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A kind of heterogeneous structure catalyst and preparation method using solar energy to decompose water to produce hydrogen

A heterogeneous structure and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, hydrogen production, etc., can solve problems such as poor carrier mobility, and achieve separation and migration The effect of good surface penetration

Active Publication Date: 2021-11-09
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0005] Technical problem: The purpose of this invention is to provide a heterogeneous structure catalyst and preparation method that uses solar energy to decompose water to produce hydrogen, and solve the problem of ZnIn 2 S 4 Applied in the photocatalytic water splitting, the problem of easy recombination of photogenerated electron-hole pairs and poor carrier mobility; used to optimize ZnIn 2 S 4 performance, and make it use solar photocatalytic water splitting to produce hydrogen

Method used

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  • A kind of heterogeneous structure catalyst and preparation method using solar energy to decompose water to produce hydrogen
  • A kind of heterogeneous structure catalyst and preparation method using solar energy to decompose water to produce hydrogen
  • A kind of heterogeneous structure catalyst and preparation method using solar energy to decompose water to produce hydrogen

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preparation example Construction

[0043] The preparation method of the heterostructure catalytic material comprises the following steps:

[0044] Step 1. Preparation of SiO 2 , urea, nickel salt, deionized water mixed solution; the SiO 2 Disperse nanospheres into deionized water, then add urea and nickel salt and mix evenly to prepare mixed solution 1;

[0045] Step 2, transfer the mixed solution to a hydrothermal reaction kettle, and react at 105°C for 12h;

[0046] Step 3. After natural cooling, the product was washed with deionized water, centrifuged, and dried at 60°C to obtain SiO 2 @nickel silicate powder;

[0047] Step 4. Preparation of SiO 2 @nickel silicate, sodium sulfide, deionized water mixed solution; SiO 2 @nickelsilicate is dispersed in deionized water, adding sodium sulfide, and using NaOH solution to adjust the pH value of the solution to obtain mixed solution 2;

[0048] Step 5, transfer the mixed solution 2 to a hydrothermal reaction kettle, and react at 160°C for 12-20h;

[0049] Ste...

Embodiment 1

[0057] Example 1: 3.33 mmol SiO 2 , 16.65mmol urea and 0.557mmol Ni(NO 3 ) 2 .6H 2 O was dispersed in 40ml deionized water;

[0058] After mixing evenly, transfer to a hydrothermal reaction kettle and react at 105°C for 12 hours;

[0059] After natural cooling, the product was washed with deionized water-centrifuged 5 times, and dried at 60 °C to obtain SiO 2 @nickelsilicate powder;

[0060] 0.1g SiO 2 @nickel silicate dispersed in 40ml deionized water, add 1.29mmol Na 2 S·9H 2 O, fully mixed;

[0061] Use NaOH solution to adjust the pH of the solution to 13.4, then transfer to a hydrothermal reaction kettle, and react at 160°C for 18h;

[0062] After natural cooling, wash and centrifuge with deionized water for 4 times to collect the black precipitate, and vacuum dry at 60°C to obtain NiS hollow nanosphere powder;

[0063] Dissolve 0.474mmol NiS and 12mL glycerin in 40ml water and stir well;

[0064] Then add 1.6mmol ZnCl 2 , 1.6mmol InCl 3 4H 2 O and 3.2mmol TA...

Embodiment 2

[0074] Example 2: 13.3 mmol SiO 2 , 66.6mmol urea and 2mmol Ni(NO 3 ) 2 .6H 2 O was dispersed in 160ml deionized water;

[0075] After mixing evenly, transfer to a hydrothermal reaction kettle and react at 105°C for 12 hours;

[0076] After natural cooling, the product was washed with deionized water-centrifuged 5 times, and dried at 60 °C to obtain SiO 2 @nickelsilicate powder;

[0077] 0.2g SiO 2 @nickel silicate dispersed in 80ml deionized water, add 2.581mmol Na 2 S·9H 2 O, fully mixed;

[0078] Use NaOH solution to adjust the pH of the solution to 13.4, then transfer to a hydrothermal reaction kettle, and react at 160°C for 16h;

[0079] After natural cooling, wash and centrifuge with deionized water for 4 times to collect the black precipitate, and vacuum dry at 60°C to obtain NiS hollow nanosphere powder;

[0080] Dissolve 0.095mmol NiS and 2mL glycerin in water and stir well;

[0081] Then add 0.399mmol ZnCl 2 , 0.411mmol InCl 3 4H 2 O and 0.799mmol TAA; ...

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Abstract

The invention discloses a heterogeneous structure catalyst and a preparation method for decomposing water to produce hydrogen by using solar energy, and belongs to the preparation method of semiconductor photocatalytic materials. Steps: 1) SiO 2 Disperse the nanospheres in deionized water, add urea and nickel nitrate and mix evenly; 2) transfer the mixed solution to a hydrothermal reaction kettle, and react at 105°C for 12h; 3) after natural cooling, centrifuge and dry the product to obtain SiO 2 @nickel silicate powder; 4) SiO 2 Disperse @nickel silicate into deionized water, add sodium sulfide, and adjust the pH of the mixed solution with NaOH; 5) Transfer the mixed solution to a hydrothermal reaction kettle and react at 160°C for 12‑20h; 6) After natural cooling, centrifuge to collect the black Precipitation and vacuum drying to obtain NiS hollow nanosphere powder; 7) Dissolve NiS and glycerin in water, add zinc chloride, indium chloride and thioacetamide; 8) react the solution at 80°C for 2h under stirring; 9) After centrifugation, washing and drying, NiS@ZnIn was obtained 2 S 4 . Pros: NiS@ZnIn 2 S 4 Spherical heterostructures have large specific surface area, low density, good surface permeability and visible light response.

Description

technical field [0001] The invention relates to a preparation method of a semiconductor photocatalytic material, in particular to a heterogeneous structure catalyst and a preparation method for utilizing solar energy to decompose water to produce hydrogen. Background technique [0002] With the continuous development of the global economy, human demand for energy continues to grow, and the large-scale exploitation and use of traditional fossil fuels has brought about problems such as greenhouse effect and environmental pollution. As a high-energy-density energy source, hydrogen energy has many advantages such as cleanness, high efficiency, safety, storability, and transportability. It is expected to replace traditional fossil fuels as a new energy carrier. At present, the traditional hydrogen production methods mainly include: hydrogen production from coal, hydrogen production from natural gas, hydrogen production from methanol, and hydrogen production from electrolyzed wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/043B01J35/08C01B3/04
CPCB01J27/043B01J35/004B01J35/08C01B3/042C01B2203/0277C01B2203/1058C01B2203/1076Y02E60/36Y02P20/133
Inventor 顾修全吴凯李亚光
Owner CHINA UNIV OF MINING & TECH
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