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Photocatalytic water-splitting hydrogen production material CdS/Sr1.6Zn0.4Nb2O7 and preparation method thereof

A sr1.6zn0.4nb2o7, water splitting technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problem of easy recombination of photogenerated electrons and holes, low utilization rate of visible light, and preparation conditions Harsh and other problems, 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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Photocatalytic water-splitting hydrogen production material CdS/Sr1.6Zn0.4Nb2O7 and preparation method thereof
  • Photocatalytic water-splitting hydrogen production material CdS/Sr1.6Zn0.4Nb2O7 and preparation method thereof
  • Photocatalytic water-splitting hydrogen production material CdS/Sr1.6Zn0.4Nb2O7 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 1.5949 g (6 mmol) Nb 2 o 5 In a plastic beaker, add 10 ml of HF and place in a water bath at 80°C to dissolve until clear, add ammonia water dropwise to adjust the pH to greater than 9, age at 80°C for 2 hours, and purify with deionized water 3 to 4 times during this period. Suction filtration, washing and drying. Dissolve the dried sample in 7.5650 g (36 mmol) of citric acid solution, add 3 ml of hydrogen peroxide, and add 2.0316 g (96 mmol) of strontium nitrate and 0.7140 g (24 mmol) of zinc nitrate after the solution is clarified and 5.0434 g (24 mmol) of citric acid, stirred and dissolved in sol at 80°C, dried at 100°C, calcined at 900°C for 10 h, and ground to obtain Sr 1.6 Zn 0.4 Nb 2 o 7 powder.

Embodiment 2

[0019] Catalyst 10%CdS / Sr 1.6 Zn 0.4 Nb 2 o 7Synthesis. Weigh 2 g of the prepared Sr 1.6 Zn 0.4 Nb 2 o 7 Disperse the powder in 30 ml of water, stir evenly, add dropwise a solution made of 0.1149 g of cadmium acetate, ultrasonically disperse for 15 minutes, add dropwise a solution made of 0.0328 g of thiourea, ultrasonically disperse for 15 minutes, and put the resulting solution into a 100 ml container In a polytetrafluoroethylene reactor, put it into a muffle furnace at 150°C for hydrothermal reaction for 10 hours. The sample after the hydrothermal reaction is filtered, washed, dried and ground for many times to obtain the target catalyst.

Embodiment 3

[0021] Catalyst 20%CdS / Sr 1.6 Zn 0.4 Nb 2 o 7 Synthesis. Weigh 2 g of the prepared Sr 1.6 Zn 0.4 Nb 2 o 7 Disperse the powder in 30 ml of water, stir evenly, add dropwise a solution made of 0.2297 g of cadmium acetate, ultrasonically disperse for 15 minutes, add dropwise a solution made of 0.0656 g of thiourea, ultrasonically disperse for 15 minutes, and put the resulting solution into a 100 ml container In a polytetrafluoroethylene reactor, put it into a muffle furnace at 150°C for hydrothermal reaction for 10 hours. The sample after the hydrothermal reaction is filtered, washed, dried and ground for many times to obtain the target catalyst.

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Abstract

A photocatalytic decomposing water hydrogen production material CdS / Sr1.6Zn0.4Nb2O7 is a catalyst having a heterojunction structure formed by loading CdS on Sr1.6Zn0.4Nb2O7. The inventive catalyst is prepared by a hydrothermal method through sol gel. When a molar ratio of the CdS and the Sr1.6Zn0.4Nb2O7 is 3:7, the expression is 30%CdS / Sr1.6Zn0.4Nb2O7, and the catalytic effect of the material is best. Under the illumination of a 300 watt xenon lamp, Na2S / Na2SO3 is taken as a sacrifice reagent, the inventive material 30%CdS / Sr1.6Zn0.4Nb2O7 photocatalyzes and decomposes the water to produce the hydrogen without a co-catalyst of noble metal, and the efficiency is 645.7 mu mol.h<-1>.g<-1>. The photocatalytic decomposing water hydrogen production material of the invention has the advantages that: 1 the inventive catalyst is directly synthesized by the hydrothermal method through sol gel, the operation is simple, the production cost is low, the synthetic yield is higher, the purity is high and the repeatability is good, and the inventive catalyst is suitable for the demand of magnification production; 2, the inventive catalyst is good in the stability and is easy to reuse; and 3, the inventive catalyst has higher photocatalytic hydrogen production efficiency.

Description

technical field [0001] The invention relates to a functional material and a preparation method thereof, in particular to a photocatalytic water splitting hydrogen production material and a preparation method thereof. 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 hy...

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 邢秋菊雷斯亮辛林花邹建平彭刘琪朱红允于雷孙益群
Owner NANCHANG HANGKONG UNIVERSITY
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