIF-8, so they will not be adsorbed on its surface.

[0061] (3) Solution filling of ZIF-8

[0062] ZIF-8 after step (2) gained modification is immersed in the mixed solution of ferric nitrate and urea for 48h, re-dipping after filtering every 6 hours, wherein product (2): the mass ratio of ferric nitrate and urea is controlled at 1:1:10 range. ...

Embodiment 3

[0069] (1) Preparation of ZIF-8 Porous Matrix

[0070] According to the mass ratio of 1:2 zinc nitrate and dimethylimidazole were weighed, dispersed into methanol solution, ultrasonically treated for 1 h, then left to stand for 12 h, filtered, washed and dried to obtain ZIF-8 porous matrix material.

[0071] (2) ZIF-8 surface modification

[0072] The ZIF-8 obtained in step (1) and the sodium lignosulfonate are ground and mixed in a mortar according to the mass ratio of 1:10, washed with ethanol, filtered and dried to obtain the surface-modified ZIF-8 to ensure the iron in the later stage. Ions and urea only enter into the pores of ZIF-8, so they will not be adsorbed on its surface.

[0073] (3) Solution filling of ZIF-8

[0074] ZIF-8 after the gained modification of step (2) is immersed in the mixed solution of ferric nitrate and urea for 24h, and is immersed again after filtering every 6 hours, wherein the mass ratio of product (2) ferric nitrate and urea is controlled at...

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Abstract

The invention discloses a magnetic ZIF-8 coated Fe 3 o 4 / g‑C 3 N 4 Preparation method of composite catalyst, including preparation of ZIF-8 porous matrix, ZIF-8 surface modification, solution filling of ZIF-8, ZIF-8 coated Fe 3 o 4 / g‑C 3 N 4 Catalyst preparation. The invention also discloses the above-mentioned composite catalyst, the interior of the composite catalyst is carrier ZIF-8, and the channel of ZIF-8 is Fe 3 o 4 , the outermost layer is C 3 N 4 . Also disclosed is the application of the composite catalyst as a photocatalyst in degrading organic matter in acid-containing wastewater. The new composite catalyst described has a simple preparation process, no pollution, and has excellent visible light catalytic effect, which can effectively solve the problems of poor catalytic effect of existing visible light catalysts, low utilization rate of sunlight, and pollution of the preparation process. It can effectively degrade the organic matter in acid-containing wastewater, and realize the discharge of organic matter in acid-containing wastewater.

Description

technical field [0001] The invention belongs to the field of inorganic functional materials, and relates to a catalyst for degrading organic matter in wastewater, in particular to a magnetic ZIF-8 coated Fe 3 O 4 / g-C 3 N 4 Preparation method of new composite catalyst. Background technique [0002] With the increasingly serious problem of water eutrophication and the increasingly strict emission standards of ammonia nitrogen and organic matter, the technology of advanced treatment of wastewater has become a topic of widespread concern for scholars at home and abroad. Among them, cold rolling units in the steel industry all involve pickling of strip steel. In order to realize the recycling of waste acid, acid regeneration units will be designed and arranged. Most of the hydrochloric acid regeneration units are equipped with a silicon removal process, which will inevitably bring NH in wastewater when the silicon removal device is running. 3 -N exceeds the standard (NH 3 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/10C02F1/30C02F101/30
CPCB01J27/24C02F1/30C02F2305/10C02F2101/40C02F2101/308B01J35/33B01J35/61
Inventor 高时庄卢勇侯红娟宋俊宋艳丽
Owner BAOSHAN IRON & STEEL CO LTD
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