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One-dimensional basic cobalt carbonate@two-dimensional CoSe/NF heterostructure composite material and preparation method and application thereof

A technology of heterostructures and composite materials, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of poor electrocatalytic activity and cycle instability, and achieve low cost and stable cycle. Good sex, mild conditions

Active Publication Date: 2019-01-11
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it can be seen that the general single transition metal electrode material still has defects such as poor electrocatalytic activity and unstable cycle that need to be improved.

Method used

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  • One-dimensional basic cobalt carbonate@two-dimensional CoSe/NF heterostructure composite material and preparation method and application thereof
  • One-dimensional basic cobalt carbonate@two-dimensional CoSe/NF heterostructure composite material and preparation method and application thereof
  • One-dimensional basic cobalt carbonate@two-dimensional CoSe/NF heterostructure composite material and preparation method and application thereof

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preparation example Construction

[0021] The invention provides a preparation method of one-dimensional basic cobalt carbonate@two-dimensional CoSe / NF heterostructure composite material, comprising: basic cobalt carbonate nanowire Co(CO 3 ) 0.5 (OH)·0.11H 2 O, selenium source, and cobalt are derived from solvents for solvothermal reaction to prepare one-dimensional basic cobalt carbonate@two-dimensional CoSe / NF heterostructure composites; wherein, basic cobalt carbonate nanowires are supported on foamed nickel NF.

[0022] In the above preparation method, the amount of each material can be selected in a wide range, but in order to further improve the electrocatalytic performance and cycle performance of the heterostructure composite material, preferably, basic cobalt carbonate nanowires, selenium source, cobalt source , The dosage ratio of NF is 0.02-0.08g:0.5-2.5mmol:0.5-2.5mmol:2.4-4mmol.

[0023] In the above preparation method, the amount of solvent can be selected in a wide range, but in order to furthe...

Embodiment 1

[0035] 1) Dissolve 1mmol of cobalt nitrate hexahydrate, 3mmol of ammonium fluoride, and 10mmol of urea in 35ml of deionized water. After magnetically stirring for 30min, transfer the mixed solution into a 50ml reaction kettle, and then add 6cm 2 Nickel foam (0.141g, 2.4mmol); put the reaction kettle in a thermostat at 120°C, and react for 10h; after the reaction, wash and dry to obtain one-dimensional Co(CO 3 ) 0.5 (OH)·0.11H 2 O / NF nanowire 0.2626g (containing 0.0446g Co(CO 3 )0.5 (OH)·0.11H 2 O);

[0036] 2) Add the mixed solution of cobalt acetate tetrahydrate and sodium selenium hydride (30ml, containing 1.2mmol each of cobalt acetate tetrahydrate and sodium selenium hydride) into a 50ml reaction kettle, and then add the above-mentioned 0.2626g one-dimensional Co(CO 3 ) 0.5 (OH)·0.11H 2 O / NF nanowires, sealed, put the reaction kettle into a constant temperature drying oven at 180°C for 3 hours, wash after the reaction, and dry at 70°C to obtain one-dimensional and tw...

Embodiment 2

[0038] 1) Dissolve 2mmol of cobalt nitrate hexahydrate, 5mmol of ammonium fluoride, and 5mmol of urea in 35ml of deionized water. After magnetically stirring for 30min, transfer the mixed solution into a 50ml reaction kettle, and then add 6cm 2 Nickel foam (0.141g); place the reactor in a thermostat at 140°C, and react for 10 hours; after the reaction, wash and dry to obtain one-dimensional Co(CO 3 ) 0.5 (OH)·0.11H 2 O / NF nanowire 0.2894g (containing 0.0714g Co(CO 3 ) 0.5 (OH)·0.11H 2 O);

[0039] 2) Add the mixed solution of cobalt acetate tetrahydrate and sodium selenium hydride (30ml, containing 1mmol each of cobalt acetate tetrahydrate and sodium selenium hydride) into a 50ml reaction kettle, and then add the above-mentioned 0.2894g one-dimensional Co(CO 3 ) 0.5 (OH)·0.11H 2 O / NF nanowires, sealed, put the reaction kettle into a constant temperature drying oven at 160°C for 5 hours, wash after the reaction, and dry at 70°C to obtain one-dimensional and two-dimension...

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Abstract

The invention discloses a one-dimensional basic cobalt carbonate@two-dimensional CoSe / NF heterostructure composite material and a preparation method and an application thereof. The preparation methodcomprises the following step: carrying out a solvothermal reaction on a basic cobalt carbonate nanowire Co(CO3)0.5(OH).0.11H2O, a selenium source and a cobalt source in a solvent to prepare the one-dimensional basic cobalt carbonate@two-dimensional CoSe / NF heterostructure composite material, wherein the basic cobalt carbonate nanowire is loaded to foam nickel NF. The heterostructure composite material has excellent electrocatalytic and cyclic performance, so that the heterostructure composite material can be applied to electrocatalytic hydrolysis. Meanwhile, the preparation method has the advantages of being simple in process and low in price.

Description

technical field [0001] The present invention relates to a heterostructure composite material, in particular to a one-dimensional basic cobalt carbonate@two-dimensional CoSe / NF heterostructure composite material and its preparation method and application. Background technique [0002] Due to their unique physical and chemical properties, transition metal selenides have aroused great interest in the fields of catalysis, electrochemistry and gas sensors. Transition metal selenides have become a research hotspot due to their high catalytic activity, low cost, easy synthesis, and good stability. Traditional transition metals include cobalt selenide and cobalt diselenide, etc. Most of them are selenides of a single transition metal, and there are relatively few studies on selenides with various morphological heterostructures. [0003] The performance of electrocatalytic hydrolysis largely depends on its electrode materials. The current electrode materials are mainly researched on...

Claims

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Application Information

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IPC IPC(8): B01J27/236C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J27/236B01J35/33Y02E60/36
Inventor 阙荣辉纪刚
Owner ANHUI NORMAL UNIV
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