Platinum supported nitrogen-doped molybdenum disulfide photocatalyst and preparation method thereof

A technology of molybdenum disulfide and photocatalyst, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of molybdenum disulfide and hydrogen generation, etc. Achieve and stabilize hydrogen production capacity, good repeatability and simple operation

Active Publication Date: 2016-06-01
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Theoretically, molybdenum disulfide also has the ability to decompose water with visible light to produce hydrogen, but because the conduction band position of molybdenum disulfide is too low, it is too close to the reduction potential of water, and the photo

Method used

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  • Platinum supported nitrogen-doped molybdenum disulfide photocatalyst and preparation method thereof
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  • Platinum supported nitrogen-doped molybdenum disulfide photocatalyst and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0038] Example 1:

[0039] Step 1: At room temperature, mix 2.72g of sodium molybdate dihydrate (NaMoO) with a mass ratio of 1:2 4 ·2H 2 O) and 5.44g of thioacetamide were dissolved in 60mL of deionized water with stirring, the resulting mixed solution (concentration of sodium molybdate dihydrate is 45.3g / L, and thioacetamide is 90.7g / L) at room temperature After stirring for 6 hours, transfer to a hydrothermal reactor (filling degree 60%) equipped with polytetrafluoroethylene lining for hydrothermal reaction, and crystallize at 200℃ for 24 hours; after the hydrothermal kettle is cooled to room temperature, the resulting black precipitate Wash with deionized water and ethanol and vacuum dry at 50°C for 24 hours to obtain black powdered molybdenum disulfide nanosheets;

[0040] Step 2: Take the 0.3g molybdenum disulfide nanosheet powder obtained in step 1 and place it in a high-temperature tube furnace for high-temperature treatment. During the high-temperature treatment process, th...

Example Embodiment

[0046] Example 5

[0047] Step 1: At room temperature, mix sodium molybdate dihydrate (NaMoO) with a mass ratio of 1:1 4 ·2H 2 O) and thioacetamide were stirred and dissolved in deionized water in turn, the resulting mixed solution (concentration of sodium molybdate dihydrate is 40g / L, concentration of thioacetamide is 40g / L) was stirred at room temperature for 6h and then transferred to The hydrothermal reaction is carried out in a hydrothermal kettle (filling degree of 55%) equipped with polytetrafluoroethylene lining and crystallized at 205°C for 48 hours; after the hydrothermal kettle is cooled to room temperature, the resulting black precipitate is mixed with deionized water and Washing with ethanol and vacuum drying at 60°C for 42 hours to obtain black powdered molybdenum disulfide nanosheets;

[0048] Step 2: Take the 0.3g molybdenum disulfide nanosheet powder obtained in step 1 and place it in a high-temperature tube furnace for high-temperature treatment. During the high-t...

Example Embodiment

[0053] Example 6:

[0054] Step 1: At room temperature, mix sodium molybdate dihydrate (NaMoO) with a mass ratio of 1:3 4 ·2H 2 O) and thioacetamide were stirred and dissolved in deionized water in sequence, the resulting mixed solution (sodium molybdate dihydrate concentration of 50g / L, thioacetamide concentration of 150g / L) was stirred at room temperature for 6h and then transferred to Hydrothermal reaction is carried out in a hydrothermal kettle (filling degree of 65%) equipped with PTFE lining, and crystallized at 210°C for 42 hours; after the hydrothermal kettle is cooled to room temperature, the resulting black precipitate is mixed with deionized water and Ethanol washing and vacuum drying at 70°C for 36 hours to obtain black powdered molybdenum disulfide nanosheets;

[0055] Step 2: Take 0.3g of molybdenum disulfide nanoplate powder obtained in step 1 and place it in a high-temperature tube furnace for high-temperature treatment. During the high-temperature treatment process...

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Abstract

The invention provides a platinum supported nitrogen-doped molybdenum disulfide photocatalyst and a preparation method thereof. The method comprises the following steps: with sodium molybdate and thioacetamide as raw materials, preparing molybdenum disulfide nanoplates via a hydrothermal method; performing thermal treatment on the molybdenum disulfide nanoplates in an ammonia atmosphere to obtain nitrogen-doped molybdenum disulfide nanoplates; and finally, loading precious metal platinum on the nitrogen-doped molybdenum disulfide nanoplates via a photo reduction method to obtain the platinum supported nitrogen-doped molybdenum disulfide photocatalyst. With the platinum supported nitrogen-doped molybdenum disulfide photocatalyst, molybdenum disulfide is taken as a photocatalyst to produce hydrogen from water by visible light catalytic decomposition for the first time. The platinum supported nitrogen-doped molybdenum disulfide photocatalyst has excellent visible light catalytic hydrogen production capability and excellent stability. The preparation method is simple to operate, the photocatalyst is good in repeatability, and the application of molybdenum disulfide in the aspects of photocatalysis and electrochemistry is expanded.

Description

technical field [0001] The invention belongs to the field of hydrogen energy preparation, and relates to a photocatalytic clean preparation technology of hydrogen energy, that is, a photocatalytic hydrogen production technology using water as a raw material under the condition of simulating sunlight and visible light irradiation, and specifically relates to a nitrogen-doped molybdenum disulfide-supported platinum photocatalyst and its preparation method. Background technique [0002] In today's world, with the gradual depletion of traditional fossil energy such as oil, coal and natural gas, and the increasingly serious environmental problems, human beings are about to face the crisis of energy depletion. Therefore, the development of clean and renewable energy is a research direction that governments all over the world attach great importance to. New energy sources with development potential today include solar energy, geothermal energy, wind energy, ocean energy, nuclear e...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/04
CPCC01B3/042B01J23/42B01J27/24B01J35/004C01B2203/1082C01B2203/107Y02E60/36
Inventor 师进文张亚周胡逾超郭烈锦
Owner XI AN JIAOTONG UNIV
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