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A method for preparing sm(oh)3/cuo nanocomposites by microwave hydrothermal method

A technology of nanocomposite and microwave hydrothermal method, which is applied in the field of nano-semiconductor composite material preparation, can solve the problems of low visible light and solar energy utilization rate of only 1%, and achieve narrow particle size distribution, controllable crystal morphology and speed fast effect

Active Publication Date: 2016-03-30
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a wide bandgap semiconductor, Sm(OH) 3 The response to visible light is low, and only light below the spectrum of 390nm can be used, and the utilization rate of solar energy is only 1%.

Method used

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  • A method for preparing sm(oh)3/cuo nanocomposites by microwave hydrothermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) The analytically pure Sm(NO 3 ) 3 ·6H 2 O and Cu(NO 3 ) 2 ·3H 2 O was dissolved in 10 ml deionized water at a molar ratio of 1:0.2 to prepare Sm 3+ Solution A with a concentration of 0.1mol / L;

[0021] 2) Under magnetic stirring, use analytically pure sodium hydroxide to adjust the pH of solution A to 7, and continue stirring for 1 hour to form a reaction precursor;

[0022] 3) Pour the reaction precursor solution into a microwave hydrothermal reaction kettle with deionized water as a solvent, seal the kettle and put it into a microwave hydrothermal reaction instrument, perform a hydrothermal reaction at 100°C for 2 hours, and naturally cool to room temperature after the reaction;

[0023] 4) The product was washed by centrifugation with deionized water and absolute ethanol for 4 to 6 times in sequence, and dried in an electric vacuum oven at 60°C for 0.5h to obtain Sm(OH) 3 / CuO nanocomposites.

Embodiment 2

[0025] 1) The analytically pure Sm(NO 3 ) 3 ·6H 2 O and Cu(NO 3 ) 2 ·3H 2 O was dissolved in 10 ml deionized water at a molar ratio of 1:0.5 to prepare Sm 3+ Solution A with a concentration of 2mol / L;

[0026] 2) Under magnetic stirring, use analytically pure sodium hydroxide to adjust the pH of solution A to 9, and continue stirring for 1 hour to form a reaction precursor;

[0027] 3) Pour the reaction precursor solution into a microwave hydrothermal reaction kettle with deionized water as a solvent, seal the kettle and put it into a microwave hydrothermal reaction instrument, perform a hydrothermal reaction at 100°C for 2 hours, and naturally cool to room temperature after the reaction;

[0028] 4) The product was successively washed with deionized water and absolute ethanol for 4 to 6 times, and dried in an electric vacuum oven at 70°C for 1 hour to obtain Sm(OH) 3 / CuO nanocomposites.

Embodiment 3

[0030] 1) The analytically pure Sm(NO 3 ) 3 ·6H 2 O and Cu(NO 3 ) 2 ·3H 2 O was dissolved in 10 ml deionized water at a molar ratio of 1:0.8 to prepare Sm 3+ Solution A with a concentration of 0.5mol / L;

[0031] 2) Under magnetic stirring, use analytically pure sodium hydroxide to adjust the pH of solution A to 11, and continue stirring for 1.5 h to form a reaction precursor;

[0032] 3) Pour the reaction precursor solution into a microwave hydrothermal reaction kettle with deionized water as a solvent, seal the kettle and put it into a microwave hydrothermal reaction instrument, perform a hydrothermal reaction at 130°C for 1.5 hours, and naturally cool to room temperature after the reaction;

[0033] 4) The product was successively washed with deionized water and absolute ethanol for 4 to 6 times, and dried in an electric vacuum oven at 80°C for 1 hour to obtain Sm(OH) 3 / CuO nanocomposites.

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Abstract

The invention discloses a method for preparing a Sm(OH3)3 / CuO nano composite by a microwave-hydrothermal process, which comprises the following steps: dissolving analytically pure Sm(NO3)3.6H2O and Cu(NO3)2.3H2O in a mole ratio of 1:0.2-1:2 in deionized water to obtain a solution A: regulating the pH value of the solution A to 7-13 by using analytically pure sodium hydroxide, and continuing stirring for 1-2 hours to form a reaction precursor solution; pouring the reaction precursor solution into a hydrothermal kettle, sealing the kettle, putting in a microwave-hydrothermal reaction instrument (MDS-10), reacting at 100-200 DEG C for 1-2 hours, and after the reaction finishes, naturally cooling to room temperature; and carrying out centrifuge washing on the product sequentially with deionized water and anhydrous ethanol 4-6 times, and carrying out vacuum drying on the collected product at 60-80 DEG C for 0.5-2 hours, thereby obtaining the Sm(OH3)3 / CuO nano composite. The method has the advantages of accessible raw materials, low cost, simple technological equipment, low energy consumption and high speed.

Description

【Technical field】 [0001] The invention belongs to the field of preparation of nano-semiconductor composite materials, in particular to a method for preparing Sm(OH) 3 / CuO nanocomposite approach. 【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] As a wide bandgap semiconductor, Sm(OH) 3 The response to visible light is relatively low, and only light below the spectrum of 390nm can be used, and the utilization rate of solar energy is only 1%. 【Content of invention】 [0004] The object of the present invention is to provide a kind of adopting microwave hydrothermal method to prepare Sm(OH) ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G3/02C01F17/00B82Y30/00
Inventor 殷立雄王菲菲黄剑锋孔新刚张东东柴思敏韩鑫裴宇梁
Owner SHAANXI UNIV OF SCI & TECH
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