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A zno/sm 2 o 3 Composite film and its preparation method and application

A composite film and dry film technology, which is applied in the preparation/processing of rare earth metal compounds, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Satisfied people, long hydrothermal treatment time, etc., to achieve the effect of narrow nano-particle size distribution, easy recovery, and easy industrial production

Active Publication Date: 2020-12-29
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods prepare Sm 2 o 3 The thin film has a single function, and secondly, the sol-gel method prepares a single Sm 2 o 3 The film has a large stress and is prone to microcracks, and the effect is not satisfactory; hydrothermal reaction usually requires high temperature and pressure, high requirements for equipment, poor crystallinity, uneven surface, and long hydrothermal treatment time; Vapor deposition method requires high equipment, low raw material utilization rate, and high energy; solvothermal equipment has high requirements, slow reaction, and long time

Method used

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  • A zno/sm <sub>2</sub> o <sub>3</sub> Composite film and its preparation method and application
  • A zno/sm <sub>2</sub> o <sub>3</sub> Composite film and its preparation method and application
  • A zno/sm <sub>2</sub> o <sub>3</sub> Composite film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Mix ethylene glycol methyl ether and acetic anhydride in a ratio of 2:1 by volume, and stir for 1 hour to obtain a homogeneous solution A;

[0032] 2) Analytical pure Sm(NO) 3 ·6H 2 O was added to solution A and stirred thoroughly for 0.1 h to obtain Sm 3+ With a concentration of 0.1mol / L, a homogeneous solution B was prepared;

[0033] 3) Analytical pure Zn(NO 3 ) 2 ·6H 2 O was added to the homogeneous solution B so that Zn 2+ The mass fraction of Sm 3+ 1% of the mass fraction, using a magnetic stirrer to stir for 1 h to form Sol C;

[0034] 4) aging sol C at room temperature for 8 hours to form gel D;

[0035] 5) Spin-coating: apply the gel D to a cleaned conductive glass substrate by spin-coating to prepare a wet film;

[0036] 6) Baking: Baking the prepared wet film at 80°C to obtain a dry film;

[0037] 7) On the dry film in step 6), repeat the spin-coating and baking processes several times to obtain a film with a preset thickness;

[0038] 8) Place th...

Embodiment 2

[0040] 1) Mix and stir ethylene glycol methyl ether and acetic anhydride at a volume ratio of 2.5:1 for 2 hours to prepare a homogeneous solution A;

[0041] 2) Analytical pure Sm(NO) 3 ·6H 2 O was added to solution A and stirred thoroughly for 0.3h to obtain Sm 3+ With a concentration of 0.5mol / L, a homogeneous solution B was prepared;

[0042] 3) Analytical pure Zn(NO 3 ) 2 ·6H 2 O was added to the homogeneous solution B, Zn 2+ The mass fraction of Sm 3+ 3% of the mass fraction, using a magnetic stirrer to stir for 2h to form Sol C;

[0043] 4) Aging sol C at room temperature for 10 h to form gel D;

[0044] 5) Spin-coating: apply the gel D to a cleaned conductive glass substrate by spin-coating to prepare a wet film;

[0045] 6) Baking: Baking the prepared wet film at 150°C to obtain a dry film;

[0046] 7) On the dry film in step 6), repeat the spin-coating and baking processes several times to obtain a film with a preset thickness;

[0047] 8) Place the film wi...

Embodiment 3

[0049] 1) Mix and stir ethylene glycol methyl ether and acetic anhydride at a volume ratio of 3:1 for 4 hours to prepare a homogeneous solution A;

[0050] 2) Analytical pure Sm(NO) 3 ·6H 2 O was added to solution A and stirred thoroughly for 0.3h to obtain Sm 3+ A homogeneous solution B with a concentration of 0.3mol / L;

[0051] 3) Analytical pure Zn(NO 3 ) 2 ·6H 2 O was added to the homogeneous solution B so that Zn 2+ The mass fraction of Sm 3+ 6% of the mass fraction, using a magnetic stirrer to stir for 3.5h to form Sol C;

[0052] 4) Aging sol C at room temperature for 12 hours to form gel D;

[0053] 5) Spin-coating: apply the gel D to a cleaned conductive glass substrate by spin-coating to prepare a wet film;

[0054] 6) Baking: Baking the prepared wet film at 180°C to obtain a dry film;

[0055] 7) On the dry film in step 6), repeat the spin-coating and baking processes several times to obtain a film with a preset thickness;

[0056] 8) Place the film with ...

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Abstract

A kind of ZnO / Sm 2 O 3 Composite film and its preparation method and application. First, Sm source and Zn source are added to a uniform solution A of ethylene glycol methyl ether and acetic anhydride and stirred to form sol C; then sol C is left to stand and aged to form gel D; The spin coating method is used to coat the substrate on the substrate, and after baking, a dry film is obtained; then the spin coating and baking processes are repeated several times on the resulting dry film to obtain a film with a preset thickness; and finally, after high-temperature annealing, ZnO is obtained / Sm 2 O 3 Composite film. ZnO / Sm of the present invention 2 O 3 The composite film has the characteristics of narrow particle size distribution, good dispersion, good photocatalytic performance, strong crystallinity and low cost. The preparation method has low equipment requirements, simple process, easy operation, low energy consumption and short reaction time. It has good industrialization prospects; the composite film has excellent photocatalytic performance and is widely used in fields such as photocatalytic degradation of organic matter.

Description

technical field [0001] The invention belongs to the technical field of preparation of composite thin films, in particular to a ZnO / Sm 2 o 3 Composite film and its preparation method and application. Background technique [0002] SM 2 o 3 It is a wide band gap metal oxide with 4f electronic structure, the band gap at room temperature is 4-6eV, Sm 2 o 3 The crystal has three crystal forms. When the temperature is higher than 850°C, the monoclinic phase transforms into a cubic crystal phase, and it transforms into a hexagonal crystal phase at around 2000°C, which belongs to the oxide of polycrystalline phase transformation. SM 2 o 3 It has high resistivity, high dielectric constant, high chemical stability and thermal stability, and has superior electrical, optical and magnetic properties. It is widely used in ceramic capacitors, automobile exhaust treatment, catalysts and medicine, etc. ; In addition, nano Sm 2 o 3 It also has nuclear properties and can be used as st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G9/02C01F17/224C01F17/10B01J23/10
CPCC01G9/02B01J23/10C01P2002/72C01P2004/03C01P2006/80C01F17/206B01J35/39
Inventor 殷立雄刘长青李慧敏黄剑锋孔新刚张峰房佳萌白培杰
Owner SHAANXI UNIV OF SCI & TECH