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Preparation method of porous FexCo3-xO4 nanocage, nanocage and application thereof

A nanocage and preparation process technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problem of catalyst deactivation and other problems, and achieve high activity, high specific surface area, and simple and easy preparation scheme

Inactive Publication Date: 2017-04-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The small-particle nanocatalysts prepared by conventional methods are prone to catalyst aggregation and catalyst deactivation during the catalytic reaction process.

Method used

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  • Preparation method of porous FexCo3-xO4 nanocage, nanocage and application thereof
  • Preparation method of porous FexCo3-xO4 nanocage, nanocage and application thereof
  • Preparation method of porous FexCo3-xO4 nanocage, nanocage and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 0.0332g K 4 [Fe(CN) 6 ] was dissolved in 10ml of deionized water and stirred uniformly to obtain solution A, mixed and dissolved in 0.0262g of cobalt nitrate and 0.0179g of ferric chloride in 10ml of deionized water to obtain solution B, and 0.6g of PVP was added to solution B and stirred evenly. Solution A was slowly added dropwise to B and continued to stir for 30 min, aged at room temperature for 20 h. After centrifugation for 5min (8000r / min), the water-ethanol mixture (v / v=50 / 50) was washed three times, and dried at 60°C for 20h to obtain Fe 0.5 co 0.5 -Co PBAs nanosphere precursor. Fe can be obtained by calcining the above precursor at 500°C for 1 hour 0.8 co 2.2 o 4 nanocage. For the resulting Fe 0.8 co 2.2 o 4 Nanocages for Characterization: figure 1 is Fe 0.8 co 2.2 o 4 The TEM (transmission electron microscope) photo of the nanocage, it can be seen from the figure that the prepared nanocage is evenly dispersed, has a regular shape and is porous, ...

Embodiment 2

[0026] 0.0332g K 4 [Fe(CN) 6 ] was dissolved in 10ml of deionized water and stirred uniformly to obtain solution A, mixed and dissolved in 10ml of deionized water with 0.0315g of cobalt nitrate and 0.0144g of ferric chloride to obtain solution B, and 0.6g of PVP was added to solution B and stirred evenly. Solution A was slowly added dropwise to B and continued to stir for 30 min, aged at room temperature for 20 h. Separated for 5min (8000r / min), washed three times with water-ethanol mixture (v / v=50 / 50), dried at 60°C for 20h to obtain Fe 0.4 co 0.6 -Co PBAs nanosphere precursor. Fe can be obtained by calcining the above precursor at 500°C for 1 hour 0.7 co 2.3 o 4 nanocage.

Embodiment 3

[0028] 0.0332g K 4 [Fe(CN) 6 ] was dissolved in 10ml deionized water and stirred uniformly to obtain solution A, 0.0367g cobalt nitrate and 0.0108g ferric chloride were mixed and dissolved in 10ml deionized water to obtain solution B, and 0.6g PVP was added to solution B and stirred evenly. Solution A was slowly added dropwise to B and continued to stir for 30 min, aged at room temperature for 20 h. Centrifuge for 5min (8000r / min), wash with water-ethanol mixture (v / v=50 / 50) three times, dry at 60°C for 20h to obtain Fe 0.3 co 0.7 -Co PBAs nanosphere precursor. Fe can be obtained by calcining the above precursor at 500°C for 1 hour 0.5 co 2.5 o 4 nanocage.

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Abstract

The invention provides a preparation method of a porous FexCo3-xO4 nanocage, the nanocage and application thereof. In a PVP solution, the morphology of Co-Co PBAs can be effectively modulated by doping iron ions into a precursor solution for preparing cobalt hexacyanocobaltate(III) (Co-Co PBAs). The porous FexCo3-xO4 nanocage can be prepared by calcining the prepared doped FeyCo1-y-Co PBAs, wherein x is equal to 0-1 and the size of the nanocage is 50-300nm. The difference between the FexCo3-xO4 nanocage and the same kind of materials previously reported in the literature lies in that the cobalt content of the doped transitionmetal-oxide nanocage prepared by the method is adjustable and the morphology and size of the nanocage are adjustable. The nanocage can be used as a catalyst of a Fenton reaction and a Fenton-like reaction. By activating PMS, PS or H2O2, active free radical species can be produced for degrading organic pollutants in wastewater.

Description

technical field [0001] The present invention relates to the use of a porous Fe x co 3-x o 4 Preparation method of nanocages and their application in catalytic degradation of organic pollutants in Fenton reaction. Background technique [0002] In recent years, doped transition metal oxides have been widely used in battery electrode reaction, photocatalysis, Fenton reaction, magnetic materials and other fields. There are also many methods for preparing doped transition metal oxides, including sol-gel method, co-precipitation method and hydrothermal method. However, the specific surface area of ​​the prepared nanomaterials is usually low. However, most of the catalytic reactions occur on the surface of the catalyst. Therefore, the preparation of transition metal nanocatalysts with large specific surface area is still a challenge. With the deepening of people's understanding of nanocatalysts, the morphology of catalysts will undoubtedly have an important impact on its activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J35/10B82Y30/00C02F1/72C02F1/58H01M4/90
CPCY02E60/50
Inventor 李旭宁王军虎
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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