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Co3S4 ultrathin nanosheet/rGO composite structure and preparation method and application thereof

A technology of composite structure and nanostructure, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as hindering agglomeration, reducing diffusion length, complex process, etc., to achieve strong charge transfer ability, The effect of increasing specific surface area and simple preparation process

Active Publication Date: 2018-02-23
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for non-layered compounds such as Co 3 S 4 , the general approach is not applicable due to the lack of an intrinsic driving force for intrinsic growth
Although it is currently possible to synthesize Co 3 S 4 nanosheets, but are relatively complex and need to be decomposed from Co by ion exchange method 3 o 4 or Co(OH) 2 Layered structure transformation, multi-step reaction leads to product loss, complex process is not conducive to large-scale production; (2) hinders Co 3 S 4 The agglomeration of nanosheets; (3) minimize the diffusion length; (4) further increase the conductivity, the Co 3 S 4 Coupling with conductive materials can reduce the charge transfer resistance of the counter electrode and electrolyte cross-section, and improve the catalytic ability of the counter electrode

Method used

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  • Co3S4 ultrathin nanosheet/rGO composite structure and preparation method and application thereof
  • Co3S4 ultrathin nanosheet/rGO composite structure and preparation method and application thereof
  • Co3S4 ultrathin nanosheet/rGO composite structure and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0036] This embodiment includes the following steps:

[0037] (1)Co 3 S 4 Preparation of nanosheet structures:

[0038] 300mg cobalt chloride hexahydrate (CoCl 2 ·6H 2 O) Dissolve in a mixture of 80mL water and ethanol (1:1 by mass ratio), and stir for 10min. Then, after slowly adding 4.8mL ammonia water and stirring for 30min, add 189mg thioacetamide (C 2 h 5 NS, referred to as TAA) was stirred for 1 h. Then react in an autoclave at 180° C. for 24 h, cool naturally to room temperature, absorb the supernatant, wash the sample with water and ethanol, and finally freeze-dry to obtain the desired product S1.

[0039] (2)Co 3 S 4 Preparation of nanosheet / rGO composite structure:

[0040] Dissolve 50mg of graphene oxide ultrasonically in a mixture of 80mL of water and ethanol (mass ratio 1:1), add 300mg of cobalt chloride hexahydrate and stir for 10 minutes to dissolve, then slowly add 4.8mL of ammonia water dropwise and stir for 10 minutes After that, 189 mg TAA was add...

Embodiment 2

[0044] This embodiment includes the following steps:

[0045] (1)Co 3 S 4 Preparation of nanosheet structures:

[0046] 300mg cobalt chloride hexahydrate (CoCl 2 ·6H 2 O) Dissolve in a mixture of 80mL water and ethanol (1:1 by mass ratio), and stir for 20min. Then, slowly add 9.6mL ammonia water and stir for 20min, then add 189mg thioacetamide (C 2 h 5 NS) stirred for 1 h. Then react in an autoclave at 180° C. for 24 h, cool naturally to room temperature, absorb the supernatant, wash the sample with water and ethanol, and finally freeze-dry to obtain the desired product S2.

[0047] (2)Co 3 S 4 Preparation of nanosheet / rGO composite structure:

[0048] Dissolve 50mg of graphene oxide ultrasonically in a mixture of 80mL of water and ethanol (mass ratio 1:1), add 300mg of cobalt chloride hexahydrate and stir for 10 minutes to dissolve, then slowly add 9.6mL of ammonia water dropwise and stir for 10 minutes After that, 189 mg TAA was added and stirred for 30 min. Then...

Embodiment 3

[0052] (1)Co 3 S 4 Preparation of nanosheet structures:

[0053] 300mg cobalt chloride hexahydrate (CoCl 2 ·6H 2 O) Dissolved in 80mL water, stirred for 10min. Then, after slowly adding 4.8mL ammonia water and stirring for 30min, add 189mg thioacetamide (C 2 h 5 NS) stirred for 1 h. Then react in an autoclave at 180° C. for 24 h, cool naturally to room temperature, absorb the supernatant, wash the sample with water and ethanol, and finally freeze-dry to obtain the desired product S3.

[0054] (2)Co 3 S 4 Preparation of nanosheet / rGO composite structure:

[0055] 50mg of graphene oxide was ultrasonically dissolved in 80mL of water, and 300mg of cobalt chloride hexahydrate was added and stirred for 10 minutes to dissolve. Next, 4.8mL of ammonia water was slowly added dropwise. After stirring for 10 minutes, 189mg of TAA was added and stirred for 30 minutes. Then react in an autoclave at 180° C. for 24 h, cool down to room temperature naturally, wash with water and etha...

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Abstract

The invention discloses a Co3S4 ultrathin nanosheet / rGO composite structure and preparation method and application thereof. The preparation method comprises the steps of dissolving cobalt chloride hexahydrate in a solvent for stirring, adding ammonia water for reaction, adding thioacetamide for stirring, cooling to a room temperature after reaction in a high-pressure kettle, abandoning a supernatant, and cleaning a sample to obtain nanometer-structure Co3S4; and dissolving graphene oxide in the solvent with ultrasound, adding cobalt chloride hexahydrate for stirring and dissolution, dropwise and slowly adding the ammonia water, adding TAA and continuing to stir after stirring, naturally cooling to the room temperature after reaction in the high-pressure kettle, cleaning the product with water and ethyl alcohol, and freezing and drying the product for use. By addition of NH<3>.H2O and introduction of NH3 molecules, the morphology of the product is adjusted to be a two-dimensional sheet-shaped structure, and the specific area of the structure is expanded; with introduction of GO during the synthesis process, the Co3S4 nanosheet structure is dispersed, an agglomeration phenomenon of the sheet structure is prevented, and the catalytic activity, the electron transfer capability and the catalytic stability of the Co3S4 nanosheet are improved.

Description

technical field [0001] The present invention relates to a kind of composite nano functional material, especially a kind of Co 3 S 4 Ultrathin nanosheet / rGO composite structure, preparation method and application. Background technique [0002] The global energy crisis makes the development of new energy an urgent issue. Photovoltaic technology, which can convert clean and renewable solar energy into electricity, has been a hot research topic in recent years. Among them, the simple synthesis process and low consumption of sensitized solar cells have attracted the attention of researchers. A sensitized solar cell mainly includes a photoanode, a photosensitive material, a redox pair and a counter electrode. Due to Pt on I 3 - The excellent reduction performance makes it a good counter electrode material. However, its high cost limits its large-scale commercial production. Therefore, it is an important task to find low-cost electrode materials to replace Pt. [0003] In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20B82Y30/00
CPCB82Y30/00H01G9/2022Y02E10/542
Inventor 蒋童童吴明在
Owner ANHUI UNIVERSITY
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