Organic framework derived nitrogen-carbon nano-material as well as preparation method and application thereof

A carbon nanomaterial, organic framework technology, applied in chemical instruments and methods, catalyst activation/preparation, water/sludge/sewage treatment, etc., to achieve a wide range of pH, avoid dissolution and secondary pollution problems, and good regeneration performance Effect

Inactive Publication Date: 2019-08-23
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

ZIF-8-derived nitrogen-doped carbon N-C material activates PDS to degrade organic matter and its mechanism has not been reported yet

Method used

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  • Organic framework derived nitrogen-carbon nano-material as well as preparation method and application thereof
  • Organic framework derived nitrogen-carbon nano-material as well as preparation method and application thereof
  • Organic framework derived nitrogen-carbon nano-material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for preparing an organic framework derived nitrogen-carbon nanomaterial, the specific steps are as follows:

[0040] (1) Preparation of precursor ZIF-8: 3.22g of Zn(NO 3 ) 2 ·6H 2 O was dissolved in 250mL methanol and stirred to form Zn(NO 3 ) 2 The solution is ready for use; 3.29g of 2-methylimidazole is dissolved in 250mL of methanol and stirred and dissolved to form a 2-methylimidazole solution for subsequent use; the 2-methylimidazole solution is slowly added to Zn(NO 3 ) 2 Stir in the solution for 5 minutes, age for 24 hours, centrifuge and wash with methanol for 3 times, and dry in an oven at 60°C for 12 hours;

[0041] (2) Preparation of organic framework-derived nitrogen-carbon nanomaterials: the ZIF-8 precursor was heated to 900°C at 2°C / min in a nitrogen atmosphere, annealed for 3h, and then the black powder was pickled with 0.5M sulfuric acid solution for 24h to remove excess The elemental zinc nanoparticles were washed 3 times with water and dri...

Embodiment 2

[0044] A preparation method and application of an organic framework derived nitrogen-carbon nanomaterial, the specific steps are as follows:

[0045] (1) Preparation of precursor ZIF-8: 5.06g of Zn(NO 3 ) 2 ·6H 2 O was dissolved in 250mL methanol and stirred to form Zn(NO 3 ) 2 The solution is ready for use; 3.29g of 2-methylimidazole is dissolved in 250mL of methanol and stirred and dissolved to form a 2-methylimidazole solution for subsequent use; the 2-methylimidazole solution is slowly added to Zn(NO 3 ) 2 Stir in the solution for 5 minutes, age for 24 hours, centrifuge and wash with methanol for 3 times, and dry in an oven at 60°C for 12 hours;

[0046] (2) Preparation of organic framework-derived nitrogen-carbon nanomaterials: the ZIF-8 precursor was heated to 900°C at 2°C / min in a nitrogen atmosphere, annealed for 3h, and then the black powder was pickled with 0.5M sulfuric acid solution for 24h to remove excess The elemental zinc nanoparticles were washed 3 times...

Embodiment 3

[0052] A preparation method and application of an organic framework-derived nitrogen-carbon nanomaterial, the specific steps are as follows:

[0053] (1) Preparation of precursor ZIF-8: 6.44g of Zn(NO 3 ) 2 ·6H 2 O was dissolved in 250mL methanol and stirred to form Zn(NO 3 ) 2 The solution is ready for use; 3.29g of 2-methylimidazole is dissolved in 250mL of methanol and stirred and dissolved to form a 2-methylimidazole solution for subsequent use; the 2-methylimidazole solution is slowly added to Zn(NO 3 ) 2 Stir in the solution for 5 minutes, age for 24 hours, centrifuge and wash with methanol for 3 times, and dry in an oven at 60°C for 12 hours;

[0054] (2) Preparation of organic framework-derived nitrogen-carbon nanomaterials: the ZIF-8 precursor was heated to 900°C at 2°C / min in a nitrogen atmosphere, annealed for 3h, and then the black powder was pickled with 0.5M sulfuric acid solution for 24h to remove excess The elemental zinc nanoparticles were washed 3 times...

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Abstract

The invention relates to an organic framework derived nitrogen-carbon nano-material as well as a preparation method and application thereof. According to the preparation method, an organic framework material ZIF-8 is used as a precursor and is subjected to annealing treatment for 3 h through a nitrogen gas atmosphere at 600 to 1100 DEG C so as to obtain the organic framework derived nitrogen-carbon nano-material. When the organic framework derived nitrogen-carbon nano-material is applied to wastewater treatment, a certain amount of the nitrogen-carbon material is used as a peroxydisulfate activating agent and is added into a beaker, and is magnetically stirred to degrade organic matters in wastewater. Compared with the prior art, the nano-material provided by the invention has the advantages that the size is small, the dispersity in a water solution system is good, a peroxydisulfate activating process is simple to operate, no metal is dissolved out, the repeated utilization performanceis stable and an applicable pH (Potential of Hydrogen) range is wide, and the nano-material has a wide prospect in industrial wastewater treatment.

Description

technical field [0001] The invention relates to the preparation of nanometer materials, in particular to an organic framework-derived nitrogen-carbon nanometer material and its preparation method and application. Background technique [0002] The advanced oxidation technology based on persulfate activation reaction is catalyzed by persulfate (PMS) and peroxodisulfate (PDS) to generate highly active sulfate radicals (SO4 ·- ,2.5-3.1V) and famous. with other oxidizing agents H 2 o 2 , O 3 , MnO 4 2- Compared with others, persulfate (PS) has shown the advantages of environmental friendliness, high stability, high solubility, long residence time in water environment and high standard redox potential (2.01V), so persulfate It has become an emerging alternative oxidant. PDS and PMS are two acidic oxidants, both of which contain O-O bonds, and the O-O bonds can be broken to generate strong oxidizing sulfate radicals with the assistance of external energy. Common hydroxyl ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/08C02F1/72C02F101/34C02F101/36C02F101/38
CPCB01J27/24B01J35/0013B01J37/086C02F1/722C02F1/725C02F2101/34C02F2101/345C02F2101/36C02F2101/38
Inventor 毛舜刘莹堵宁杰杨玉霖
Owner TONGJI UNIV
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