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Preparation method of ZIF-8@g-C3N4 catalyst with zeolite structure

A ZIF-8, g-c3n4 technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of low utilization of sunlight and visible light catalysts. The problem of poor catalytic effect, etc., achieves the effect of high carrier separation efficiency, easy large-scale production, and simple preparation method.

Pending Publication Date: 2020-12-18
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Therefore, the technical problem to be solved by the present invention is to provide a preparation method of a zeolite structure ZIF-8@g-C3N4 catalyst, and the preparation method of this composite visible light catalyst can solve the problem of visible light catalysts prepared in the prior art. The technical problems of poor catalytic effect and low utilization rate of sunlight

Method used

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  • Preparation method of ZIF-8@g-C3N4 catalyst with zeolite structure
  • Preparation method of ZIF-8@g-C3N4 catalyst with zeolite structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1) Weigh 50g of urea and grind it evenly.

[0041] 2) Transfer (1) to an alumina crucible with a cover, and roast it in a muffle furnace at 475°C for 4 hours in an air atmosphere, with a heating rate of 4°C / min, and then cool to room temperature to obtain a yellow powder that is a layered g -C3N4.

[0042] 3) Weigh barbitic acid, zinc nitrate, dimethylimidazole and g-C3N4 respectively according to the mass ratio of 0.2:1:2:1, disperse g-C3N4 in 40ml of methanol solution, sonicate for 0.5h, and then Barbic acid was added to the mixture and stirred for 0.5h.

[0043] 4) Dissolve zinc nitrate in (3) and continue stirring for 1 h. At the same time, dimethylimidazole was dissolved in 40ml of methanol solution and stirred for 1h.

[0044] 5) Add the dimethylimidazole solution dropwise into the mixed solution of g-C3N4, barbic acid and zinc nitrate under stirring condition, then stir at room temperature for 1 h, and let stand for 3 h.

[0045] 6) Centrifuge, wash repeatedl...

Embodiment 2

[0048] 1) Weigh 50g of urea and grind it evenly.

[0049] 2) Transfer (1) to an alumina crucible with a cover, and bake in a muffle furnace at 500°C for 3h in an air atmosphere, with a heating rate of 3°C / min, and then cool to room temperature to obtain a yellow powder that is a layered g -C3N4.

[0050] 3) Weigh barbitic acid, zinc nitrate, dimethylimidazole and g-C3N4 respectively according to the mass ratio of 0.2:1:2:2.5, disperse g-C3N4 in 40ml of methanol solution, sonicate for 0.75h, and then Barbic acid was added to the mixture and stirred for 1h.

[0051] 4) Dissolve zinc nitrate in (3) and continue stirring for 1 h. At the same time, dimethylimidazole was dissolved in 40ml of methanol solution and stirred for 1h.

[0052] 5) Add the dimethylimidazole solution dropwise into the mixed solution of g-C3N4, barbic acid and zinc nitrate under the condition of stirring, then stir at room temperature for 1 h, and let stand for 5 h.

[0053] 6) Centrifuge, wash repeatedly...

Embodiment 3

[0056] 1) Weigh 50g of urea and grind it evenly.

[0057] 2) Transfer (1) to an alumina crucible with a cover, and bake in a muffle furnace at 550°C for 4h under an air atmosphere, with a heating rate of 4°C / min, and then cool to room temperature to obtain a yellow powder that is a layered g -C3N4.

[0058] 3) Weigh barbitic acid, zinc nitrate, dimethylimidazole and g-C3N4 respectively according to the mass ratio of 0.2:1:2:5, disperse g-C3N4 in 40ml of methanol solution, sonicate for 1h, and then Add more than acid to the mixture and stir for 2h.

[0059] 4) Dissolve zinc nitrate in (3) and continue stirring for 2h. At the same time, dimethylimidazole was dissolved in 40ml of methanol solution and stirred for 2h.

[0060] 5) Add the dimethylimidazole solution dropwise into the mixed solution of g-C3N4, barbic acid and zinc nitrate under stirring condition, then stir at room temperature for 2h, and let stand for 8h.

[0061] 6) Centrifuge, wash repeatedly with methanol and...

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Abstract

The invention discloses a preparation method of a ZIF-8@g-C3N4 catalyst with a zeolite structure. The preparation method comprises the following steps: uniformly grinding urea; transferring into an aluminum oxide crucible with a cover, roasting for 2-4h at 475-550 DEG C in an air atmosphere, and then cooling to room temperature to obtain layered g-C3N4; respectively weighing barbic acid, zinc nitrate, dimethylimidazole and g-C3N4, dispersing g-C3N4 into a methanol solution, carrying out ultrasonic treatment, adding barbic acid into a mixed solution, and uniformly stirring; dissolving zinc nitrate in the mixed solution, and continuously and uniformly stirring; meanwhile, dissolving dimethylimidazole into the methanol solution, and uniformly stirring; dropwise adding a dimethylimidazole solution into the mixed solution of g-C3N4, barbic acid and zinc nitrate under a stirring condition, stirring at room temperature, and standing; centrifuging, repeatedly washing with methanol and absoluteethyl alcohol, drying in vacuum, and grinding to obtain the ZIF-8@g-C3N4 composite catalyst material. The composite photocatalyst can be separated, recovered and recycled, the preparation method is simple, the controllability is high, and large-scale production is easy to realize.

Description

technical field [0001] The invention relates to the field of inorganic functional materials, and relates to a catalyst for degrading organic matter in wastewater, in particular to a method for preparing a zeolite structure catalyst ZIF-8@g-C3N4. Background technique [0002] With the increasingly serious problem of eutrophication in water bodies and the increasingly stringent discharge standards of ammonia nitrogen and organic matter, advanced wastewater treatment technology has become a topic of widespread concern to scholars at home and abroad. Among them, the cold rolling units in the iron and steel industry are all involved in the pickling of strip steel. In order to realize the recycling of waste acid, acid regeneration units are designed and arranged. Most hydrochloric acid regeneration units are equipped with a silicon removal process, which will inevitably lead to excessive NH3-N in wastewater (NH3-N mainly comes from ammonia water in the silicon removal process) and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J27/24B01J35/10C02F1/30C02F101/30
CPCB01J31/1815B01J31/1691B01J27/24C02F1/30C02F2101/308C02F2305/10B01J35/61B01J35/39
Inventor 高时庄侯红娟宋俊徐明韦树捷
Owner BAOSHAN IRON & STEEL CO LTD
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