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Preparation method and application of Co3O4/NiO composite mesoporous nanoparticles

A nanoparticle and mesoporous technology, which is applied in the application field of the Co3O4/NiO composite mesoporous nanoparticle in the catalytic activation of methane, can solve the problem of no research on catalytic performance, and achieve uniform morphology, high dispersion and particle size. small effect

Inactive Publication Date: 2015-04-22
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There used to be "Sanchai Kuboon and Yun Hang HuInd, Eng. Chem. Res. 2011, 50, 2015–2020", calcining Ni(NO 3 ) 2 , Co(NO 3 ) 2 A mixture of NiO-CoO and Ni 3 o 4 -Co 3 o 4 composite oxides, but these are also non-porous materials, and their catalytic properties have not been studied

Method used

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  • Preparation method and application of Co3O4/NiO composite mesoporous nanoparticles
  • Preparation method and application of Co3O4/NiO composite mesoporous nanoparticles
  • Preparation method and application of Co3O4/NiO composite mesoporous nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] a)Co 3 o 4 Preparation of nanoparticles

[0024] 30ml0.5mol / L Co(CH 3 COO) 2 The solution was placed in a water bath at 70°C, 20ml of 4mol / L NaOH solution was slowly added thereto, and magnetically stirred for 60min. After the solution was cooled to room temperature, it was filtered and washed to obtain Co(OH) 2 precipitation. After drying, Co(OH) 2 Calcined in a muffle furnace. The calcination temperature is 180°C, and the calcination time is 3h. After calcination, Co 3 o 4 Nanoparticles.

[0025] b)Co 3 o 4 Preparation of / NiO Composite Mesoporous Nanoparticles

[0026] 0.0056g Co 3 o 4 Ultrasonic dispersion in 30ml distilled water, adding 3.49gNi(NO 3 ) 2 . 6H 2 O, after stirring evenly, slowly dropwise add 60ml NaOH solution containing 1.80gNaOH. After stirring for 10 minutes, transfer it into a 100ml reaction kettle, keep at 160°C for 15h, wash with distilled water and ethanol respectively, dry at 60°C, and calcinate at 200°C for 4h to obtain Co 3...

Embodiment 2

[0029] a)Co 3 o 4 Preparation of nanoparticles

[0030] 60ml0.2mol / L Co(CH 3 COO) 2 The solution was placed in a water bath at 70°C, 5ml of 1mol / L NaOH solution was slowly added thereto, and magnetically stirred for 120min. After the solution was cooled to room temperature, it was filtered and washed to obtain Co(OH) 2 precipitation. After drying, Co(OH) 2 Calcined in a muffle furnace. The calcination temperature is 300°C, and the calcination time is 1h. After calcination, Co 3 o 4 Nanoparticles.

[0031] b) Co. 3 o 4 Preparation of / NiO Composite Mesoporous Nanoparticles

[0032] 0.0291gCo 3 o 4 Ultrasonic dispersion in 60ml distilled water, adding 1.74gNi(NO 3 ) 2 . 6H 2 O, after stirring evenly, slowly add dropwise the 30mlNaOH solution containing 0.24gNaOH. After stirring for 30 minutes, transfer it into a 100ml reaction kettle, keep at 160°C for 24h, wash with distilled water and ethanol respectively, dry at 60°C, and calcinate at 400°C for 0.5h to obta...

Embodiment 3

[0035] a)Co 3 o 4 Preparation of nanoparticles

[0036] 40ml0.25mol / L Co(CH 3 COO) 2 The solution was placed in a water bath at 70°C, 10ml of 2mol / L NaOH solution was slowly added thereto, and magnetically stirred for 60min. After the solution was cooled to room temperature, it was filtered and washed to obtain Co(OH) 2 precipitation. After drying, Co(OH) 2 Calcined in a muffle furnace. The calcination temperature is 200°C, and the calcination time is 1h. After calcination, Co 3 o 4 Nanoparticles.

[0037] b) Co. 3 o 4 Preparation of / NiO Composite Mesoporous Nanoparticles

[0038] 0.5520g Co 3 o 4 Ultrasonic dispersion in 40ml distilled water, adding 2.00gNi(NO 3 ) 2 . 6H 2 O, after stirring evenly, slowly dropwise add 40ml NaOH solution containing 0.80gNaOH. After stirring for 40min, transfer it into a 100ml reaction kettle, keep at 180°C for 15h, wash with distilled water and ethanol respectively, dry at 60°C, and calcinate at 250°C for 1h to obtain Co 3...

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Abstract

The invention discloses a preparation method and an application of Co3O4 / NiO composite mesoporous nanoparticles. The method comprises the following steps: dispersing Co3O4 nanoparticles in distilled water, adding Ni(NO3)2.6H2O, uniformly stirring and slowly dropwise adding a NaOH solution, magnetically stirring, adding to a reaction kettle, and washing, drying and calcining an obtained reaction product so as to obtain the Co3O4 / NiO composite mesoporous nanoparticles; the application comprises the following steps: carrying out catalytic activation on methane by virtue of the nanoparticles at 60-200 DEG C, and opening C-H bonds in methane molecules. The Co3O4 / NiO composite mesoporous nanoparticles prepared by the preparation method of the invention are small in particle size, high in Co3O4 dispersion degree and uniform in morphology; the preparation method is cheap and easy to prepare the raw materials, low in cost, simple and convenient in steps and easy to operate; and the nanoparticles are suitable for the catalytic activation of the methane at low temperature.

Description

technical field [0001] The invention relates to the field of preparation of composite nanomaterials, in particular to a method for preparing Co 3 o 4 / NiO composite mesoporous nanoparticles preparation method, and the Co 3 o 4 Application of / NiO composite mesoporous nanoparticles in the catalytic activation of methane. Background technique [0002] Methane catalytic activation technology is a technology widely used in the economic fields of various countries in the world in recent years, but because methane has non-polar molecules similar to inert gases, the C-H bond energy is as high as 435KJ / mol, and it is very stable in thermodynamics, which makes methane almost impossible Provide active groups. How to activate such a stable molecule under mild conditions to achieve a reasonable transformation has always been concerned by people, and it is still a very challenging issue. [0003] Nanoscale transition metal oxides have attracted attention due to their electrical, mag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C01B3/40
CPCY02P20/52
Inventor 单永奎刘玉飞杨帆占瑛刘利婧倪扬扬
Owner EAST CHINA NORMAL UNIV
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