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Zinc oxide coated calcium carbonate nano-material and preparation method thereof

A technology of nanomaterials and core-shell nanomaterials, applied in the field of new inorganic non-metallic materials, can solve problems such as inability to meet the needs of zinc oxide activity, environmental pollution, large particle size, etc., and achieve good coating effect and good coating effect , the effect of simple method

Active Publication Date: 2020-09-01
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the CaCO prepared in the prior art 3 The particle size of the @ZnO core-shell material is relatively large, which belongs to micron materials, and its activity is poor. It cannot meet the needs of zinc oxide activity in the actual production process, and a large amount of ammonia water and other substances are used in the preparation process, which is likely to cause environmental pollution and other problems. The invention provides a nanomaterial method for preparing zinc oxide-coated calcium carbonate

Method used

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  • Zinc oxide coated calcium carbonate nano-material and preparation method thereof
  • Zinc oxide coated calcium carbonate nano-material and preparation method thereof
  • Zinc oxide coated calcium carbonate nano-material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Disperse 50g of calcium carbonate powder with a particle size of 140nm in 50mL of water and stir in a 100mL round bottom flask, dissolve 1.0mol of zinc nitrate and 3.0mol of urea in the above solution respectively, and react at 100°C , the reaction time is 12h, and CaCO can be obtained after the reaction 3 @Zn(OH) 2 Suspensions of nanomaterials;

[0033] (2) Let the suspension obtained in step (1) stand for 2 hours, vacuum filter it with a Buchner funnel, wash it repeatedly with clean water 3 times, and use 500 mL of clean water each time, and dry the obtained nanomaterials in an oven at 100 ° C for 5 hours , to obtain dry CaCO 3 @Zn(OH) 2 ;

[0034] (3) Then the dried CaCO 3 @Zn(OH) 2 The precursor powder was transferred to a muffle furnace for calcination at 350°C, the heating rate was 2°C / min, and the temperature was kept for 2h to obtain zinc oxide-coated calcium carbonate nanomaterials.

[0035] figure 1 Is the CaCO prepared in this example 3 The scann...

Embodiment 2

[0037] (1) Disperse 50g of calcium carbonate powder with a particle size of 200nm in 50mL of water and stir in a 100mL round bottom flask, dissolve 1.5mol of zinc nitrate and 4.0mol of urea in the above solution, and react at 120°C , the reaction time is 20h, and CaCO can be obtained after the reaction 3 @Zn(OH) 2 Suspensions of nanomaterials;

[0038] (2) Let the suspension obtained in step (1) stand for 2 hours, vacuum filter it with a Buchner funnel, wash it repeatedly with clean water 3 times, and use 500 mL of clean water each time, and dry the obtained nanomaterials in an oven at 100 ° C for 5 hours , to obtain dry CaCO 3 @Zn(OH) 2 ;

[0039] (3) Then the dried CaCO 3 @Zn(OH) 2The precursor powder was transferred to a muffle furnace for calcination at 300°C, the heating rate was 5°C / min, and the temperature was kept for 3h to obtain zinc oxide-coated calcium carbonate nanomaterials.

[0040] figure 2 Is the CaCO prepared in this example 3 The scanning electron ...

Embodiment 3

[0042] (1) Disperse 50g of calcium carbonate powder with a particle size of 80nm in 50mL of water and stir in a 100mL round bottom flask, dissolve 0.5mol of zinc nitrate and 2.0mol of urea in the above solution, and react at 90°C , the reaction time is 24h, and CaCO can be obtained after the reaction 3 @Zn(OH) 2 Suspensions of nanomaterials;

[0043] (2) Let the suspension obtained in step (1) stand for 2 hours, vacuum filter it with a Buchner funnel, wash it repeatedly with clean water 3 times, and use 500 mL of clean water each time, and dry the obtained nanomaterials in an oven at 100 ° C for 5 hours , to obtain dry CaCO 3 @Zn(OH) 2 ;

[0044] (3) Then the dried CaCO 3 @Zn(OH) 2 The precursor powder was transferred to a muffle furnace for calcination at 300°C, the heating rate was 1°C / min, and the temperature was kept for 2 hours to obtain nanomaterials coated with zinc oxide calcium carbonate. Zinc oxide can completely coat calcium carbonate, but the particle agglome...

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Abstract

The invention discloses a zinc oxide coated calcium carbonate nano-material and a preparation method thereof, and belongs to the technical field of novel inorganic non-metallic materials. The preparation of a calcium carbonate@zinc oxide core-shell functional nano-powder material is researched by taking calcium carbonate nano-particles as a core, and a method for preparing CaCO3@ZnO core-shell structure composite nano-particles by combining a hydrothermal method with a heat treatment method is dislcosed. The surface of the CaCO3@ZnO core@shell structure composite nano-particle calcium carbonate prepared by the method is completely covered with zinc oxide, the zinc oxide is in a wire sheet shape, and the coating effect is good. Besides, the preparation method provided by the invention is simple, is suitable for large-scale production, and can effectively reduce the use amount of zinc resources.

Description

Technical field [0001] The invention relates to a zinc oxide-coated calcium carbonate nanomaterial and a preparation method thereof, and belongs to the technical field of new inorganic non-metallic materials. Background technique [0002] Zinc oxide (ZnO) is a commonly used chemical additive that has been widely used in rubber, plastics, paints, ointments, adhesives, food, batteries, flame retardants, papermaking, printing and dyeing and other industries. Zinc resources are non-renewable resources. In recent years, my country's zinc resources have been relatively scarce and it has become a pure zinc importer. However, violent fluctuations in international zinc prices have seriously affected the normal development of the zinc oxide industry. At present, more than 50% of domestic zinc oxide is used in the rubber industry to give full play to the role of vulcanization promotion and improve the function of rubber. However, the ordinary zinc oxide used by many high-tech enterpris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02C01F11/18C09C1/04C09C3/06B01J13/20
CPCB01J13/20C01F11/185C01G9/02C01P2004/03C01P2004/04C01P2004/62C01P2004/80C09C1/043C09C3/06
Inventor 晏晓东胡青桃顾志国廖劲松赵小英
Owner JIANGNAN UNIV
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