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Preparing method for MoS2-CNT multi-level nano-structure electrolysis water hydrogen production material

A technology of nanostructure and electrolysis of water, which is applied in the direction of electrolysis process, electrolysis components, chemical instruments and methods, etc., can solve problems such as poor electrical conductivity, limited electron transport rate, catalytic performance barrier, etc., achieve rapid conduction, increase contact area, enhance the effect of contact

Active Publication Date: 2017-03-22
SOUTH CHINA AGRI UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] Molybdenum disulfide is a typical semiconductor material, and its poor conductivity limits the electron transport rate in the electrocatalytic hydrogen evolution reaction, which in turn becomes an obstacle to the improvement of its catalytic performance.
Nanocarbon materials (such as carbon nanotubes, graphene, etc.) have excellent electrical conductivity and extremely high specific surface area, these two properties are very important for MoS 2 The dispersion of catalyst active centers and the improvement of conductivity can play a very important role, but the current problem is how to make MoS 2 Can form effective hybrid materials with carbon nanomaterials

Method used

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  • Preparing method for MoS2-CNT multi-level nano-structure electrolysis water hydrogen production material
  • Preparing method for MoS2-CNT multi-level nano-structure electrolysis water hydrogen production material
  • Preparing method for MoS2-CNT multi-level nano-structure electrolysis water hydrogen production material

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preparation example Construction

[0028] A kind of MoS 2 -The preparation method of the CNT multilevel nanostructure electrolysis water hydrogen production material, comprising the following steps:

[0029] 1) Functionalization of multi-walled carbon nanotubes: acid oxidation treatment of carbon nanotubes to obtain functionalized carbon nanotubes;

[0030] 2) MoS 2 - Preparation of CNT: After mixing and dispersing alcohol-water mixed solvent and functionalized carbon nanotubes, adding ammonium molybdate and thiourea to react, and obtaining the product after separation and washing.

[0031] Preferably, in step 1), the acid oxidation treatment is to mix carbon nanotubes with acid, then add an oxidant to react, and obtain functionalized carbon nanotubes after washing, dispersing and drying.

[0032] Preferably, in step 1), the acid is one of concentrated sulfuric acid or a mixed acid composed of concentrated sulfuric acid and concentrated nitric acid in a volume ratio (1~3): 1; further preferably, in step 1), t...

Embodiment 1

[0049] Example 1 (MoS 2 - Preparation of CNT-60):

[0050] Functionalization of multi-walled carbon nanotubes: 1 g of carbon nanotubes (Flotube 9110, CNano, diameter 10-15 nm, the same below) and 23 mL of concentrated sulfuric acid were added to a 250 mL Erlenmeyer flask, and stirred overnight at room temperature. Subsequently, place in a water bath and heat to 40 °C, add 200 mg NaNO 3 , and stirred for 5 minutes to completely dissolve it. Add 1g KMnO 4 , and keep the reaction temperature below 45°C, and stir for 30min. Then 3 mL of water was added, after 5 min, another 3 mL was added, and after another 5 min, 40 mL of water was added. After 15 min, remove the Erlenmeyer flask from the water bath, and add 140 mL of water and 10 mL of 30% H 2 o 2 . After stirring at room temperature for 5 min, the reaction product was repeatedly washed with 5 wt% hydrochloric acid and distilled water, dispersed in 10 mL of water, and freeze-dried to obtain about 1 g of functionalized car...

Embodiment 2

[0052] Example 2 (MoS 2 - Preparation of CNT-70):

[0053] Functionalization of multi-walled carbon nanotubes: Add 1 g of carbon nanotubes and 23 mL of concentrated sulfuric acid into a 250 mL Erlenmeyer flask, and stir overnight at room temperature. Subsequently, place in a water bath and heat to 40 °C, add 200 mg NaNO 3 , and stirred for 5 minutes to completely dissolve it. Add 1g KMnO 4 , and keep the reaction temperature below 45°C, and stir for 30min. Then 3 mL of water was added, after 5 min, another 3 mL was added, and after another 5 min, 40 mL of water was added. After 15 min, remove the Erlenmeyer flask from the water bath, and add 140 mL of water and 10 mL of 30% H 2 o 2 . After stirring at room temperature for 5 min, the reaction product was repeatedly washed with 5 wt% hydrochloric acid and distilled water, dispersed in 10 mL of water, and freeze-dried to obtain about 1 g of functionalized carbon nanotubes.

[0054] MoS 2 - Preparation of CNT: Add 30 mg o...

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Abstract

The invention discloses a preparing method for a MoS2-CNT multi-level nano-structure electrolysis water hydrogen production material. The method comprises the following steps that firstly, a multi-walled carbon nanotube is subjected to functionalization, the carbon nanotube is subjected to acid oxidation treatment, and the functionalization carbon nanotube is obtained; secondly, MoS2-CNT preparing is conducted, after an alcohol-water mixing solvent and the functionalization carbon nanotube are mixed and dispersed, ammonium molybdate and thiourea are then added for the reaction, and a product is obtained after separating and washing. Through coordinated regulation and control of a multi-level three-dimensional structure and interphase interaction, reasonable construction and comprehensive optimization of a MoS2-CNT electrocatalyst structure are achieved, efficient electro-catalysis hydrogen evolution reaction performance with commercialization prospects is obtained, and a new thought is provided for improving catalytic activity of different kinds of electrocatalysts through the multi-level structure and interphase connection regulation and control strategy.

Description

technical field [0001] The present invention relates to a kind of MoS 2 -Preparation method of CNT multi-level nanostructure electrolysis water hydrogen production material. Background technique [0002] Molybdenum disulfide is a typical semiconductor material, and its poor conductivity limits the electron transfer rate in the electrocatalytic hydrogen evolution reaction, which in turn becomes an obstacle to the improvement of its catalytic performance. Therefore, a lot of research focuses on how to improve the MoS 2 Regarding the conductivity of electrocatalysts, there are three different schemes: (1) Configuration regulation. MoS 2 There are three different configurations, 1T, 2H and 3R. Among them, the most stable configuration is 2H-MoS 2 , is an indirect bandgap semiconductor, but it can be transformed into metallic 1T-MoS when it is stripped by lithium intercalation 2 . However, due to the harsh reaction conditions, the 1T configuration of MoS 2 Both thermal st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04B01J27/051
CPCB01J27/051C25B1/04C25B11/051C25B11/057C25B11/075Y02E60/36
Inventor 刘英菊林锐杰黄浩量黄伟豪黄俊颖林嘉栋
Owner SOUTH CHINA AGRI UNIV
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