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A two-step method for preparing ago/sm(oh) 3 /zno nanocomposite approach

A nanocomposite, step-by-step technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as low visible light and solar energy utilization rate of only 1% , to achieve the effect of low reaction cost, controllable morphology and high purity

Active Publication Date: 2017-08-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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 two-step method for preparing ago/sm(oh) <sub>3</sub> /zno nanocomposite approach
  • A two-step method for preparing ago/sm(oh) <sub>3</sub> /zno nanocomposite approach
  • A two-step method for preparing ago/sm(oh) <sub>3</sub> /zno nanocomposite approach

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) The analytically pure Sm(NO 3 ) 3 ·6H 2 O was dissolved in an appropriate amount of deionized water to prepare Sm 3+ Concentration is solution A of 2mol / L; Analytical pure Zn(NO 3 ) 2 ·3H 2 O was dissolved in an appropriate amount of deionized water to prepare Zn 2+ Solution B with a concentration of 0.5mol / L;

[0034] 2) Mix solutions A and B at a volume ratio of 10:1 and adjust the pH to 9 with ammonia solution, and continue stirring to form a reaction precursor evenly;

[0035] 3) Pour the reaction precursor solution into a homogeneous hydrothermal reactor with a filling ratio of 40%; after sealing the reactor, react in a homogeneous reactor at 200°C for 12 hours, and cool to room temperature naturally after the reaction;

[0036] 4) Wash the product by centrifugation for 4 to 6 times with deionized water and absolute ethanol in sequence, collect the product and dry it in vacuum at 70°C for 1 hour to obtain Sm(OH) 3 / ZnO precursor;

[0037] 5) The analyti...

Embodiment 2

[0039] 1) The analytically pure Sm(NO 3 ) 3 ·6H 2 O was dissolved in an appropriate amount of deionized water to prepare Sm 3+ Concentration is the solution A of 0.5mol / L; Analytical pure Zn(NO 3 ) 2 ·3H 2 O was dissolved in an appropriate amount of deionized water to prepare Zn 2+ Solution B with a concentration of 1mol / L;

[0040] 2) Mix solutions A and B at a volume ratio of 12:1 and adjust the pH to 10 with ammonia solution, and continue stirring to form a reaction precursor;

[0041] 3) Pour the reaction precursor solution into a homogeneous hydrothermal reaction kettle, seal the kettle and put it in a homogeneous reactor, react at 180°C for 48 hours, and cool it down to room temperature naturally after the reaction;

[0042] 4) Wash the product by centrifugation with deionized water and absolute ethanol for 4 to 6 times in sequence, collect the product and dry it in vacuum at 80°C for 0.5h to obtain Sm(OH) 3 / ZnO precursor;

[0043] 5) The analytically pure Sm(O...

Embodiment 3

[0045] 1) The analytically pure Sm(NO 3) 3 ·6H 2 O was dissolved in an appropriate amount of deionized water to prepare Sm 3+ Concentration is solution A of 2mol / L; Analytical pure Zn(NO 3 ) 2 ·3H 2 O was dissolved in an appropriate amount of deionized water to prepare Zn 2+ Solution B with a concentration of 0.5mol / L;

[0046] 2) Mix solutions A and B at a volume ratio of 20:1 and adjust the pH to 12 with ammonia solution, and continue stirring to form a reaction precursor;

[0047] 3) Pour the reaction precursor solution into a homogeneous hydrothermal reactor with a filling ratio of 50%; after sealing the reactor, react in a homogeneous reactor at 150°C for 20 hours, and cool to room temperature naturally after the reaction;

[0048] 4) Wash the product by centrifugation for 4 to 6 times with deionized water and absolute ethanol in sequence, collect the product and dry it in vacuum at 80°C for 2 hours to obtain Sm(OH) 3 / ZnO precursor;

[0049] 5) The analytically ...

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Abstract

The invention discloses a two-step method for preparing AgO / Sm(OH) 3 / ZnO nanocomposite approach: formulation of Sm 3+ Solution A with a concentration of 0.5-2mol / L; prepare Zn 2+ Solution B with a concentration of 0.5-2mol / L; Mix solutions A and B and adjust the pH to 9-12 with ammonia solution to form a reaction precursor; react the precursor in a homogeneous phase, and naturally cool to room temperature after the reaction; wash Collect the product and dry it under vacuum at 60-80°C for 0.5-2 hours to obtain Sm(OH) 3 / ZnO precursor; disperse the precursor in ethanol solution of silver nitrate, heat in a water bath at 60-80°C for 1-3 hours, cool to room temperature and then centrifugally wash and dry the production area to obtain AgO / Sm(OH) 3 / ZnO nanocomposites. The reaction medium of the invention is an aqueous solution, which has high safety, strong feasibility, low requirements on process equipment and simple operation.

Description

[0001] 【Technical field】 [0002] The invention relates to the field of preparation of nano-semiconductor composite materials, in particular to a two-step method for preparing AgO / Sm(OH) 3 / ZnO nanocomposite approach. [0003] 【Background technique】 [0004] 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. 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%. [0005] 【Content of invention】 [0006] The object of the present invention is to provide a kind of adopting two-step method to pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/66
Inventor 殷立雄张东东黄剑锋孔新刚王菲菲柴思敏张浩
Owner SHAANXI UNIV OF SCI & TECH