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A self-assembled wheat spike SMCO 3 Preparation methods of (oh)nanomaterials

A nano-material and wheat-ear-shaped technology, which is applied in the field of self-assembled wheat-ear-shaped SmCO3 nanomaterials, can solve the problems of cumbersome product post-treatment process, wide product particle size distribution, long reaction cycle, etc., and achieve shape control , strong crystallinity and short reaction time

Active Publication Date: 2017-03-01
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the crystallinity of the product obtained by the uniform precipitation method is relatively weak and the particle size distribution of the product is wide; the reaction period of the sol-gel method is too long, and the post-treatment process of the obtained product is relatively cumbersome

Method used

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  • A self-assembled wheat spike SMCO <sub>3</sub> Preparation methods of (oh)nanomaterials
  • A self-assembled wheat spike SMCO <sub>3</sub> Preparation methods of (oh)nanomaterials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) The analytically pure Sm(NO 3 ) 3 ·6H 2 O was dissolved in an appropriate amount of deionized water to prepare Sm 3+ Solution A with a concentration of 0.5mol / L;

[0026] 2) Add Na to solution A under magnetic stirring condition 2 CO 3 The solution adjusts its pH to 9 to obtain a reaction precursor;

[0027] 3) After fully stirring, place the reaction precursor solution in a 100mL polytetrafluoroethylene lining (filling rate is 50%), seal the hydrothermal reaction kettle and put it into a microwave hydrothermal reaction instrument (MDS-10 type ), react at 120°C for 2h, and naturally cool to room temperature after the reaction;

[0028] 4) The product was washed by centrifugation with deionized water and absolute ethanol for 4 to 6 times in sequence, and the collected product was vacuum-dried at 60°C for 2 hours to obtain the self-assembled wheat ear-shaped SmCO 3 (OH) nanomaterials.

Embodiment 2

[0030] 1) The analytically pure Sm(NO 3 ) 3 ·6H 2 O was dissolved in an appropriate amount of deionized water to prepare Sm 3+ Solution A with a concentration of 2mol / L;

[0031] 2) Add Na to solution A under magnetic stirring condition 2 CO 3 Adjust the pH of the solution to 11 to obtain a reaction precursor;

[0032] 3) After fully stirring, place the reaction precursor solution in a polytetrafluoroethylene liner with a specification of 100mL (filling rate is 40%), seal the hydrothermal reaction kettle and put it into a microwave hydrothermal reaction instrument (MDS-10 type ), react at 200°C for 1 hour, and cool to room temperature naturally after the reaction;

[0033] 4) The product was washed by centrifugation with deionized water and absolute ethanol for 4 to 6 times in sequence, and the product was collected and vacuum-dried at 80°C for 1 hour to obtain SmCO 3 (OH) nanomaterials.

Embodiment 3

[0035] 1) The analytically pure Sm(NO 3 ) 3 ·6H 2 O was dissolved in an appropriate amount of deionized water to prepare Sm 3+ Solution A with a concentration of 1mol / L;

[0036] 2) Add Na to solution A under magnetic stirring condition 2 CO 3 The pH of the solution is adjusted to 8 to obtain a reaction precursor;

[0037] 3) After fully stirring, place the reaction precursor solution in a 100mL polytetrafluoroethylene lining (filling rate is 35%), seal the hydrothermal reaction kettle and put it into a microwave hydrothermal reaction instrument (MDS-10 type ), react at 150°C for 1 hour, and cool to room temperature naturally after the reaction;

[0038] 4) The product was washed by centrifugation with deionized water and absolute ethanol for 4 to 6 times in sequence, and the product was collected and dried in vacuum at 80°C for 0.5h to obtain SmCO 3 (OH) nanomaterials.

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Abstract

The present invention discloses a preparation method of a self-assembly wheat-ear-like Sm2CO3 (OH) nanomaterial, the preparation method includes the following steps: 1) analytically pure Sm (NO3) 3. 6H2O is dissolved in deionized water to prepare a solution A with the Sm<3+ > concentration of 0.5-2mol / L; 2) an alkali solution is added into the solution A under magnetic stirring to adjust pH to 8 to 11; 3) after full stirring, the reaction precursor solution is placed in a Teflon liner, a hydrothermal reaction kettle is sealed, and placed in a microwave hydrothermal reaction device for reaction for 1-2h at 100-200 DEG C, after the completion of the reaction, the hydrothermal reaction kettle is naturally cooled to room temperature; and 4) the product is successively washed with deionized water and ethanol by centrifugation, and the product is collected and dried under vacuum to obtain the wheat-ear-like Sm2CO3 (OH) nanomaterial. The preparation method has the advantages of being short in reaction time, simple and efficient, low in cost, strong in feasibility, very economical, and practical and has a good prospect for industrialization.

Description

[0001] 【Technical field】 [0002] The invention relates to the field of nanomaterials, in particular to a self-assembled wheat spike-shaped SmCO 3 Preparation methods of (OH) nanomaterials. [0003] 【Background technique】 [0004] SmCO 3 (OH) is a white powder, which is insoluble in water but easily soluble in inorganic acids, and it has rarely been reported so far. SM 2 o 3 As a wide bandgap rare earth metal oxide semiconductor material, it has broad application prospects in the fields of microelectronics and optoelectronics. SM 2 o 3 The activation energy of the synthesis is high, and it is difficult to directly obtain the target product in one step by the liquid phase synthesis method, but the intermediate product SmCO 3 (OH), as a typical rare earth metal compound, it also has excellent and unique optical, electrical, magnetic and chemical properties, and it also has excellent performance in photocatalytic degradation of organic matter. [0005] The currently report...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/00B82Y40/00B82Y30/00
Inventor 殷立雄张浩张东东黄剑锋孔新刚王菲菲柴思敏
Owner SHAANXI UNIV OF SCI & TECH