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Preparation method of cobaltosic oxide and carbon quantum dot composite material

A technology of cobalt tetroxide and carbon quantum dots, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of high cost, complicated process of ORR oxygen evolution cathode catalyst, etc., and achieve low cost, improved electrochemical performance, and improved electrocatalytic performance. Effect

Pending Publication Date: 2021-09-24
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

[0007] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a preparation method of tricobalt tetroxide and carbon quantum dot composite material, which has simple process, convenient operation and low cost; overcomes the prior art ORR oxygen precipitation cathode catalyst process Disadvantages such as complexity and high cost

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  • Preparation method of cobaltosic oxide and carbon quantum dot composite material
  • Preparation method of cobaltosic oxide and carbon quantum dot composite material
  • Preparation method of cobaltosic oxide and carbon quantum dot composite material

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preparation example Construction

[0028] refer to Figure 1-3 , a preparation method of tricobalt tetroxide and carbon quantum dot composite material, comprising the following steps:

[0029] S1. Add 1.5g of disposable chopsticks sawdust to deionized water, stir evenly, transfer to a 100ml reaction kettle, and react at 180°C for 6h to obtain a turbid carbon quantum dot solution;

[0030] S2. Suction filter the turbid carbon quantum dot solution obtained in step S1 with a filter membrane of 0.22 μm;

[0031] S3, the solution obtained in step S2 was dialyzed for 2 days with a 500Da dialysis bag to obtain a carbon quantum dot solution;

[0032] S4, 25g carbon quantum dot solution obtained in step S3 is mixed with 176.5mg cobalt nitrate hexahydrate, 120mg urea, 145.6mg cetyltrimethylammonium bromide, 25g deionized water, and ultrasonically stirred evenly;

[0033] S5, the solution obtained in step S4 is transferred to a 100ml reactor for reaction, and reacted for 12h at 160° C. to generate basic cobalt carbonate...

Embodiment 1

[0042] A preparation method of tricobalt tetroxide / carbon quantum dot composite material, the specific steps are as follows:

[0043] Add 1.5g of disposable chopsticks sawdust to deionized water, stir evenly, transfer to a 100ml reaction kettle, and react at 180°C for 6h to obtain a turbid carbon quantum dot solution;

[0044] The turbid carbon quantum dot solution obtained in (1) is suction-filtered with a filter membrane of 0.22 μm;

[0045] The solution obtained in (2) was dialyzed for 2 days with a 500 Da dialysis bag to obtain a carbon quantum dot solution.

[0046] The 25g carbon quantum dot solution obtained in (3) was mixed with 176.5mg cobalt nitrate hexahydrate, 120mg urea, 145.6mg cetyltrimethylammonium bromide, 25g deionized water, and ultrasonically stirred evenly;

[0047] The solution obtained in (4) was transferred to a 100ml reactor for reaction, and reacted at 160° C. for 12 hours to generate basic cobalt carbonate;

[0048] The basic cobalt carbonate / carbo...

Embodiment 2

[0052] Add 1.5g of disposable chopsticks sawdust to deionized water, stir evenly, transfer to a 100ml reaction kettle, and react at 180°C for 12h to obtain a turbid carbon quantum dot solution;

[0053] The turbid carbon quantum dot solution obtained in (1) is suction-filtered with a filter membrane of 0.22 μm;

[0054] The solution obtained in (2) was dialyzed for 2 days with a 500 Da dialysis bag to obtain a carbon quantum dot solution.

[0055] The 25g carbon quantum dot solution obtained in (3) was mixed with 176.5mg cobalt nitrate hexahydrate, 120mg urea, 145.6mg cetyltrimethylammonium bromide, 25g deionized water, and ultrasonically stirred evenly;

[0056] The solution obtained by (4) is transferred to a 100ml reactor for reaction, and reacted for 6h at 160°C to generate basic cobalt carbonate;

[0057] The basic cobalt carbonate / carbon quantum dot solution obtained in (5) was centrifuged for 10min at a speed of 8000rmp, and the precipitate was taken;

[0058] The pre...

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Abstract

The invention discloses a preparation method of a cobaltosic oxide and carbon quantum dot composite material, which comprises the following steps: firstly, preparing carbon quantum dots: crushing disposable chopsticks into sawdust as a carbon source, adding deionized water, and carrying out hydrothermal reaction at 180 DEG C for 6 hours to obtain a carbon quantum dot solution. The preparation method of the cobaltosic oxide / carbon quantum dot composite material comprises the following steps: adding Co (NO3) 2.6 H2O into a treated carbon quantum dot solution, adjusting the ratio of carbon quantum dots to Co (NO3) 2.6 H2O, adding urea as a precipitator and hexadecyl trimethyl ammonium bromide as an active agent, and synthesizing the cobaltosic oxide / carbon quantum dot composite material. The method is simple in process, convenient to operate and low in cost and the defects of complex process, high cost and the like of an ORR oxygen evolution cathode catalyst in the prior art are overcome.

Description

technical field [0001] The invention relates to the technical field of electrocatalytic electrode materials, in particular to a method for preparing a composite material of tricobalt tetroxide and carbon quantum dots. Background technique [0002] The continuous consumption of fossil fuels has led to the gradual reduction of reserves, which will eventually lead to energy depletion, which prompts humans to look for other types of abundant new energy sources. Electrocatalysts for the oxygen evolution reaction play a vital role in various renewable energy applications and energy-intensive industries. The metal-air battery takes advantage of the advantages of the fuel cell. The oxygen in the air is used as the positive electrode active material, and the metal zinc (or aluminum) is used as the negative electrode active material. The oxygen in the air can continuously pass through the gas diffusion electrode to reach the electrochemical reaction interface. It reacts with metal zi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/88H01M4/90H01M4/9016Y02E60/50
Inventor 李生娟吉莹杜瓌鲁成龙王沈君薛裕华
Owner UNIV OF SHANGHAI FOR SCI & TECH
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