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Preparation method for 1D/2D vertical Cds/MoS2 catalyst used for hydrogen production

A technology of catalysts and mixtures, applied in physical/chemical process catalysts, chemical instruments and methods, hydrogen/synthesis gas production, etc., can solve problems that are not conducive to photogenerated electron transport active sites, and achieve multiple reactive active sites, Promotes the separation of photogenerated electrons and holes and improves efficiency

Active Publication Date: 2017-02-01
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the prepared MoS 2 The nanosheets are tiled on the CdS nanowires, which is not conducive to the transport of photogenerated electrons and exposes more active sites

Method used

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  • Preparation method for 1D/2D vertical Cds/MoS2 catalyst used for hydrogen production
  • Preparation method for 1D/2D vertical Cds/MoS2 catalyst used for hydrogen production
  • Preparation method for 1D/2D vertical Cds/MoS2 catalyst used for hydrogen production

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The 1D / 2D vertical CdS / MoS of this embodiment 2 The preparation method of hydrogen production catalyst, the steps are as follows:

[0028] (1) Dissolve 69 mg (0.3 mmol) of cadmium acetate and 16 mg (0.5 mmol) of sulfur powder in 10 mL of ethylenediamine and mix to obtain a yellow mixture A. The concentration of cadmium acetate is 0.03 mol / L, and the concentration of sulfur powder The concentration is 0.05 mol / L;

[0029] (2) Put the yellow mixture A in a hydrothermal reaction kettle and heat it at 180°C for 5 hours to obtain sample B;

[0030] (3) Sample B was naturally cooled to room temperature, centrifuged, washed twice with ethanol, and dried at 60°C for 12 hours to obtain CdS nanowires;

[0031] (4) Dissolve 46 mg (0.19 mmol) sodium molybdate and 94 mg (1.23 mmol) thiourea (Mo / S molar ratio is 1:6.5) in 20 mL, 0.05 mol / L glucose solution and mix Uniformly, mixture C is obtained;

[0032] (5) Add 0.27 g of CdS nanowires prepared in step (3) to the mixture C in ste...

Embodiment 2

[0035] The 1D / 2D vertical CdS / MoS of this embodiment 2 The preparation method of hydrogen production catalyst, the steps are as follows:

[0036] (1) Dissolve 138 mg (0.6 mmol) of cadmium acetate and 32 mg (1.0 mmol) of sulfur powder in 20 mL of ethylenediamine and mix to obtain a yellow mixture A. The concentration of cadmium acetate is 0.03 mol / L, and the concentration of sulfur powder The concentration is 0.05 mol / L;

[0037] (2) Put the yellow mixture A in a hydrothermal reactor and heat it at 220°C for 3 hours to obtain sample B;

[0038] (3) Sample B was naturally cooled to room temperature, centrifuged, washed twice with ethanol, and dried at 80°C for 10 hours to obtain CdS nanowires;

[0039] (4) Dissolve 46 mg (0.19 mmol) sodium molybdate and 92 mg (1.23 mmol) thioacetamide (the molar ratio of Mo / S is 1:6.5) in 20 mL, 0.05 mol / L glucose solution and mixed uniformly to obtain mixture C;

[0040] (5) Add 2.97 g of CdS nanowires prepared in step (3) to the mixture C ...

Embodiment 3

[0043] The 1D / 2D vertical CdS / MoS of this embodiment 2 The preparation method of hydrogen production catalyst, the steps are as follows:

[0044] (1) Dissolve 207 mg (0.9 mmol) of cadmium acetate and 48 mg (1.5 mmol) of sulfur powder in 30 mL of ethylenediamine and mix to obtain a yellow mixture A. The concentration of cadmium acetate is 0.03 mol / L, and the concentration of sulfur powder The concentration is 0.05 mol / L;

[0045] (2) Put the yellow mixture A in a hydrothermal reactor and heat it at 200°C for 4 hours to obtain sample B;

[0046] (3) Sample B was naturally cooled to room temperature, centrifuged, washed twice with ethanol, and dried at 70°C for 11 hours to obtain CdS nanowires;

[0047] (4) Dissolve 37 mg (0.19 mmol) ammonium molybdate and 94 mg (1.23 mmol) thiourea (Mo / S molar ratio is 1:6.5) in 20 mL, 0.05 mol / L glucose solution and mix Uniformly, mixture C is obtained;

[0048] (5) Add 1.47 g of CdS nanowires prepared in step (3) to the mixture C in step (...

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Abstract

The invention discloses a preparation method for a 1D / 2D vertical Cds / MoS2 catalyst used for hydrogen production. The preparation method comprises the following steps: uniformly mixing cadmium acetate, sulfur powder ethylenediamine under stirring so as to obtain a yellow mixture A; placing the yellow mixture in a hydro-thermal reaction vessel and carrying out heating at 180 to 220 DEG C for 3 to 5 h so as to obtain a sample B; cooling the sample B and successively carrying out centrifugation, washing and drying so as to obtain a CdS nanowire; dissolving a molybdenum source and a sulfur source in a glucose solution and carrying out uniform mixing so as to obtain a mixture C; adding the CdS nanowire into the mixture C obtained in the previous step, carrying out uniform mixing under stirring, and carrying out heating in a hydro-thermal reaction vessel at 180 to 220 DEG C for 10 to 26 h so as to obtain a sample E; and naturally cooling the sample E to room temperature and successively carrying out centrifugation, washing and drying so as to obtain a Cds / MoS2 composite nanomaterial. MoS2 nanoflakes vertically growing on the CdS nanowire allows more active sites to be exposed and a faster electron transport rate to be obtained, thereby facilitating photocatalytic hydrogen production.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a hydrogen production catalyst CdS / MoS 2 Preparation methods of composite nanomaterials. Background technique [0002] In recent years, the energy crisis and environmental pollution caused by the combustion of fossil fuels have attracted widespread attention. This forces people to seek new energy sources that can replace fossil fuels to achieve sustainable development in the future. Hydrogen, as a clean and renewable energy source, has been considered as one of the best candidates. Among them, the use of solar energy to split water to produce hydrogen is a renewable energy hydrogen production technology that has attracted widespread attention. In the process of hydrogen production, the structure-activity relationship of catalysts and cocatalysts and the transport ability of hole-electron pairs have an important impact on the hydrogen production efficiency. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051C01B3/04
CPCC01B3/042B01J27/051C01B2203/1088C01B2203/1005B01J35/33B01J35/50B01J35/39Y02E60/36
Inventor 李玥王龙禄吴晓杰李孟阳高风仙陶雁忠丁晓波李会敏汤宁
Owner HENAN INST OF ENG
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