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Preparation method and product of CaTi2O4(OH)4 diamond nanosheet with lamellar structure

A layered structure and nanosheet technology, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of poor controllability, unfavorable application, irregular shape and size of nanolayers, etc., and achieve low cost, Easy to enlarge production, the effect of uniform size

Inactive Publication Date: 2015-04-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The controllability of this preparation method is poor, and the prepared CaTi 2 o 4 (OH) 4 The shape and size of the nanolayer are very irregular, which is not conducive to its further application

Method used

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  • Preparation method and product of CaTi2O4(OH)4 diamond nanosheet with lamellar structure
  • Preparation method and product of CaTi2O4(OH)4 diamond nanosheet with lamellar structure

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Embodiment 1

[0027] 1) Dissolving 4 mmol tetrabutyl titanate in 20 ml ethylene glycol methyl ether to obtain a ethylene glycol methyl ether solution with a tetrabutyl titanate concentration of 0.2 mol / L;

[0028] 2) Add 2.5 ml of ammonia solution with a mass concentration of 30% to the tetrabutyl titanate ethylene glycol methyl ether solution prepared in 1), stir gently with a glass rod for 2 times, let stand for 2 minutes to precipitate, filter, and use deionized water Wash 3 times to get titanium oxyhydroxide precipitation;

[0029] 3) Precipitate the titanium oxyhydroxide obtained in step 2), add calcium nitrate crystals and tetramethylammonium hydroxide crystals into the inner tank of the reactor in sequence, and adjust the volume of the material to 4 / 5 of the reactor with deionized water, and stir For 1 hour, the calcium-titanium ratio was 1.1:1, the molar concentration of tetramethylammonium hydroxide was 0.05mol / L, and the molar concentration of calcium nitrate was 0.11mol / L. The vo...

Embodiment 2

[0033] 1) Dissolve 6mmoL tetrabutyl titanate in 12ml ethylene glycol methyl ether to obtain an ethylene glycol methyl ether solution with a tetrabutyl titanate concentration of 0.5mol / L;

[0034] 2) Add 3 ml of ammonia solution with a mass concentration of 30% to the tetrabutyl titanate ethylene glycol methyl ether solution prepared in 1), stir gently with a glass rod for 2 times, let stand for 2 minutes to precipitate, filter, and wash with deionized water 4 times, the oxyhydroxide precipitation of titanium was obtained;

[0035] 3) Precipitating the titanium oxyhydroxide obtained in step 2), adding calcium nitrate crystals and tetramethylammonium hydroxide crystals to the inner tank of the reactor in sequence, and adjusting the volume of the material to 2 / 3 of the reactor with deionized water, Stir for 3 hours, the calcium-titanium ratio is 1.1:1, the molar concentration of tetramethylammonium hydroxide is 0.1mol / L, and the molar concentration of calcium nitrate is 0.165mol / ...

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Abstract

The invention discloses a preparation method of a CaTi2O4(OH)4 diamond nanosheet with a lamellar structure. The method comprises the following steps: mixing tetrabutyl titanate with ethylene glycol monomethyl ether or ethyl alcohol, so as to obtain a 0.2-0.5M tetrabutyl titanate solution; adding an ammonia-water solution to adjust the pH value to 10-11, standing to obtain titanium oxyhydroxide sediments; mixing the titanium oxyhydroxide sediments, calcium nitrate and tetramethylammonium hydroxide with water, and stirring evenly, so as to obtain precursor slurry; and carrying out hydrothermal reaction, and then processing, so as to obtain the CaTi2O4(OH)4 diamond nanosheet with the lamellar structure, wherein the concentration of tetramethylammonium hydroxide in the precursor slurry is 0.05-0.1M; and the concentration of calcium nitrate is 0.1-0.2M. Through accurate regulation and control on the reaction condition, the Ti2O4(OH)4 diamond nanosheet with the lamellar structure is obtained by one-step hydrothermal reaction; and the preparation process is simple and easy to control.

Description

technical field [0001] The invention relates to the field of preparation of inorganic non-metallic materials, in particular to a layered structure CaTi 2 o 4 (OH) 4 Preparation method and product of rhombic nanosheets. Background technique [0002] Calcium titanium oxide is a large family with a large number and rich types. Therefore, calcium titanium oxide also presents many novel properties. CaTi 2 o 4 (OH) 4 It is a special perovskite oxide composed of calcium, titanium and oxygen elements. It was discovered decades ago, but because its crystal structure is still unknown, it is called Kassite structure, similar to The hydrotalcite structure is composed of calcium-oxygen octahedron and titanium-oxygen octahedron main laminates and interlayer OH - Compounds assembled through non-covalent interactions. [0003] Currently, CaTi 2 o 4 (OH) 4 The preparation mainly includes traditional solid phase reaction method, wet chemical method, template method, gas phase method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00B82Y30/00B82Y40/00
Inventor 徐刚杨永荣白惠文邓世琪沈鸽韩高荣
Owner ZHEJIANG UNIV