Preparation method and application of cerium dioxide nanowire

A ceria and nanowire technology, applied in the preparation/processing of rare earth metal compounds, chemical instruments and methods, ceria/ceria hydroxide, etc., can solve the problem of uneven distribution of ceria nanowires and small aspect ratio and other problems, to achieve the effect of low cost, good stability and cost reduction

Active Publication Date: 2021-12-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned prior art, the shortcoming of non-uniform distribution of ceria nanowires and sm...

Method used

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  • Preparation method and application of cerium dioxide nanowire
  • Preparation method and application of cerium dioxide nanowire
  • Preparation method and application of cerium dioxide nanowire

Examples

Experimental program
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Embodiment 1

[0029] A preparation method of ceria nanowires, comprising the following steps:

[0030] 1) Dissolve 1.74g cerium nitrate hexahydrate and 0.1269g ammonium molybdate tetrahydrate in 40mL distilled water to obtain a mixed solution of cerium nitrate and ammonium molybdate; dissolve 19.2g sodium hydroxide in 40mL distilled water to obtain sodium hydroxide solution;

[0031] 2) Add the sodium hydroxide solution dropwise into the mixed solution of cerium nitrate and ammonium molybdate under constant stirring, and keep stirring for 30 minutes to obtain a new mixed solution;

[0032] 3) The new mixed solution was transferred to a 100 mL polytetrafluoroethylene-lined stainless steel autoclave, and reacted at 120° C. for 36 h. After the reaction was finished and cooled naturally, the lower layer of precipitate was left.

[0033] 4) Centrifugal washing with deionized water and ethanol solution for several times to neutrality, and drying at 60° C. for 8 hours to obtain a molybdenum-ceri...

Embodiment 2

[0036] A preparation method of ceria nanowires, comprising the following steps:

[0037] 1) Dissolve 1.74g of cerium nitrate hexahydrate and 0.06345g of ammonium molybdate tetrahydrate in 40mL of distilled water to obtain a mixed solution of cerium nitrate and ammonium molybdate; dissolve 19.2g of sodium hydroxide in 40mL of distilled water to obtain sodium hydroxide solution;

[0038] 2) Add the sodium hydroxide solution dropwise into the mixed solution of cerium nitrate and ammonium molybdate under constant stirring, and keep stirring for 30 minutes to obtain a new mixed solution;

[0039] 3) The new mixed solution was transferred to a 100 mL polytetrafluoroethylene-lined stainless steel autoclave, and reacted at 80° C. for 48 h. After the reaction was finished and cooled naturally, the lower layer of precipitate was left.

[0040] 4) Centrifugal washing with deionized water and ethanol solution for several times to neutrality, and drying at 50° C. for 8 hours to obtain a ...

Embodiment 3

[0043] A preparation method of ceria nanowires, comprising the following steps:

[0044] 1) Dissolve 1.74g cerium nitrate hexahydrate and 0.0187g sodium molybdate dihydrate in 40mL distilled water to obtain a mixed solution of cerium nitrate and ammonium molybdate; dissolve 19.2g sodium hydroxide in 40mL distilled water to obtain sodium hydroxide solution;

[0045] 2) Add the sodium hydroxide solution dropwise into the mixed solution of cerium nitrate and sodium molybdate under continuous stirring, and keep stirring for 30 minutes to obtain a new mixed solution;

[0046] 3) The new mixed solution was transferred to a 100 mL polytetrafluoroethylene-lined stainless steel autoclave, and reacted at 100° C. for 24 h. After the reaction was finished and cooled naturally, the lower layer of precipitate was left.

[0047] 4) Centrifugal washing with deionized water and ethanol solution several times to neutrality, and drying at 80° C. for 6 hours to obtain a molybdenum-cerium precur...

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Abstract

The invention discloses a preparation method and application of a cerium dioxide nanowire, and belongs to the technical field of material preparation and environmental governance. The method comprises the following steps: carrying out a strong alkaline hydrothermal reaction on an aqueous solution of a molybdenum source and an aqueous solution of a cerium source to generate a mixture of a cerium oxide precursor and the molybdenum source, and uniformly mixing the mixture through hydrothermal stirring; and finally, carrying out high-temperature calcination in an air atmosphere to obtain the cerium dioxide nanowire. After cerium dioxide is modified with molybdenum, the morphology of cerium dioxide can be changed, the yield of carbon dioxide can be increased, precious metal can be replaced to achieve the purpose of increasing the yield of carbon dioxide, and the cost is remarkably reduced. The method has the advantages of simple operation, easily available raw materials, low cost, low energy consumption and the like; the stability is good, the activity is high, and the efficiency of photo-thermal catalytic combustion of volatile organic compounds is high.

Description

technical field [0001] The invention belongs to the technical field of material preparation and environmental treatment, and relates to a preparation method and application of ceria nanowires. Background technique [0002] VOCs (Volatile organic compounds) refer to various organic compounds with a boiling point of 50-260°C at room temperature, which can participate in the formation of ozone, photochemical smog, and secondary airgel in the atmospheric environment, and are important factors that aggravate the complex pollution of the atmosphere. Directly affect human health and sustainable economic and social development. In recent years, the pollution control of volatile organic compounds has been highly valued. The catalytic combustion method is considered to be one of the most effective technologies for treating VOCs due to its advantages of high removal efficiency and no secondary pollution, and the development of efficient catalysts is the key to enhancing the core compe...

Claims

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Application Information

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IPC IPC(8): C01F17/10C01F17/235B82Y30/00B82Y40/00B01J23/28B01J35/06
CPCC01F17/10C01F17/235B82Y30/00B82Y40/00B01J23/28B01J35/06B01J35/023B01J35/004C01P2002/72C01P2004/03C01P2004/61
Inventor 赵杰王婷张泽星屈妙李昊龙
Owner SHAANXI UNIV OF SCI & TECH
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