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a kind of coal 2 o 4 Nano powder, preparation method and application

A nano-powder and coal2o4 technology, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of cumbersome synthesis of cobalt blue pigments, etc., and achieve the effect of fewer types of equipment, high purity, and fewer types of raw materials

Active Publication Date: 2022-04-29
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cobalt blue pigment CoAl 2 o 4 The synthesis method is relatively cumbersome

Method used

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  • a kind of coal <sub>2</sub> o <sub>4</sub> Nano powder, preparation method and application
  • a kind of coal <sub>2</sub> o <sub>4</sub> Nano powder, preparation method and application
  • a kind of coal <sub>2</sub> o <sub>4</sub> Nano powder, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034](1) Disperse 1.5g of halloysite in 60mL of absolute ethanol, stir ultrasonically for 30min, then add 2.328g of Co(NO 3 ) 2 ·6H 2 0, obtain the suspension after ultrasonic stirring for 30min mixing;

[0035] (2) Weigh 6.56g of 2-methylimidazole and dissolve it in 60mL of absolute ethanol to obtain a solution. Slowly add 60mL of the solution to the 60mL suspension prepared in step (1), and after ultrasonic stirring for 30min, continue to Place and age for 24h to obtain a layered mixed solution;

[0036] (3) Suction filter the layered mixture to obtain a solid phase, rinse the solid phase with absolute ethanol and deionized water 4 times, dry it in vacuum at 60°C for 16 hours, grind to obtain a purple powder, take 0.3 g of the purple powder and place it in a tube Calcination was carried out at 900°C in a type furnace, the heating rate was 2°C / min, and the holding time was 2h, to obtain blue CoAl 2 o 4 Nano powder.

Embodiment 2

[0038] (1) Disperse 1.5g of halloysite in 60mL of absolute ethanol, stir ultrasonically for 30min, then add 2.328g of Co(NO 3 ) 2 ·6H 2 0, obtain the suspension after ultrasonic stirring for 30min mixing;

[0039] (2) Weigh 6.56g of 2-methylimidazole and dissolve it in 60mL of absolute ethanol to obtain a solution; slowly add 60mL of the solution to the 60mL suspension prepared in step (1), and after ultrasonic stirring for 30min, continue to Place and age for 24h to obtain a layered mixed solution;

[0040] (3) Suction filter the layered mixture to obtain a solid phase, wash the solid phase with absolute ethanol and deionized water 4 times, dry it in vacuum at 60°C for 15 hours, grind to obtain a purple powder, take 0.3 g of the purple powder and put it in a tube Calcined at 800°C in a type furnace, the heating rate was 2°C / min, and the holding time was 2h, to obtain blue CoAl 2 o 4 Nano powder;

[0041] The CoAl 2 o 4 XRD pattern of nano powder figure 1 As shown, th...

Embodiment 3

[0045] (1) Disperse 1.4g of halloysite in 60mL of absolute ethanol, stir ultrasonically for 30min, then add 2.328g of Co(NO 3 ) 2 ·6H 2 0, obtain the suspension after ultrasonic stirring for 30min mixing;

[0046] (2) Weigh 6.816g of 2-methylimidazole and dissolve it in 60mL of absolute ethanol to obtain a solution; slowly add 60mL of the solution to the 60mL suspension obtained in step (1), stir ultrasonically for 30min, and then continue to stand Aging for 22h to obtain a stratified mixed solution;

[0047] (3) Suction filter the layered mixture to obtain a solid phase, wash the solid phase with absolute ethanol and deionized water 4 times, dry it in vacuum at 60°C for 18 hours, grind to obtain a purple powder, take 0.3 g of the purple powder and place it in a tube Calcination was carried out at 900°C in a type furnace, the heating rate was 2°C / min, and the holding time was 2h, to obtain blue CoAl 2 o 4 Nano powder.

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Abstract

The invention discloses a CoAl 2 o 4 The preparation method of nanopowder, take halloysite as aluminum source, Co(NO 3 ) 2 ·6H 2 O and / or CoCl 2 ·6H 2 O is the cobalt source, and CoAl is prepared by loading the cobalt source on the halloysite nanotubes and calcining them at a controlled temperature 2 o 4 The nano powder has a simple preparation method, fewer types of raw materials, and is suitable for large-scale production. CoAl prepared by the above preparation method 2 o 4 The nanopowder has a characteristic blue color, high purity, and retains the nanotubular structure of halloysite, which can be used to adsorb or catalyze the degradation of dye molecules in wastewater. The dyes are methylene blue, rhodamine B or methyl orange At least one of, and CoAl 2 o 4 The nano-tubular structure of the nano-powder makes it have a large contact area with the dye wastewater, and the catalytic degradation rate of methyl orange can reach 100%. In addition, the CoAl prepared by the present invention 2 o 4 Nanopowders can be used as ceramic pigments.

Description

technical field [0001] The invention belongs to the technical field of inorganic powder materials, in particular to a CoAl 2 o 4 Nano powder, preparation method and application. Background technique [0002] Cobalt aluminate (CoAl 2 o 4 ) is an inorganic coloring agent with strong tinting strength and good anti-aging ability, generally called cobalt blue, and is often used as high-temperature resistant ceramic glaze. It has a typical cobalt-aluminum spinel structure and is widely used. In recent years, studies have shown that CoAl 2 o 4 Can be used for photocatalytic degradation of dyes, CO 2 Catalytic conversion, etc. (Mo, L.Y.; Zheng, X.M.; et al. A novelcatalyst Pt / CoAl 2 o 4 / Al 2 o 3 for combination CO 2 reforming and partial oxidation of CH 4 . Catal Lett 2002, 80(3-4), 165-169.). [0003] Currently, CoAl 2 o 4 The common preparation methods are mainly solid-phase calcination method and precipitation method in liquid-phase method, hydrothermal method,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02C01G51/00C02F1/72B01J20/02B01J20/30B01J20/28B01J23/75B01J35/02C09C1/40B82Y30/00B82Y40/00C02F101/30C02F101/34C02F101/36C02F101/38
CPCC01F7/02C01G51/00C02F1/725C02F1/722B01J20/0248B01J20/28014B01J23/75B01J35/0013B01J35/02C09C1/40B82Y30/00B82Y40/00C01P2002/72C01P2004/03C01P2004/13C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2101/40
Inventor 孙青赵景凤盛嘉伟张俭
Owner ZHEJIANG UNIV OF TECH
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