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Ni doping Cd*.Zn*.*S micrometre ball photocatalyst and preparation method

A photocatalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of photocatalyst hydrogen production activity decrease, conduction band decrease, etc., and achieve improved photocorrosion resistance , improved hydrogen production activity and good stability

Active Publication Date: 2008-04-09
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when a solid solution is formed, the valence band and conduction band of the photocatalyst change at the same time, and the conduction band decreases while the band gap narrows, which easily reduces the hydrogen production activity of the photocatalyst.

Method used

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  • Ni doping Cd*.Zn*.*S micrometre ball photocatalyst and preparation method
  • Ni doping Cd*.Zn*.*S micrometre ball photocatalyst and preparation method
  • Ni doping Cd*.Zn*.*S micrometre ball photocatalyst and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] 1) Weigh ZnSO 4 ·7H 2 O: 5.17g, 3CdSO 4 ·8H 2 O: 0.51g, thioacetamide: 1.50g, dissolved in 50mL deionized water to form a mixed solution;

[0027] 2) Transfer the mixed solution to a hydrothermal kettle, place it in an oven after sealing it completely, and keep it at 160°C for 8 hours;

[0028] 3) Take out the hydrothermal kettle, and cool to room temperature naturally;

[0029] 4) The product was washed several times with deionized water, then dried in a vacuum oven at room temperature, and finally ground to obtain Cd without Ni-doped 0.1 Zn 0.9 S photocatalyst.

Embodiment 2

[0031] 1) Weigh ZnSO 4 ·7H 2 O: 5.17g, 3CdSO 4 ·8H 2 O: 0.51g, Ni(NO 3 ) 2 ·6H 2 O: 0.0102g, thioacetamide: 1.50g, dissolved in 50mL deionized water to form a mixed solution;

[0032] 2) Transfer the mixed solution to a hydrothermal kettle, seal it completely and place it in an oven at 160°C for 8 hours;

[0033] 3) Take out the hydrothermal kettle, and cool to room temperature naturally;

[0034] 4) The product was washed several times with deionized water, then dried in a vacuum oven at room temperature, and finally ground. Cd with a Ni doping amount of 0.1wt% can be obtained 0.1 Zn 0.9 S photocatalyst, its particle shape is a microsphere composed of nanocrystals.

Embodiment 3

[0036] 1) Weigh ZnSO 4 ·7H 2 O: 5.17g, 3CdSO 4 ·8H 2 O: 0.51g, Ni(NO 3 ) 2 ·6H 2 O: 0.0203g, thioacetamide: 1.50g, dissolved in 50mL deionized water to form a mixed solution;

[0037] 2) Transfer the mixed solution to a hydrothermal kettle, seal it completely and place it in an oven at 160°C for 8 hours;

[0038] 3) Take out the hydrothermal kettle, and cool to room temperature naturally;

[0039] 4) The product was washed several times with deionized water, then dried in a vacuum oven at room temperature, and finally ground to obtain Cd with a Ni doping amount of 0.2wt%. 0.1 Zn 0.9 S photocatalyst, its particle shape is a microsphere composed of nanocrystals.

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Abstract

The invention discloses Ni-doped Cd0.1Zn0.9 S microsphere photocatalyst and the preparation method thereof, the particle shape of the produced photocatalyst is a microsphere formed by nanometer crystals, and the doping amount of Ni is 0.1 percent to 0.5 percent of the weight of the catalyst. The invention has the preparation method that zinc sulfate, cadmium sulfate, nickel nitrate, and thioacetamide are taken as raw materials to form mixed solution which is sealed in a hydrothermal caldron and then laid in a baking oven to be insulated, naturally cooled to the room temperature, a resultant is obtained through cleaning, drying, and grinding. The Ni-doped Cd0.1Zn0.9S microsphere photocatalyst is prepared by the invention, and the anti-surface oxidation capability in air and the photo-corrosion resistant capability in the photocatalytic reaction are evenly enhanced greatly. Because the particle of the photocatalyst is microsphere-shaped, the photocatalytic activity for photocatalytic water splitting into hydrogen of visible light of the catalyst is greatly enhanced, and the highest hydrogen production rate reaches 191.01 micromole / (g*h). The quantum efficiency reaches 6.77 percent at the 420 nm position. After Pt of 0.6 wt percent is loaded, the highest hydrogen production rate reaches 585.45 micromole / (g*h), which is three times than the hydrogen production rate when the Pt is not loaded. The quantum efficiency reaches 15.9 percent at the 420 nm position, the activity is high, and the stability is good.

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 decomposition hydrogen production technology using water as a raw material under the condition of simulating the visible light of the sun. Particularly related to a nickel (Ni) doped sulfur zinc cadmium Cd 0.1 Zn 0.9 S microsphere photocatalyst and preparation method thereof. Background technique [0002] Insufficient supply of conventional primary energy, shortage of liquid fuels, serious pollution caused by the use of fossil energy, CO 2 The pressure of emission reduction and the problem of energy consumption in rural and remote areas have made my country face multiple pressures, prompting people to look for new clean alternative energy sources. Vigorously strengthening the basic theoretical research on the conversion and utilization of renewable energy, and developing high-qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/049C01B3/04
CPCY02E60/364Y02E60/36
Inventor 郭烈锦张相辉敬登伟
Owner XI AN JIAOTONG UNIV
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