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Preparation method for carbon-nitrogen co-doped tricobalt tetroxide

A technology of cobalt tetroxide and co-doping, which is applied in chemical instruments and methods, cobalt oxide/cobalt hydroxide, and other chemical processes, etc., can solve the problems of uncontrollable doping amount, unachievable effect, and uneven appearance of products. , to achieve fast and efficient adsorption effect, improve adsorption capacity, and the effect of product without impurity phase

Active Publication Date: 2019-04-23
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the process of carbon and nitrogen co-doped metal oxides is to mix urea, glucose, etc. as carbon sources and metal salts, and then perform high-temperature calcination to obtain the doped target product, or use ion implantation and doping to obtain the doping amount of the product. Uncontrollable, uneven shape and high process cost, not good effect, difficult to promote

Method used

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  • Preparation method for carbon-nitrogen co-doped tricobalt tetroxide
  • Preparation method for carbon-nitrogen co-doped tricobalt tetroxide
  • Preparation method for carbon-nitrogen co-doped tricobalt tetroxide

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Experimental program
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Effect test

Embodiment 1

[0032] 1. Weigh raw material samples, specifically 2 parts of organic ligand trimesic acid, 1 part of cobalt acetate, and 0.5 part of alkaline regulator sodium hydroxide, and dissolve them in 25 mL of water.

[0033] 2. After magnetic stirring, place in a 50 mL stainless steel reaction kettle lined with polytetrafluoroethylene, seal the reaction kettle, and carry out a 72-hour heat preservation process at a temperature of 180 ° C, then cool naturally, and the precursor Filtered out, washed several times with ethanol and distilled water, and dried to obtain the metal organic complex precursor.

[0034] 3. The metal organic complex precursor is calcined under vacuum conditions to obtain the target product. The vacuum degree of the vacuum quartz tube is 3 hPa, at 5°C min -1 The heating rate starts from room temperature and heats at a constant temperature for one hour after reaching the target temperature of 700°C. The product is cooled with the furnace to obtain carbon-nitrogen...

Embodiment 2

[0038] 1. Weigh raw material samples, specifically 1.5 parts of trimesic acid, 0.5 parts of 2,2'-bipyridine organic ligand, 1 part of cobalt acetate, and 0.5 parts of alkaline regulator sodium hydroxide, dissolved in 25 mL of water .

[0039] 2. After magnetic stirring, place it in a 50 mL stainless steel reaction kettle lined with polytetrafluoroethylene, seal the reaction kettle, and carry out a 48-hour heat preservation process at a temperature of 150 ° C, then cool naturally, and the precursor Filtered out, washed several times with ethanol and distilled water, and dried to obtain the metal organic complex precursor.

[0040] 3. The metal organic complex precursor is calcined under vacuum conditions to obtain the target product. First vacuumize the vacuum quartz tube to a degree of 3 hPa, at 5°C min -1 The heating rate starts from room temperature and heats at a constant temperature for one hour after reaching the target temperature of 700°C. The product is cooled with ...

Embodiment 3

[0044] 1. Weigh raw material samples, specifically 1.7 parts of trimesic acid, 0.3 parts of 2,2'-bipyridine organic ligand, 1 part of cobalt acetate, 0.5 parts of alkaline regulator sodium hydroxide, dissolved in 25 mL of in the water.

[0045] 2. After magnetic stirring, place in a 50 mL stainless steel reaction kettle lined with polytetrafluoroethylene, seal the reaction kettle, and carry out a 72-hour heat preservation process at a temperature of 180 ° C, then cool naturally, and the precursor Filtered out, washed several times with ethanol and distilled water, and dried to obtain the metal organic complex precursor.

[0046] 3. The metal organic complex precursor is calcined under vacuum conditions to obtain the target product. First vacuumize the vacuum quartz tube at a degree of 5 hPa, at 5°C min -1 The heating rate starts from room temperature and heats at a constant temperature for one hour after reaching the target temperature of 700°C. The product is cooled with t...

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Abstract

The invention belongs to the production field of engineering material, particularly relates to a method for preparing carbon-nitrogen co-doped tricobalt tetroxide by vacuum calcination of a metal organic complex precursor, wherein a metal organic framework material Co-BTC is synthesized as a precursor by hydrothermal method; and a target product carbon-nitrogen co-doped tricobalt tetroxide is obtained by the high temperature treatment of the precursor under vacuum conditions. The preparation method of the precursor includes the following steps that organic ligands, cobalt salts and alkaline regulators are dispersed in aqueous solution, placed in a reactor after being magnetically stirred, then cooled by heating and insulation treatment, and the precursor is obtained after being filtered out, washed and dried. The target product has the characteristics of controllable doping amount, uniform morphology, high product purity, strong microwave absorption and adsorption performance of organic dyes.

Description

technical field [0001] The invention belongs to the field of functional material production, and in particular relates to a method for preparing carbon-nitrogen co-doped tricobalt tetroxide by means of vacuum calcining metal organic complex precursors. Background technique [0002] Cobalt tetroxide is a functional material with special structure and properties, and has a wide range of applications in the fields of catalysis, energy, and microwave absorption. Because it has the weakest M-O bond, it shows excellent activity in many reactions. At present, it is widely used in supercapacitors, hard alloys, pressure-sensitive ceramics, inorganic pigments, catalysts and other fields. In some reactions, the activity of tricobalt tetroxide is even higher than that of noble metal platinum and palladium catalysts, and it has a good application prospect. In recent years, cobalt tetroxide has been explored to study various morphologies because of the above advantages. In the existing r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C01G51/04C02F1/28C09K3/00C02F101/30
CPCB01J20/226C09K3/00C01G51/04C02F1/285C02F2101/308
Inventor 史发年白绎炆史桂梅田波徐舸
Owner SHENYANG POLYTECHNIC UNIV
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