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Material CdS/Ba0.4Sr0.6TiO3 for producing hydrogen by photocatalytically decomposing water and preparation method thereof

A water splitting and photocatalytic technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as easy recombination of photogenerated electrons and holes, low utilization rate of visible light, harsh preparation conditions, etc. , to achieve the effect of easy reuse, low production cost and simple operation

Active Publication Date: 2015-04-08
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

However, this photocatalyst is not ideal in practical applications, and has disadvantages such as low utilization rate of visible light, difficult recovery, harsh preparation conditions, and easy recombination of photogenerated electrons and holes.

Method used

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  • Material CdS/Ba0.4Sr0.6TiO3 for producing hydrogen by photocatalytically decomposing water and preparation method thereof
  • Material CdS/Ba0.4Sr0.6TiO3 for producing hydrogen by photocatalytically decomposing water and preparation method thereof
  • Material CdS/Ba0.4Sr0.6TiO3 for producing hydrogen by photocatalytically decomposing water and preparation method thereof

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Embodiment Construction

[0014] Synthesis of catalyst material of the present invention:

[0015] Disperse 4 mmol (1.0454 g) of barium nitrate and 6 mmol (1.2698 g) of strontium nitrate in 25 ml of 2 mol / L sodium hydroxide solution, and stir for 30 minutes to obtain A solution. Then 10 mmol (3.4 mL) of tetra-n-butyl titanate was dissolved in 5 mL of absolute ethanol, and stirred evenly to obtain B solution. Solution B was poured into solution A stirred in an ice-water bath, and solution C was obtained after stirring for 30 minutes. Dissolve 4 mmol (1.0661 g) of cadmium acetate in 5 mL of deionized water, slowly add it dropwise to solution C, and obtain solution D after ultrasonic dispersion for 15 minutes. Dissolve 4 mmol (0.9607 g) of sodium sulfide in 5 ml of deionized water, slowly add it dropwise to solution D, and ultrasonically disperse for 15 minutes. The above solution was put into a 100 ml polytetrafluoroethylene reaction kettle, and put into a muffle furnace at 200° C. for hydrothermal rea...

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Abstract

The invention relates to a material CdS / Ba0.4Sr0.6TiO3 for producing hydrogen by photocatalytically decomposing water, which is a heterostructure catalyst formed by supporting CdS onto Ba0.4Sr0.6TiO3. The catalyst is prepared by a one-step hydrothermal process. When the mole ratio of the CdS to the Ba0.4Sr0.6TiO3 is 0.4:1, the expression is 40%CdS / Ba0.4Sr0.6TiO3, and the material has the optimal catalytic effect. Under simulated sunlight, by using Na2S / Na2SO3 as a sacrifice reagent, the hydrogen production efficiency by photocatalytically decomposing water of the 40%CdS / Ba0.4Sr0.6TiO3 is up to 1268.4 mu mol.h<-1>.g<-1> under the condition of no noble metal for cocatalysis. The one-step hydrothermal process is directly used for synthesizing the catalyst, is simple to operate, has the advantages of low production cost, higher synthesis yield, higher purity and favorable repetitiveness, and is suitable for the requirement for scale-up production; the catalyst has high stability and is convenient for reutilization; and the catalyst has very high photocatalytic hydrogen production ratio under simulated sunlight.

Description

technical field [0001] The invention relates to a novel photocatalytic water decomposition hydrogen production material CdS / Ba 0.4 Sr 0.6 TiO 3 and its preparation method. Background technique [0002] Energy is the basis of human activities and the material premise of the development of human society. Compared with traditional fossil energy (such as coal and petroleum), hydrogen energy is a clean energy source. It can be obtained from water, and the product of complete combustion is water. It will not cause any pollution to the environment and is the cleanest energy in the world. Although the technology of using natural gas, oil, coal and other fossil energy to produce hydrogen through thermochemical method is relatively mature, it is neither economical nor environmentally friendly, and the method of electrolyzing water consumes a lot of energy. If we can use renewable energy (Such as solar energy) decomposes water to produce hydrogen, then hydrogen can be called a real...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04C01B3/04
CPCY02E60/36
Inventor 邹建平雷斯亮罗胜联马俊黄智敏王玉华
Owner NANCHANG HANGKONG UNIVERSITY
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