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Novel magnetic composite catalyst and preparation method thereof

A composite catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low separation efficiency of photogenerated carriers, difficulty in separation and recovery, etc. problems, to achieve the effect of simple operation, easy equipment and simple process flow

Pending Publication Date: 2021-12-10
SHENYANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of catalyst and preparation method for photocatalytic degradation of organic waste water, the present invention will amorphous Co 78 Si 8 B 14 、ZnCo 2 o 4 and g-C 3 N 4 Combined, g-C was first prepared by thermal polymerization 3 N 4 , and then construct ZnCo by a two-step in situ reflux calcination method 2 o 4 / g -C 3 N 4 , and finally prepared Co in situ by mechanical ball milling 78 Si 8 B 14 / ZnCo 2 o 4 / g -C 3 N 4 Magnetic composite catalyst, which integrates adsorption-catalysis-photocatalysis-magnetic separation, solves the problem of / g-C 3 N 4 The separation efficiency of photogenerated carriers in catalysts is low and difficult to separate and recover, and the problem of efficient removal of organic matter

Method used

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Embodiment 1

[0015] The present invention provides a novel amorphous Co 78 Si 8 B 14 / ZnCo 2 o 4 / g -C 3 N 4 Magnetic composite catalyst and preparation method thereof, the specific steps are as follows:

[0016] (1) Preparation of g-C by thermal polymerization 3 N 4 : Weigh 10 grams of urea into a quartz crucible, wrap it tightly with tin foil, place it in a muffle furnace, and calcinate at 550° C. for 3 hours. After the reaction is over, weigh 2 grams of the solid product in the quartz crucible and put it into a 500 ml beaker, add 350 ml of deionized water, continue ultrasonication for 10 hours, and then put it in a drying oven at 90°C for 10 hours to obtain g-C 3 N 4 ;

[0017] (2) Two-step in-situ reflux calcination method to construct ZnCo 2 o 4 / g -C 3 N 4 : First weigh 10 grams of Zn(NO 3 ) 2 and 20 g Co(NO 3 ) 2 Dissolve in 100 ml of deionized water, then slowly drop 1 mol / L sodium hydroxide solution into the beaker until the pH value of the solution is adjusted t...

Embodiment 2

[0020] The present invention provides a novel amorphous Co 78 Si 8 B 14 / ZnCo 2 o 4 / g -C 3 N 4 Magnetic composite catalyst and preparation method thereof, the specific steps are as follows:

[0021] (1) Preparation of g-C by thermal polymerization 3 N 4 : Weigh 15 grams of urea into a quartz crucible, wrap it tightly with tin foil, place it in a muffle furnace, and calcinate it at 600° C. for 2 hours. After the reaction is over, weigh 3 grams of the solid product in the quartz crucible and put it into a 500 ml beaker, add 400 ml of deionized water, continue ultrasonication for 15 hours, then put it in a drying oven at 90 ° C for 9 hours to obtain g-C 3 N 4 ;

[0022] (2) Two-step in-situ reflux calcination method to construct ZnCo 2 o 4 / g -C 3 N 4 : First weigh 15 grams of Zn(NO 3 ) 2 and 20 g Co(NO3) 2 Dissolve in 100 ml of deionized water, then slowly drop 1 mol / L sodium hydroxide solution into the beaker until the pH value of the solution is adjusted to 1...

Embodiment 3

[0025] The present invention provides a novel amorphous Co 78 Si 8 B 14 / ZnCo 2 o 4 / g -C 3 N 4 Magnetic composite catalyst and preparation method thereof, the specific steps are as follows:

[0026] (1) Preparation of g-C by thermal polymerization 3 N 4 : Weigh 5-20 grams of urea into a quartz crucible, wrap it tightly with tin foil, place it in a muffle furnace, and calcinate at 600°C for 3 hours. After the reaction is over, weigh 1-3 grams of the solid product in the quartz crucible and put it into a 500ml beaker, add 450ml of deionized water, continue ultrasonication for 10 hours, then put it in a drying oven at 90°C for 12 hours to obtain g-C 3 N 4 ;

[0027] (2) Two-step in-situ reflux calcination method to construct ZnCo 2 o 4 / g -C 3 N 4 : First weigh 15 grams of Zn(NO 3 ) 2 and 25 g Co(NO 3 ) 2 Dissolve in 100 ml of deionized water, then slowly drop 1 mol / L sodium hydroxide solution into the beaker until the pH value of the solution is adjusted to 10...

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Abstract

The invention discloses a catalyst for photocatalytic degradation of organic wastewater and a preparation method of the catalyst, and relates to a wastewater treatment catalyst and a preparation method of the catalyst. The preparation method comprises steps: preparing g-C3N4 through thermal polymerization; then, constructing a ZnCo2O4 / g-C3N4 compound through a two-step in-situ reflux calcination method; and finally, preparing the Co78Si8B14 / ZnCo2O4 / g-C3N4 magnetic composite catalyst in situ through a mechanical ball milling method. The catalyst integrating adsorption, catalysis, photocatalysis and magnetic separation is prepared, and the problems that a / g-C3N4 catalyst photon-generated carrier is low in separation efficiency and difficult to separate and recycle, and organic matter is efficiently removed are solved.

Description

technical field [0001] The invention relates to a catalyst for treating wastewater and a preparation method thereof, in particular to a catalyst for photocatalytic degradation of organic wastewater and a preparation method thereof. Background technique [0002] with traditional TiO 2 Compared to the organic two-dimensional layered g-C 3 N 4 Low price, suitable energy band, and stable properties, but the shortcomings of poor conductivity, fast carrier recombination, and narrow photoresponse range seriously hinder photocatalytic hydrogen production. Therefore, people have improved the g-C by adjusting the morphology, doping elements, loading co-catalysts, and constructing heterojunctions. 3 N 4 photocatalytic performance. Among them, the construction of heterojunctions can not only improve the separation efficiency of photogenerated carriers, but also expand the range of light absorption, which is an effective strategy to improve the activity of catalysts. [0003] Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J23/80C02F1/30C02F101/30
CPCB01J27/24B01J23/80B01J23/002C02F1/30C02F2305/10C02F2101/30B01J35/33B01J35/39
Inventor 马国峰祁蓝钰张鸿龄
Owner SHENYANG UNIV
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