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Nickel cobaltate hollow sphere/carbon nitride quantum dot composite material, preparation method and application thereof

A composite material and hollow sphere technology, applied in the field of electrochemistry, can solve problems such as poor electrocatalytic performance, and achieve the effects of excellent electrochemical catalytic performance, simple preparation method and high conductivity

Active Publication Date: 2018-10-02
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of poor electrocatalytic performance of composite materials in the prior art, and provide a nickel cobaltate hollow sphere / carbon nitride quantum dot composite material

Method used

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  • Nickel cobaltate hollow sphere/carbon nitride quantum dot composite material, preparation method and application thereof
  • Nickel cobaltate hollow sphere/carbon nitride quantum dot composite material, preparation method and application thereof
  • Nickel cobaltate hollow sphere/carbon nitride quantum dot composite material, preparation method and application thereof

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Embodiment 1

[0038] This embodiment provides a NiCo 2 O 4 Hollow ball / g-C 3 N 4 Quantum dot composite material, the composite electrode material contains NiCo 2 O 4 Hollow ball and g-C 3 N 4 The molar mass ratio of quantum dots is: 1mmol:0.8g, which is prepared by the following preparation method:

[0039] Place 50g of urea in a ceramic crucible, cover it with a lid, and place it in a muffle furnace for heat treatment at 550°C for 2h to obtain a product of g-C 3 N 4 Quantum dot precursor.

[0040] Combine 0.25 mmol nickel nitrate, 0.50 mmol cobalt nitrate and 0.2g g-C 3 N 4 The quantum dot precursor was dissolved and dispersed with 50ml of glycerol and 10ml of ethylene glycol, then added to the hydrothermal reactor, and reacted at a constant temperature at 180°C for 6h, and finally washed, filtered and dried to obtain the product as NiCo 2 O 4 Hollow ball / g-C 3 N 4 Quantum dot hybrid precursors.

[0041] 0.2g NiCo 2 O 4 Hollow ball / g-C 3 N 4 The quantum dot mixed precursor is placed in a ceramic c...

Embodiment 2

[0045] This embodiment provides a NiCo 2 O 4 Hollow ball / g-C 3 N 4 Quantum dot composite material, the composite electrode material contains NiCo 2 O 4 Hollow ball and g-C 3 N 4 The molar mass ratio of quantum dots is: 1mmol:0.8g, which is prepared by the following preparation method:

[0046] Place 50g of urea in a ceramic crucible, cover it with a lid, and place it in a muffle furnace for heat treatment at 550°C for 2h to obtain a product of g-C 3 N 4 Quantum dot precursor.

[0047] Combine 0.25 mmol nickel nitrate, 0.50 mmol cobalt nitrate and 0.2g g-C 3 N 4 The quantum dot precursor was dissolved and dispersed with 50ml of glycerol and 10ml of ethylene glycol, then added to the hydrothermal reactor, and reacted at a constant temperature at 180°C for 6h. Finally, the product was washed, filtered and dried to obtain NiCo. 2 O 4 Hollow ball / g-C 3 N 4 Quantum dot hybrid precursors.

[0048] 0.2g NiCo 2 O 4 Hollow ball / g-C 3 N 4 The quantum dot mixed precursor is placed in a ceramic cr...

Embodiment 3

[0051] This embodiment provides a NiCo 2 O 4 Hollow ball / g-C 3 N 4 Quantum dot composite material, the composite electrode material contains NiCo 2 O 4 Hollow ball and g-C 3 N 4 The molar mass ratio of quantum dots is: 1mmol:0.8g, which is prepared by the following preparation method:

[0052] Place 50g of urea in a ceramic crucible, cover it with a lid, and place it in a muffle furnace for heat treatment at 550°C for 2h to obtain a product of g-C 3 N 4 Quantum dot precursor.

[0053] Combine 0.25 mmol nickel nitrate, 0.50 mmol cobalt nitrate and 0.2g g-C 3 N 4 The quantum dot precursor was dissolved and dispersed with 50ml of glycerol and 10ml of ethylene glycol, then added to the hydrothermal reactor, and reacted at a constant temperature at 180°C for 6h. Finally, the product was washed, filtered and dried to obtain NiCo. 2 O 4 Hollow ball / g-C 3 N 4 Quantum dot hybrid precursors.

[0054] 0.2g NiCo 2 O 4 Hollow ball / g-C 3 N 4 The quantum dot mixed precursor is placed in a ceramic cr...

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Abstract

The invention relates to a nickel cobaltate hollow sphere / carbon nitride quantum dot composite material, a preparation method and application thereof. The composite material is prepared from nickel cobaltate NiCo2O4 hollow spheres and carbon nitride g-C3N4 quantum dots in a molar mass ratio of 1mmol:0.4-1.2g, and the g-C3N4 quantum dots are deposited on the NiCo2O4 hollow spheres. According to thecomposite material provided by the invention, the carbon nitride quantum dots have a small-sized nanostructure and high material utilization ratio; the nickel cobaltate hollow spheres have the electrolyte solution storage function; the nickel cobaltate hollow spheres and the carbon nitride quantum dots form surface-point structure distribution, the electron / ion conductivity is high, and the electrochemical catalytic performance is excellent, therefore the nickel cobaltate hollow sphere / carbon nitride quantum dot composite material can be widely applied to the electrochemical catalysis field.

Description

Technical field [0001] The invention belongs to the field of electrochemistry, and specifically relates to a nickel cobaltate hollow sphere / carbon nitride quantum dot composite material and a preparation method and application thereof. Background technique [0002] Currently, nickel cobalt oxide (NiCo 2 O 4 ) It is proved to be a new type of high-efficiency electrocatalytic material that can be applied to hydrogen production by electrolysis of water, oxygen reduction, and methanol oxidation. NiCo 2 O 4 Ni atom replaces Co 3 O 4 A composite bimetal oxide derived from Co atoms in the 3 O 4 The same spinel structure, because it has better than pure Co 3 O 4 And NiO has two orders of magnitude higher conductivity, so it has better electronic conductivity and higher electrochemical activity. NiCo specially prepared by various controllable technologies 2 O 4 Nanostructures show higher catalytic activity, lower overpotential, and higher stability. Among them, NiCo 2 O 4 The hollow sphe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/90H01M4/9033Y02E60/50
Inventor 李泽胜杨蓉蓉何伟培孙倩倩李泊林
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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