Cobaltosic oxide-nickel oxide double-layer mesoporous nanotube composite material as well as preparation method and application thereof

A technology of tricobalt tetroxide and composite materials, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, nanotechnology, etc., can solve problems such as hindering electron/mass transfer and internal material utilization

Active Publication Date: 2021-09-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most exist in a solid interior, severely hampering electron / mass transfer and utilization of the interior materials

Method used

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  • Cobaltosic oxide-nickel oxide double-layer mesoporous nanotube composite material as well as preparation method and application thereof
  • Cobaltosic oxide-nickel oxide double-layer mesoporous nanotube composite material as well as preparation method and application thereof
  • Cobaltosic oxide-nickel oxide double-layer mesoporous nanotube composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Step 1: Weigh 0.873g cobalt nitrate hexahydrate, 0.3993g L-aspartic acid in a 50mL polytetrafluoroethylene-lined stainless steel hydrothermal reaction kettle, and add 10mL deionized water and 18mL ethylene glycol to it, Add 3mL, 2mol / L sodium hydroxide solution under magnetic stirring, and stir magnetically at room temperature until the solution turns transparent reddish brown. Then transfer the reaction kettle to a 180°C electric blast drying oven and keep it for 5 hours. After the end, the pink solid is collected by centrifugation, and then washed with water and ethanol for four times, and finally placed in a vacuum drying oven at 40°C. Drying for 12 hours under the hood to obtain Co-Asp nanowires.

[0042] Step 2: Weigh 0.075 g of Co-Asp nanowires into a 100 mL beaker, add 20 mL of absolute ethanol therein, and stir to disperse the Co-Asp nanowires.

[0043] Step 3: Add 10mL (0.1mol L -1 ) ethanol solution of nickel nitrate hexahydrate, after mixing evenly, transfe...

Embodiment 2

[0046] Step 1: Weigh 1.746g cobalt nitrate hexahydrate, 0.7986g L-aspartic acid in a 50mL polytetrafluoroethylene-lined stainless steel hydrothermal reaction kettle, and add 10mL deionized water and 18mL ethylene glycol to it, Add 6 mL of 2 mol / L sodium hydroxide solution under magnetic stirring, and stir magnetically at room temperature until the solution turns transparent reddish brown. Then transfer the reaction kettle to a 180°C electric blast drying oven and keep it for 5 hours. After the end, the pink solid is collected by centrifugation, and then washed with water and ethanol for four times, and finally placed in a vacuum drying oven at 40°C. Drying for 12 hours under the hood to obtain Co-Asp nanowires.

[0047] Step 2: Weigh 0.075 g of Co-Asp nanowires into a 100 mL beaker, add 20 mL of absolute ethanol therein, and stir to disperse the Co-Asp nanowires.

[0048] Step 3: Add 10mL (0.1mol L -1 ) ethanol solution of nickel nitrate hexahydrate, after mixing evenly, tra...

Embodiment 3

[0051] Step 1: Weigh 0.873g cobalt nitrate hexahydrate, 0.3993g L-aspartic acid in a 50mL polytetrafluoroethylene-lined stainless steel hydrothermal reaction kettle, and add 10mL deionized water and 18mL ethylene glycol to it, Add 3mL, 2mol / L sodium hydroxide solution under magnetic stirring, and stir magnetically at room temperature until the solution turns transparent reddish brown. Then transfer the reaction kettle to a 180°C electric blast drying oven and keep it for 5 hours. After the end, the pink solid is collected by centrifugation, and then washed with water and ethanol for four times, and finally placed in a vacuum drying oven at 40°C. Drying for 12 hours under the hood to obtain Co-Asp nanowires.

[0052] Step 2: Weigh 0.150 g of Co-Asp nanowires into a 100 mL beaker, add 20 mL of absolute ethanol therein, and stir to disperse the Co-Asp nanowires.

[0053] Step 3: Add 20mL (0.1mol L -1 ) ethanol solution of nickel nitrate hexahydrate, after mixing evenly, transfe...

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Abstract

The invention discloses a cobaltosic oxide-nickel oxide double-layer mesoporous nanotube composite material as well as a preparation method and application thereof. A simple and convenient hydrothermal reaction technology is utilized, a Co-Asp nanowire is used as a template, and through the preparation processes of complexing of Ni < 2 + > and organic matter, Ni-Asp growth and annealing, the cobaltosic oxide-nickel oxide double-layer mesoporous nanotube composite material with high stability and high activity of electrocatalytic reduction of nitrate to prepare ammonia is prepared, and the cobaltosic oxide and the nickel oxide are compounded to realize conversion of tetrahydroisoquinoline into coupling of electroreduction of dihydroisoquinoline and nitrate from semi-dehydrogenation.

Description

technical field [0001] The present invention relates to the technical field of transition metal oxide nanomaterials, and more specifically, relates to a double-layer mesoporous nanotube composite material with a core-shell structure of tricobalt tetroxide-nickel oxide and its preparation method and application. Background technique [0002] The selective conversion of nitrate to ammonia is a promising approach not only to eliminate the severe nitric acid pollution in groundwater but also to produce useful ammonia. Currently, as an alternative to conventional techniques, electrocatalytic nitrate reduction is considered to be an efficient and environmentally friendly method for nitric acid removal. Therefore, the development of new electrocatalysts to promote the selective conversion of nitrate to ammonia has very important research value and application prospects. At the same time, the selective dehydrogenation of tetrahydroisoquinoline to dihydroisoquinoline is of great sig...

Claims

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Application Information

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IPC IPC(8): B01J23/755C25B1/27C25B3/05C25B3/09C25B3/23C25B11/091B82Y40/00
CPCB01J23/755B01J23/002C25B1/00B01J35/23B01J35/33
Inventor 张兵张超鑫王雨婷
Owner TIANJIN UNIV
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