Preparation method of hexagonal-prism-shaped Sm(OH)3 nanocrystalline

A nanocrystal and hexagonal prism technology is applied in the field of preparation of nano-semiconductor materials, which can solve the problems of weak crystallinity and uneven product size distribution, and achieve the effects of strong crystallinity, controllable grain growth and strong feasibility.

Active Publication Date: 2014-01-01
盐城抱璞文化传媒有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0004] The currently reported method for preparing rare earth hydroxides is the uniform precipitation method [Xiangting Dong, Guangyan Hong. Preparation of Rare Earth Hydroxide and Oxide Nanoparticles by Precipitation Method [J], Journal of Materials Science and Technology, 2005, 21 (4) :555-558], the crystallinity of the product obtained by this method is relatively weak and the size distribution of the product is inhomogeneous

Method used

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  • Preparation method of hexagonal-prism-shaped Sm(OH)3 nanocrystalline
  • Preparation method of hexagonal-prism-shaped Sm(OH)3 nanocrystalline

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Embodiment 1

[0019] 1) Analytical pure Sm(NO 3 ) 3 ·6H 2 O was dissolved in 30mL distilled water to make Sm 3+ Solution A with a concentration of 0.025mol / L;

[0020] 2) Under magnetic stirring, use analytically pure diethylenetriamine to adjust the pH value of solution A to 9.0, and continue stirring for 1.5 hours to form a reaction precursor;

[0021] 3) Pour the reaction precursor liquid into the hydrothermal reaction kettle, the filling ratio is controlled at 60%, and the hydrothermal kettle is sealed, then put into the electric blast drying oven, and react at 120°C for 8 hours, and cool naturally after the reaction to room temperature, then open the hydrothermal kettle, and filter the suspension obtained in the hydrothermal kettle to obtain a solid product; the solid product is successively washed by centrifugation with distilled water and absolute ethanol, and the number of times of centrifugal washing is 4 to 6 times, and then The washed solid product was dried in an electric va...

Embodiment 2

[0023] 1) Analytical pure Sm(NO 3 ) 3 ·6H 2 O was dissolved in 33mL distilled water to form Sm 3+ Solution A with a concentration of 0.150mol / L;

[0024] 2) Under magnetic stirring, use analytically pure diethylenetriamine to adjust the pH value of solution A to 9.5, and continue stirring for 1 hour to form a reaction precursor;

[0025] 3) Pour the reaction precursor liquid into the hydrothermal reaction kettle, the filling ratio is controlled at 66%, and the hydrothermal kettle is sealed, then put into the electric blast drying oven, and react at 100°C for 12h, and cool naturally after the reaction to room temperature, then open the hydrothermal kettle, and filter the suspension obtained in the hydrothermal kettle to obtain a solid product; the solid product is successively washed by centrifugation with distilled water and absolute ethanol, and the number of times of centrifugal washing is 4 to 6 times, and then The washed solid product was placed in an electric vacuum o...

Embodiment 3

[0027] 1) Analytical pure Sm(NO 3 ) 3 ·6H 2 O was dissolved in 33mL distilled water to form Sm 3+ Solution A with a concentration of 0.055mol / L;

[0028] 2) Under magnetic stirring, use analytically pure diethylenetriamine to adjust the pH value of solution A to 9.7, and continue stirring for 1.5 hours to form a reaction precursor;

[0029] 3) Pour the reaction precursor liquid into the hydrothermal reaction kettle, the filling ratio is controlled at 66%, and the hydrothermal kettle is sealed, and then put into the electric blast drying oven, and react at 120°C for 24h, and naturally cool to At room temperature, open the hydrothermal kettle again, and filter the suspension obtained in the hydrothermal kettle to obtain a solid product; the solid product is sequentially washed with distilled water and absolute ethanol, and the number of centrifugal washing is 4 to 6 times, and then the washed The final solid product was placed in an electric vacuum oven and dried at 60°C for...

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Abstract

A preparation method of hexagonal-prism-shaped Sm(OH)3 nanocrystalline comprises the steps that a solution A with the Sm<3+> concentration being 0.010-0.150mol/L is prepared by dissolving Sm(No3)3*6H2O in distilled water; a reaction precursor solution is formed by adjusting the pH value of the solution A to 7.0-11.0 through diethylenetriamine; the reaction precursor solution is poured into a hydrothermal synthesis reactor, the hydrothermal synthesis reactor is put in an electrothermal blowing dry box after being sealed, a reaction is conducted for 6-24 hours at the temperature of 50-120 DEG C, and after the reaction is finished, the hydrothermal synthesis reactor is naturally cooled to the room temperature; products are centrifugally washed for 4-6 times through distilled water and absolute ethyl alcohol, the products are collected and dried for 2-4 hours at the temperature of 60-80 DEG C in a vacuum mode, and the hexagonal-prism-shaped Sm(OH)3 nanocrystalline is obtained. According to the preparation method, instruments and equipment are simple, control is easy, operation is convenient, energy consumption is low, safety is good, and the hexagonal-prism-shaped Sm(OH)3 nanocrystalline prepared in the method is high in purity, strong in crystallinity, uniform in morphology, good in dispersity and controllable in grain growth.

Description

technical field [0001] The invention relates to a preparation method of nano-semiconductor materials, in particular to a hexagonal columnar Sm(OH) 3 Methods of preparing nanocrystals. Background technique [0002] Sm(OH) 3 It is a white powder, insoluble in water, soluble in inorganic acid. Sm(OH) 3 As a typical rare earth metal hydroxide material, nanoscale Sm(OH) 3 It has the characteristics of both rare earth and nanometer materials, and has potential application value in many fields of functional materials such as high-efficiency light-emitting devices, magnetic materials, and catalytic materials. [0003] SM 2 o 3 It is a new generation of energy conversion materials, semiconductor materials and high-performance catalyst materials, nano Sm 2 o 3 It can be used in ceramic capacitors, preparing rare earth permanent magnet materials, etc. But because of the synthetic Sm 2 o 3 The reaction activation energy is higher, so Sm(OH) can be used 3 Nanocrystals as a pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y40/00
Inventor 黄剑锋王丹殷立雄曹丽云郝巍吴建鹏
Owner 盐城抱璞文化传媒有限公司
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