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Method for preparing Sm2O3/CuO nano composite through sol-gel process

A nanocomposite and gel method technology, which is applied in the field of nano-semiconductor composite material preparation, can solve the problems of low visible spectrum responsivity and reduced recombination probability of photogenerated electron-hole pairs, and it is easy to achieve stoichiometry and improve photocatalysis. Efficiency, the effect of good industrialization prospects

Inactive Publication Date: 2015-05-20
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] SM 2 o 3 As a wide bandgap semiconductor, it has a good research prospect in photodegradation of organic matter, but because of its wide bandgap (Eg=4.4eV), its response to the visible spectrum is low, but its photogenerated electron-hole pairs chances of recombination are greatly reduced

Method used

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  • Method for preparing Sm2O3/CuO nano composite through sol-gel process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Analytical pure Cu(NO 3 ) 2 ·3H 2 O and Sm(NO 3 ) 3 ·6H 2 O was dissolved in 10 mL deionized water at a molar ratio of 1:0.5 to prepare Sm 3+ For a solution with a concentration of 0.01mol / L, slowly add 3 to 6 drops of citric acid solution with a concentration of 1.00mg / L dropwise while magnetically stirring to form a mixed solution;

[0023] 2) In order to ensure that the metal ions are completely chelated, after adding an appropriate amount of ammonia solution to adjust the pH of the mixed solution to 7, fully stir the reaction for 6 hours;

[0024] 3) and in a water bath at 60°C for a period of time to obtain a viscous sol, and then heat and evaporate the sol to remove the solvent phase to obtain a xerogel;

[0025] 4) Move the xerogel to a muffle furnace and calcinate at 600°C for 4 hours, then cool with the furnace, take out the product and wash it with absolute ethanol and deionized water for 4 to 6 times, and dry it in a vacuum to obtain Sm 2 o 3 / CuO ...

Embodiment 2

[0027] 1) Analytical pure Cu(NO 3 ) 2 ·3H 2 O and Sm(NO 3 ) 3 ·6H 2 O was dissolved in 10 mL deionized water at a molar ratio of 1:2 to prepare Sm 3+ For a solution with a concentration of 0.04mol / L, slowly add 3 to 6 drops of citric acid solution with a concentration of 1.00mg / L dropwise while magnetically stirring to form a mixed solution;

[0028] 2) In order to ensure that the metal ions are completely chelated, after adding an appropriate amount of ammonia solution to adjust the pH of the mixed solution to 5, fully stir the reaction for 8 hours;

[0029] 3) and in a water bath at 90°C for a period of time to obtain a viscous sol, and then heat and evaporate the sol to remove the solvent phase to obtain a xerogel;

[0030] 4) Move the dry gel to a muffle furnace and calcinate at 800°C for 2 hours, then cool with the furnace, take out the product and wash it with absolute ethanol and deionized water for 4 to 6 times, and dry it in a vacuum to obtain Sm 2 o 3 / CuO na...

Embodiment 3

[0032] 1) Analytical pure Cu(NO 3 ) 2 ·3H 2 O and Sm(NO 3 ) 3 ·6H 2 O was dissolved in 10 mL deionized water at a molar ratio of 1:1 to prepare Sm 3+ For a solution with a concentration of 0.08mol / L, slowly add 3 to 6 drops of citric acid solution with a concentration of 1.00mg / L dropwise while magnetically stirring to form a mixed solution;

[0033] 2) In order to ensure that the metal ions are completely chelated, after adding an appropriate amount of ammonia solution to adjust the pH of the mixed solution to 6, fully stir the reaction for 7 hours;

[0034] 3) bathing in water at 60-90°C for a period of time to obtain a viscous sol, and then heating and evaporating the sol to remove the solvent phase to obtain a xerogel;

[0035] 4) Move the xerogel to a muffle furnace for calcination at 800°C for 4 hours, then cool with the furnace, take out the product and wash it with absolute ethanol and deionized water for 4 to 6 times, and dry it in a vacuum to obtain Sm 2 o 3 ...

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Abstract

The invention discloses a method for preparing a Sm2O3 / CuO nano composite through a sol-gel process. The method comprises the following steps: dissolving Cu(NO3)2.3H2O and Sm(NO3)2.6H2O in deionized water to prepare a nitrate solution mixed with metal ions and adding a citric acid solution while magnetic stirring to obtain a mixed solution; adjusting the pH value of the mixed solution to 5-7 and fully stirring and reacting for 6-8h; carrying out water bath at temperature of 60-90 DEG C for a period of time to obtain viscous sol; heating the sol for evaporating out the solvent phase to obtain dry gel; transferring the dry gel to a preheated muffle furnace, calcining for 2-4h at 600-800 DEG C, cooling in the furnace, taking out the product, washing with water and drying to finally obtain Sm2O3 / CuO nano composite powder. Due to adoption of the sol-gel process, the chemical components and chemometry of the product are easily controlled, the product purity is high, the process equipment is simple, the operability is strong, and the cost is low.

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 2 o 3 / CuO nanocomposite approach. 【Background technique】 [0002] As a metal oxide with 4f electronic structure, samarium oxide has a wide forbidden band width, which is 4-6eV at room temperature. SM 2 o 3 Its excellent properties determine that it has broad research prospects in scientific and technological applications, such as high resistivity, high dielectric constant and high chemical stability. Nano-samarium oxide also has the performance of preparing ceramic capacitors and catalysts, especially in the aspect of photocatalytic performance, which has extensive potential research value. [0003] SM 2 o 3 As a wide bandgap semiconductor, it has a good research prospect in the photodegradation of organic matter, but because of its wide bandgap (Eg=4.4eV), its response to the visible spectrum is low, but its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83
Inventor 殷立雄王菲菲马建中黄剑锋孔新刚张东东柴思敏裴宇梁
Owner SHAANXI UNIV OF SCI & TECH
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