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Ce-based oxide catalyst, and preparation method and application thereof

A technology of catalysts and oxides, applied in the field of nanometers, can solve the problems of low-temperature catalytic activity and selectivity that cannot meet actual requirements, and achieve the effects of improving redox ability, promoting adsorption, and high catalytic conversion rate

Active Publication Date: 2018-01-26
FUZHOU UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since pure CeO 2 There are few acid sites on its own surface, resulting in low-temperature catalytic activity and selectivity far from meeting the actual requirements

Method used

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  • Ce-based oxide catalyst, and preparation method and application thereof
  • Ce-based oxide catalyst, and preparation method and application thereof
  • Ce-based oxide catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 Co / CeO 2 Preparation of nanocubes

[0028] 1.736 g Ce(NO 3 ) 3 ·6H 2 O (molecular weight 434.12) and 0.034g Co(NO 3 ) 2 ·6H 2 O (molecular weight 291.03) was dissolved in 10 mL of deionized water, and 70 mL, 6mol / L NaOH solution was added dropwise, stirred at room temperature for 1 h, then transferred to a hydrothermal kettle, reacted at 100 °C for 24 h, centrifuged, The obtained product was washed with deionized water and ethanol three times respectively, and then dried in vacuum at 60°C for 12 h, then heated in a muffle furnace to 500°C at a rate of 3°C / min, and calcined for 3 h.

Embodiment 2

[0029] Example 2 Co / CeO 2 Preparation of nanospheres

[0030] 0.434 g Ce(NO 3 ) 3 ·6H 2 O (molecular weight 434.12), 0.010g Co(NO 3 ) 2 ·6H 2 Add O (molecular weight 291.03) and 8 g urea (molecular weight 60) together to a mixed solvent consisting of 70 mL deionized water and 10 mL ethanol, stir at room temperature for 1 h, then add 0.1 mL of HCl (12M), and Stirred vigorously for 1 h, then transferred to a hydrothermal kettle, reacted at 160 °C for 12 h, centrifuged, washed with deionized water and ethanol three times, and then dried in vacuum at 60 °C for 12 h, then placed in a muffle furnace In the process, the temperature was raised to 550°C at a rate of 3°C / min, and fired for 2h.

Embodiment 3

[0031] Example 3 Co / CeO 2 Preparation of nanocones

[0032] 1.042 g Ce(NO 3 ) 3 ·6H 2 O (molecular weight 434.12), 0.033g Co(NO 3 ) 2 ·6H 2 O (molecular weight 291.03) and 0.384 g urea (molecular weight 60) were dissolved in 80 mL of deionized water, stirred at room temperature for 1 h, then transferred to a hydrothermal kettle, reacted at 120 °C for 8 h, and centrifuged. Wash with ionized water and ethanol three times respectively, then vacuum dry at 60°C for 12 h, and then heat up to 500°C at a rate of 3°C / min in a muffle furnace for 6 h.

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PUM

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Abstract

The invention discloses a Ce-based oxide catalyst, and a preparation method and an application thereof. The Ce / CeO2 catalyst is prepared through regulating the morphology of the catalyst by controlling the kind and the use amount of an added reducing agent and the temperature of a hydrothermal reaction with CeO2 as a carrier. The preparation method has the advantages of simplicity, convenience inoperation, low cost and high conversion rate, and the obtained catalyst has high catalytic oxidation activity in a wide temperature range, can be used in the catalytic oxidation of toluene and propane, has a high thermal stability, and has obvious industrial application values.

Description

technical field [0001] The invention belongs to the field of nanotechnology, and in particular relates to a Ce-based oxide catalyst and its preparation and application. Background technique [0002] Human survival and development are inseparable from a suitable environment. With the development of industry, environmental pollution is becoming more and more serious, and even threatens the survival and development of human beings. Therefore, it is urgent to protect the environment. Aromatic hydrocarbons are highly toxic to humans and animals. If they are exposed to high concentrations for a long time, they will cause nausea, headache, dizziness and other symptoms. In addition, polycyclic aromatic hydrocarbons in petroleum have a strong triple effect. Leaked crude oil and other hydrocarbons will cause a fire accident if exposed to an open flame; if the leaked hydrocarbon enters a confined space, it is very easy to explode, and even cause catastrophic accidents that cause mass ...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01D53/86B01D53/72
Inventor 江莉龙赵伟涛张凯王秀云肖益鸿蔡国辉
Owner FUZHOU UNIVERSITY
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