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Organic metal framework derived cobalt/nitrogen carbon nano material as well as preparation method and application thereof

A nano-material and organometallic technology, applied in chemical instruments and methods, other chemical processes, water/sewage treatment, etc., can solve the problem of lack of activated PS degraded organic matter, and achieve secondary pollution without serious problems, stable catalytic performance, Excellent regeneration performance

Inactive Publication Date: 2019-11-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is a lack of relevant reports on the activation of PS by ZIF-67-derived cobalt / nitrogen-carbon nanomaterials to degrade organic matter

Method used

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  • Organic metal framework derived cobalt/nitrogen carbon nano material as well as preparation method and application thereof
  • Organic metal framework derived cobalt/nitrogen carbon nano material as well as preparation method and application thereof
  • Organic metal framework derived cobalt/nitrogen carbon nano material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for preparing an organic framework derived cobalt / nitrogen carbon nanomaterial and its use for activating peroxodisulfate to remove refractory pollutants, the specific steps are as follows:

[0045] (1) Preparation of the precursor ZIF-67: 2.50 g of Co(NO 3 ) 2 ·6H 2 O to make Co(NO 3 ) 2 Solution is standby; In 250mL methyl alcohol, the 2-methylimidazole of stirring and dissolving 3.28g makes 2-methylimidazole solution standby; Under stirring, to Co(NO 3 ) 2Slowly pour 2-methylimidazole solution into the solution, let it stand for aging at room temperature for 24 hours, centrifuge the formed purple product, wash it with methanol three times, and dry it in an oven at 60°C for 12 hours.

[0046] (2) Preparation of cobalt / nitrogen-carbon nanomaterials derived from organic framework: In an argon atmosphere, the ZIF-67 precursor was heated to 900°C at 2°C / min, and maintained for 3h, and the resulting black powder product was placed in 0.5M sulfuric acid The s...

Embodiment 2

[0061] A method for preparing an organic framework derived cobalt / nitrogen carbon nanomaterial and its use for activating peroxodisulfate to remove refractory pollutants, the specific steps are as follows:

[0062] (1) Preparation of the precursor ZIF-67: 2.50 g of Co(NO 3 ) 2 ·6H 2 O to make Co(NO 3 ) 2 Solution is standby; In 250mL methyl alcohol, the 2-methylimidazole of stirring and dissolving 3.28g makes 2-methylimidazole solution standby; Under stirring, to Co(NO 3 ) 2 Slowly pour 2-methylimidazole solution into the solution, let it stand for aging at room temperature for 24 hours, centrifuge the formed purple product, wash it with methanol three times, and dry it in an oven at 60°C for 12 hours.

[0063] (2) Preparation of cobalt / nitrogen-carbon nanomaterials derived from organic framework: In an argon atmosphere, the ZIF-67 precursor was heated to 900°C at 2°C / min, and maintained for 3h, and the resulting black powder product was placed in 0.5M sulfuric acid The ...

Embodiment 3

[0066] A method for preparing an organic framework derived cobalt / nitrogen carbon nanomaterial and its use for activating peroxodisulfate to remove refractory pollutants, the specific steps are as follows:

[0067] (1) Preparation of the precursor ZIF-67: 2.50 g of Co(NO 3 ) 2 ·6H 2 O to make Co(NO 3 ) 2 Solution is standby; In 250mL methyl alcohol, the 2-methylimidazole of stirring and dissolving 3.28g makes 2-methylimidazole solution standby; Under stirring, to Co(NO 3 ) 2 Slowly pour 2-methylimidazole solution into the solution, let it stand for aging at room temperature for 24 hours, centrifuge the formed purple product, wash it with methanol three times, and dry it in an oven at 60°C for 12 hours.

[0068] (2) Preparation of cobalt / nitrogen-carbon nanomaterials derived from organic framework: In an argon atmosphere, the ZIF-67 precursor was heated to 900°C at 2°C / min, and maintained for 3h, and the resulting black powder product was placed in 0.5M sulfuric acid The ...

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Abstract

The invention relates to an organic metal framework derived cobalt / nitrogen carbon nano material as well as a preparation method and application thereof. The preparation method comprises the followingspecific steps: (1) stirring and dissolving Co(NO3)<2>.6H2O in methanol to prepare a Co(NO3)2 solution; stirring and dissolving 2-methylimidazole in methanol to prepare a 2-methylimidazole solution;pouring the 2-methylimidazole solution into the Co(NO3)2 solution, standing and aging the mixture at room temperature, centrifuging the mixture, and washing and drying a product to obtain ZIF-67; and(2) carrying out annealing treatment on the ZIF-67 obtained in the step (1), and carrying out acid pickling, water washing and drying to obtain the cobalt / nitrogen carbon nano material. Compared withthe prior art, the cobalt / nitrogen carbon material prepared by the method has the advantages of low metal dissolution, good reusability, a simple and convenient operation process, a wide pH application range and the like when being used for activating peroxydisulfate, and has wide application prospects in the field of treatment of degradation-resistant organic matter wastewater.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a cobalt / nitrogen carbon nanometer material derived from an organometallic framework and a preparation method and application thereof. Background technique [0002] In recent years, advanced oxidation technology based on persulfate (PS) activation reaction is becoming one of the most attention-grabbing methods for the removal of refractory organics. Compared with hydroxyl radicals, sulfate radicals produced by persulfate have higher redox potential (2.5-3.1V), longer half-life (≤30-40μs) and lower dependence on pH, so Persulfate has gradually become a new type of advanced oxidation oxidizing agent. Compared to other oxidants such as H 2 o 2 and O 3 etc. Persulfate has the advantages of high solubility, high redox potential, long retention time in the environment, environmental friendliness and wide pH range. PS can be activated by heating, ultraviolet light and catalysts. Among the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/22B01J27/24C02F1/28C02F1/00C02F101/36
CPCB01J20/226B01J27/24C02F1/00C02F1/285C02F2101/36C02F2209/06
Inventor 毛舜刘莹堵宁杰
Owner TONGJI UNIV
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