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A nickel cobaltate hollow sphere/carbon nitride quantum dot composite material and its preparation method and application

A composite material, hollow sphere technology, applied in the field of electrochemistry, can solve problems such as poor electrocatalytic performance

Active Publication Date: 2021-05-14
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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  • A nickel cobaltate hollow sphere/carbon nitride quantum dot composite material and its preparation method and application
  • A nickel cobaltate hollow sphere/carbon nitride quantum dot composite material and its preparation method and application
  • A nickel cobaltate hollow sphere/carbon nitride quantum dot composite material and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

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

[0039] Put 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 2 hours to obtain the product g-C 3 N 4 Quantum dot precursors.

[0040] Mix 0.25 mmol nickel nitrate, 0.50 mmol cobalt nitrate and 0.2 g 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 a hydrothermal reactor, and subjected to a constant temperature reaction at 180°C for 6h, and finally washed, filtered and dried to obtain the product 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 pl...

Embodiment 2

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

[0046] Put 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 2 hours to obtain the product g-C 3 N 4 Quantum dot precursors.

[0047] Mix 0.25 mmol nickel nitrate, 0.50 mmol cobalt nitrate and 0.2 g 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 a hydrothermal reactor, and subjected to a constant temperature reaction at 180°C for 6h, and finally washed, filtered and dried to obtain the product 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 pl...

Embodiment 3

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

[0052] Put 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 2 hours to obtain the product g-C 3 N 4 Quantum dot precursors.

[0053] Mix 0.25 mmol nickel nitrate, 0.50 mmol cobalt nitrate and 0.2 g 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 a hydrothermal reactor, and subjected to a constant temperature reaction at 180°C for 6h, and finally washed, filtered and dried to obtain the product NiCo 2 o 4 Hollow ball / g-C 3N 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 pla...

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Abstract

The invention relates to a nickel cobaltate hollow sphere / carbon nitride quantum dot composite material and a preparation method and application thereof. The composite material is made of nickel cobaltate NiCo with a molar mass ratio of 1mmol:0.4~1.2g 2 o 4 Hollow spheres and carbonized nitrogen g‑C 3 N 4 made of quantum dots, the g‑C 3 N 4 Quantum dots are deposited on the NiCo 2 o 4 on the hollow ball. In the composite material provided by the present invention, the carbon nitride quantum dots are small-sized nanostructures, and the material utilization rate is high; the nickel cobaltate hollow spheres have the function of storing electrolyte; the nickel cobaltate hollow spheres and the carbon nitride quantum dots form a surface ‑Point structure distribution, high electronic / ionic conductivity, excellent electrochemical catalytic performance, and can be widely used in the field of electrochemical catalysis.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a nickel cobaltate hollow sphere / carbon nitride quantum dot composite material and a preparation method and application thereof. Background technique [0002] At present, nickel cobalt oxide (NiCo 2 o 4 ) has been proven to be a new type of high-efficiency electrocatalytic material that can be applied to electrolysis of water for hydrogen production, oxygen reduction, and methanol oxidation. NiCo 2 o 4 Is Ni atom replacing Co 3 o 4 A composite double metal oxide obtained from Co atoms in the 3 o 4 The same spinel structure, due to the higher than pure Co 3 o 4 The conductivity of NiO is two orders of magnitude higher, so it has better electron conductivity and higher electrochemical activity. Especially NiCo prepared by various controllable techniques 2 o 4 The nanostructures exhibit higher catalytic activity, lower overpotential, and higher stability. Amo...

Claims

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Application Information

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Patent Type & Authority Patents(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