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Carbon nitride/molybdenum sulfide heterojunction nanomaterial and preparation method thereof

A technology of nanomaterials and molybdenum sulfide, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problem that the photoelectric conversion performance has not been significantly improved, and achieve rich coupling heterogeneous interfaces , Simple operation, good stability

Inactive Publication Date: 2018-12-04
XINYANG NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the preparation of carbon nitride / molybdenum sulfide materials and its application in photoelectrochemistry have been reported in the literature, but most of the prepared composite materials are simple structures of carbon nitride supported molybdenum sulfide particles. Combined together, its photoelectric conversion performance has not been significantly improved

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  • Carbon nitride/molybdenum sulfide heterojunction nanomaterial and preparation method thereof
  • Carbon nitride/molybdenum sulfide heterojunction nanomaterial and preparation method thereof
  • Carbon nitride/molybdenum sulfide heterojunction nanomaterial and preparation method thereof

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Embodiment 1

[0029] The preparation method of the carbon nitride / molybdenum sulfide heterojunction nanomaterial of this embodiment comprises the following steps:

[0030] 1) Put 5g of melamine into a muffle furnace, heat up to 530°C for 3 hours at a heating rate of 5°C / min and calcinate to obtain block carbon nitride; transfer 1g of block carbon nitride to 5mol / L nitric acid, Reflux at 120°C for 10 hours, wash with ultrapure water until neutral, and obtain graphite phase carbon nitride;

[0031] 2) Dissolve 1g of sodium molybdate and 0.8g of L-cysteine ​​in 50mL of ultrapure water, stir and mix evenly, transfer the mixture to a high-temperature reactor, react at 200°C for 30h, and wait for the product to cool to room temperature , washed with water and absolute ethanol three times, and dried at 65°C to obtain molybdenum sulfide nanosheets;

[0032] 3) Dissolve 0.0025g of graphite-phase carbon nitride and 0.05g of molybdenum sulfide in 25mL of methanol, stir with a magnetic stirrer at room...

Embodiment 2

[0034] The preparation method of the carbon nitride / molybdenum sulfide heterojunction nanomaterial of this embodiment comprises the following steps:

[0035] 1) Put 5g of melamine into a muffle furnace, heat up to 560°C for 3 hours at a heating rate of 8°C / min and calcinate to obtain block carbon nitride; transfer 1g of block carbon nitride to 4mol / L nitric acid, Reflux at 130°C for 12 hours, wash with ultrapure water until neutral, and obtain graphite phase carbon nitride;

[0036] 2) Dissolve 1g of sodium molybdate and 0.8g of L-cysteine ​​in 50mL of ultrapure water, stir and mix evenly, transfer the mixture to a high-temperature reaction kettle, and react at 200°C for 24h, and wait for the product to cool to room temperature , washed with water and absolute ethanol three times, and dried at 65°C to obtain molybdenum sulfide nanosheets;

[0037] 3) Dissolve 0.005g of graphite-phase carbon nitride and 0.05g of molybdenum sulfide in 25mL of methanol, stir with a magnetic stir...

Embodiment 3

[0039] The preparation method of the carbon nitride / molybdenum sulfide heterojunction nanomaterial of this embodiment comprises the following steps:

[0040] 1) Put 5g of melamine into a muffle furnace, heat up to 550°C for 4 hours at a heating rate of 10°C / min and calcinate to obtain block carbon nitride; transfer 1g of block carbon nitride to 5mol / L nitric acid, Reflux at 125°C for 12 hours, wash with ultrapure water until neutral, and obtain graphite phase carbon nitride;

[0041] 2) Dissolve 0.5g sodium molybdate and 0.8g L-cysteine ​​in 80mL ultrapure water, stir and mix evenly, transfer the mixture to a high-temperature reactor, react at 180°C for 24h, and wait for the product to cool to room temperature Finally, wash with water and absolute ethanol three times respectively, and dry at 60°C to obtain molybdenum sulfide nanosheets;

[0042] 3) Dissolve 0.0075g of graphitic carbon nitride and 0.05g of molybdenum sulfide in 25mL of methanol, stir with a magnetic stirrer at...

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Abstract

The invention relates to a carbon nitride / molybdenum sulfide heterojunction nanomaterial and a preparation method thereof. The preparation method of the carbon nitride / molybdenum sulfide heterojunction nanomaterial includes the steps of: 1) calcining melamine at 530-560DEG C for 3-5h to obtain carbon nitride; putting the carbon nitride in nitric acid for refluxing at 120-130DEG C for 10-12h, and conducting washing and drying to obtain graphite phase carbon nitride; 2) dissolving sodium molybdate and L-cysteine in water, then carrying out reaction at 180-200DEG C for 24-30h, and conducting cooling, washing and drying to obtain molybdenum sulfide nanosheets; and 3) mixing the graphite phase carbon nitride prepared in step 1), the molybdenum sulfide nanosheets prepared in step 2) and methanol, performing stirring at room temperature for 24-28h, and then conducting centrifugation and drying. The preparation method of the carbon nitride / molybdenum sulfide heterojunction nanomaterial provided by the invention has the advantages of simple operation, short time, low cost, good reproducibility, etc.

Description

technical field [0001] The invention relates to a carbon nitride / molybdenum sulfide heterojunction nano material and a preparation method thereof. Background technique [0002] Two-dimensional layered graphitic carbon nitride has the advantages of non-toxicity, low cost, high photocatalytic activity, narrow band gap, good chemical stability and thermal stability, etc., and is widely used in photocatalysis, sensing, metal Ionic degradation and other fields. However, due to the weak light absorption ability of carbon nitride and the easy recombination of photogenerated electron-hole pairs, its wide application is greatly limited. In order to solve this problem, researchers have made unremitting efforts to improve the photoelectric conversion performance of nitrogen carbide. [0003] As a typical two-dimensional transition metal chalcogenide, molybdenum sulfide has attracted extensive attention because of its large specific surface area, good electrical conductivity, and narr...

Claims

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Application Information

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IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/19B01J35/23B01J35/39
Inventor 曹俊涛刘洋马燕刘彦明王辉
Owner XINYANG NORMAL UNIVERSITY
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