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Method for preparing cobalt tetroxide nanosheets by mof-co and biological template double confinement

A technology of cobalt trioxide nanometer and organic matter, which is applied in chemical instruments and methods, cobalt oxide/cobalt hydroxide, nanotechnology, etc., to achieve the effects of abundant quantity, enhanced capacity and excellent catalytic performance

Active Publication Date: 2021-06-22
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still much room for improvement in the activation performance of cobalt tetroxide on PMS, therefore, further rational design and synthesis of highly active cobalt oxides are still an urgent problem to be solved.
However, there is no relevant research report on obtaining cobalt tetroxide with high activation ability to PMS by using cobalt-organic framework compound and biological template as a dual template.

Method used

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  • Method for preparing cobalt tetroxide nanosheets by mof-co and biological template double confinement
  • Method for preparing cobalt tetroxide nanosheets by mof-co and biological template double confinement
  • Method for preparing cobalt tetroxide nanosheets by mof-co and biological template double confinement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Get 3mmol cobalt nitrate hexahydrate (99.0%), and the methanol-ethanol mixed solution that volume ratio is 1: 1, by proportioning, cobalt nitrate hydrate: methanol-ethanol mixed solution=3: 20, unit mmol: mL, The two are mixed evenly by magnetic stirring, wherein the stirring speed is 800r / min, and the stirring time is 8min, to obtain A solution;

[0049] (2) Get 12mmol of 1,2-dimethylimidazole (99.9%), and add a volume ratio of 1:1 methanol-ethanol mixed solution, according to the proportion, 1,2-dimethylimidazole:methanol-ethanol mixed solution= 12:20, unit mmol:mL, mix uniformly under magnetic stirring, stirring speed is 1000r / min, stirring time is 5min, to form B solution;

[0050] Pour the A solution into the B solution immediately, mix the two evenly under magnetic stirring, the stirring speed is 1000r / min, and the stirring time is 60min to obtain the cobalt-metal organic framework compound precursor solution, which is denoted as C solution;

[0051] (3) Corn...

Embodiment 2

[0060] (1) Get 3mmol cobalt nitrate hexahydrate (99.0%), and the methanol-ethanol mixed solution that volume ratio is 1: 1, by proportioning, cobalt nitrate hydrate: methanol-ethanol mixed solution=3: 20, unit mmol: mL, The two are mixed evenly by magnetic stirring, wherein the stirring speed is 800r / min, and the stirring time is 8min, to obtain A solution;

[0061](2) Get 12mmol of 1,2-dimethylimidazole (99.9%), and add a volume ratio of 1:1 methanol-ethanol mixed solution, according to the proportion, 1,2-dimethylimidazole:methanol-ethanol mixed solution= 12:20, unit mmol:mL, mix uniformly under magnetic stirring, stirring speed is 1000r / min, stirring time is 5min, to form B solution;

[0062] Pour the A solution into the B solution immediately, mix the two evenly under magnetic stirring, the stirring speed is 1000r / min, and the stirring time is 60min to obtain the cobalt-metal organic framework compound precursor solution, which is denoted as C solution;

[0063] (3) Corn ...

Embodiment 3

[0068] (1) Get 3mmol cobalt nitrate hexahydrate (99.0%), and the methanol-ethanol mixed solution that volume ratio is 1: 1, by proportioning, cobalt nitrate hydrate: methanol-ethanol mixed solution=3: 20, unit mmol: mL, The two are mixed evenly by magnetic stirring, wherein the stirring speed is 800r / min, and the stirring time is 8min, to obtain A solution;

[0069] (2) Get 12mmol of 1,2-dimethylimidazole (99.9%), and add a volume ratio of 1:1 methanol-ethanol mixed solution, according to the proportion, 1,2-dimethylimidazole:methanol-ethanol mixed solution= 12:20, unit mmol:mL, mix uniformly under magnetic stirring, stirring speed is 1000r / min, stirring time is 5min, to form B solution;

[0070] Pour the A solution into the B solution immediately, mix the two evenly under magnetic stirring, the stirring speed is 1000r / min, and the stirring time is 60min to obtain the cobalt-metal organic framework compound precursor solution, which is denoted as C solution;

[0071] (3) Full...

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Abstract

The method for preparing cobalt tetroxide nanosheets by MOF-Co and biological template double confinement of the present invention uses cobalt-organic framework compound and peeled straw / leaves / petals as double templates, heat treatment in air atmosphere, and cobalt-metal organic The corn stalk of the skeleton compound is calcined at a high temperature in a certain atmosphere to finally obtain the tricobalt tetroxide catalyst. In this preparation method, due to the derivation of cobalt-organic framework compounds and the common confinement of biological templates, the prepared cobalt tetroxide exhibits a hierarchical nanosheet structure composed of 3-15nm particles, and the cobalt catalytic active sites are evenly distributed on the entire nanosheet, and The cobalt active sites in the catalyst per unit mass are abundant and evenly distributed. By activating PMS to degrade oxytetracycline, it is proved that the obtained cobalt tetraoxide nanosheet catalyst has more excellent catalytic performance and physical and chemical stability.

Description

Technical field: [0001] The invention belongs to the technical field of environmental catalytic nanomaterials and wastewater advanced oxidation, and in particular relates to a method for preparing cobalt trioxide nanosheets with dual confinement of MOF-Co and biological templates. Background technique: [0002] In recent decades, the sulfate radical (SO 4 ·- )-based advanced oxidation process (SR-AOPS) is one of the effective treatment methods for the removal of refractory organic pollutants, because of its redox potential (2.5-3.1V), long life of active radicals (30-40μs) and selective Good sex and received widespread attention. Among them, permonosulfate (PMS) produces SO 4 ·- One of the most effective oxidizing agents. So far, there are various methods for activating PMSs, such as heat treatment, ultraviolet irradiation, ultrasound, microwave irradiation, and transition metal oxides. Among them, the transition metal oxide activation method is considered to be the mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/04B82Y40/00B01J23/75B01J37/08C02F1/72C02F101/30
CPCC01G51/04B82Y40/00B01J23/75B01J37/086C02F1/725C01P2004/24C01P2004/50C01P2004/64C01P2006/12C01P2006/16C02F2101/30B01J35/23
Inventor 王敏金重月李志林
Owner NORTHEASTERN UNIV LIAONING
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