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Solid solution catalyst for photocatalytic decomposition of water to produce hydrogen, and preparation method thereof

A technology of photocatalysis and water hydrogen production, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, hydrogen production, etc., can solve the problem of low efficiency of photocatalytic decomposition of water to produce hydrogen, meet the requirements of industrialization, improve separation efficiency, The effect of improving efficiency

Active Publication Date: 2016-02-03
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of low efficiency of photocatalytic decomposition of water to produce hydrogen existing in the zinc cadmium sulfide solid solution catalyst in the prior art, the present invention has carried out in-depth research on the mechanism of zinc cadmium sulfide solid solution photocatalytic decomposition of water to produce hydrogen, and has paid a lot of originality After labor, and then finished the present invention

Method used

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  • Solid solution catalyst for photocatalytic decomposition of water to produce hydrogen, and preparation method thereof
  • Solid solution catalyst for photocatalytic decomposition of water to produce hydrogen, and preparation method thereof
  • Solid solution catalyst for photocatalytic decomposition of water to produce hydrogen, and preparation method thereof

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Effect test

Embodiment 1

[0021] (1) get 0.404 gram of zinc acetate (purity=99.5%) and 0.106 gram of cadmium acetate (purity=99.5%) and put into 250 milliliters of beakers and stir 10 minutes together, then add the sodium sulfide of 0.829 gram under the stirring condition (purity=99.5%) 99.0%), continued stirring for 4 hours; then transferred to a reactor with polytetrafluoroethylene lining, the reactor was put into a 180-degree oven and reacted for 12 hours, then took out the reactor and allowed it to cool down naturally at room temperature;

[0022] (2) Wash and centrifuge the suspension obtained in step (1) reaction kettle with deionized water 4 times, then wash and centrifuge 2 times with ethanol (purity=99.9%), discard the supernatant and then place it under the condition of 80 degrees Celsius Dry for 12 hours; the product obtained after drying is the zinc cadmium sulfide solid solution Zn that we want to prepare. 0.75 Cd 0.25 S, detected as a pure phase zinc cadmium sulfide solid solution by X-r...

Embodiment 2

[0025] Steps (1)~(2) are with embodiment 1;

[0026] (3) Take the product obtained in step (2) and disperse it in 20 milliliters of deionized water under nitrogen protection, use an ultrasonic machine to sonicate for 30 minutes and then stir for 30 minutes, add 5 milliliters of 0.0046 mol / liter cobalt nitrate solution and continue to stir 2 hours;

[0027](4) Add 0.36 g of sodium borohydride (purity=99.5%) particles to step (3), then continue to stir for 5 hours, then wash and centrifuge 5 times with deionized water, then wash with ethanol (purity=99.9%) Centrifuge 2 times, discard the supernatant, and dry at 80 degrees Celsius for 12 hours to obtain a zinc-cadmium sulfide solid solution with elemental cobalt on the surface, which is the photocatalytic decomposition of water hydrogen production catalyst according to the present invention, that is, the mass of elemental cobalt accounts for 10% of the zinc-cadmium sulfide. The mass fraction of the solid solution is 1%, named: 1...

Embodiment 3

[0030] Steps (1)~(2) are with embodiment 1;

[0031] (3) Take the product obtained in step (2) and disperse it in 20 milliliters of deionized water under the protection of nitrogen, use an ultrasonic machine to sonicate for 30 minutes and then stir for 30 minutes. 2 hours;

[0032] (4) Add 0.36 g of sodium borohydride (purity=99.5%) particles to step (3), then continue to stir for 5 hours, then wash and centrifuge 5 times with deionized water, then wash with ethanol (purity=99.9%) Centrifuge 2 times, discard the supernatant, and dry at 80 degrees Celsius for 12 hours to obtain a zinc-cadmium sulfide solid solution with elemental nickel on the surface, which is the photocatalytic decomposition of water hydrogen production catalyst of the present invention, that is, the mass of elemental nickel accounts for 10% of the zinc-cadmium sulfide. The mass fraction of the solid solution is 1%, named: 1%Ni / Zn 0.75 Cd 0.25 S.

[0033] (5) the product in step (4) is mixed to form homog...

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Abstract

The invention relates to a solid solution catalyst with simple substances nickel and cobalt loaded surface and for photocatalytic decomposition of water to produce hydrogen, and a preparation method thereof, and belongs to the technical field of photocatalysts. The preparation method of the catalyst for high-efficiency photocatalytic decomposition of water to produce hydrogen comprises the following steps: dissolving copper acetate and zinc acetate in deionized water, adding sodium sulfide to form a solid solution precursor, adding the obtained precursor to a reaction kettle, reacting at a certain temperature for a period of time, washing the obtained product, and drying to obtain a product zinc cadmium sulfide; and loading metals nickel and cobalt on the surface of the zinc cadmium sulfide. The catalyst improves the reaction rate of hydrogen production through photocatalytic decomposition of water to 211417[mu]mol h<-1>g<-1> from 78130[mu]mol h<-1>g<-1> of pure zinc cadmium sulfide, and improves the performances above 2 times. The catalyst has industrial application in energy crisis solution, and is a new technical means for producing environmentally-friendly novel energy.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, and in particular relates to a novel solid solution catalyst for photocatalytic decomposition of water to produce hydrogen and a preparation method thereof, in which elemental nickel and cobalt are loaded on the surface of a zinc cadmium sulfide solid solution. Background technique [0002] Both zinc sulfide and cadmium sulfide are semiconductor materials with photocatalytic properties. They are rich in sources on the earth and relatively cheap. However, the efficiency of photocatalytic decomposition of water to produce hydrogen in both of them is very low. The photogenerated electrons and holes excited in the water have not been effectively separated, and most of them are recombined. The photogenerated electrons cannot be transferred to the protons in the water to generate hydrogen, which has caused a huge waste of light resources. [0003] In order to improve the performance of zinc sulf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C01B3/04
CPCY02E60/36
Inventor 张宗弢岳新政王润伟易莎莎
Owner JILIN UNIV
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