Preparation method of SLATON catalyst for catalyzing visual light to decompose water to prepare oxygen

A catalyst and water splitting technology, applied in chemical instruments and methods, physical/chemical process catalysts, hydrogen production, etc., can solve the problem of few transition metal nitrogen oxide photocatalysts, and achieve easy operation control, high purity, The effect of simple process route

Inactive Publication Date: 2014-12-10
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, few transition metal oxynitride photocatalysts with high activity in the visible region have been developed and developed.

Method used

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  • Preparation method of SLATON catalyst for catalyzing visual light to decompose water to prepare oxygen
  • Preparation method of SLATON catalyst for catalyzing visual light to decompose water to prepare oxygen
  • Preparation method of SLATON catalyst for catalyzing visual light to decompose water to prepare oxygen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Put strontium chloride, lanthanum chloride, aluminum chloride, tantalum pentachloride and urea in a molar ratio of 1:1:1:1:500, accurately weigh them and put them into methanol aqueous solution (volume ratio of alcohol to water is 1:1) Stir and dissolve in medium for more than 30 minutes. Put the above mixture into a large crucible and put it directly into a muffle furnace. The heating rate of the programmed temperature rise is 10 ℃ / min, the high temperature setting temperature is 800 ℃, and the holding time of the high temperature stage is 4 h. After natural cooling, the obtained Precursor. The precursor is nitrided in an ammonia atmosphere, the nitriding temperature is 850°C, and the time is 6 hours. After cooling, the SLATON powder is obtained. The purity of its products is not less than 99.71%, and the impurity content: carbon is less than 0.11%; chlorine is less than 0.09%. With SLATON as the main catalyst, the co-catalyst CoO is first loaded x , the loadi...

Embodiment 2

[0039] Put strontium nitrate, lanthanum nitrate, aluminum nitrate, tantalum pentachloride and citric acid in a molar ratio of 1:1:1:1:100, accurately weigh them and put them into methanol aqueous solution (alcohol-water volume ratio 1:1) and stir Dissolved for more than 30 minutes. Put the above mixture into a large crucible and put it directly into a muffle furnace. The heating rate of the programmed temperature rise is 10 ℃ / min, the high temperature setting temperature is 800 ℃, and the holding time of the high temperature stage is 4 h. After natural cooling, the obtained Precursor. The precursor is nitrided in an ammonia atmosphere, the nitriding temperature is 850°C, and the time is 6 hours. After cooling, the SLATON powder is obtained. The purity of its products is not less than 99.82%, and the impurity content: carbon is less than 0.13%; chlorine is less than 0.03%. With SLATON as the main catalyst, the co-catalyst CoO is first loaded x , the loading amount is 1...

Embodiment 3

[0041] Put strontium nitrate, lanthanum nitrate, aluminum nitrate, tantalum pentachloride and citric acid in a molar ratio of 1:1:1:1:50, accurately weigh them and put them into methanol aqueous solution (alcohol-water volume ratio 1:1) and stir Dissolved for more than 30 minutes. Put the above mixture into a large crucible and put it directly into a muffle furnace. The heating rate of the programmed temperature rise is 10 ℃ / min, the high temperature setting temperature is 800 ℃, and the holding time of the high temperature stage is 4 h. After natural cooling, the obtained Precursor. The precursor is nitrided in an ammonia atmosphere, the nitriding temperature is 850°C, and the time is 6 hours. After cooling, the SLATON powder is obtained. The purity of its products is not less than 99.86%, and the impurity content: carbon is less than 0.06%; chlorine is less than 0.01%. With SLATON as the main catalyst, the co-catalyst IrO is first loaded 2 , the loading amount is 0....

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Abstract

The invention discloses a preparation method of an SLATON catalyst for catalyzing visual light to decompose water to prepare oxygen. The preparation method comprises the steps of carrying out combustion reaction through direct temperature programming in a muffle furnace after sufficiently dissolving a soluble strontium salt, a soluble lanthanum salt, a soluble aluminum salt, a soluble tantalum salt and a combustion aid in a methanol and water mixed solution, keeping a high-temperature stage for a certain time, and naturally cooling to form a precursor; then, carrying out nitridation and high-temperature treatment on the precursor to obtain SLATON perovskite-type nitrogen oxide powder; and loading a catalyst promoter on SLATON serving as a main catalyst, and then, coating a nitrogen inhibitor through photodeposition to obtain a visual light responsive catalyst for photolyzing water to prepare hydrogen. The SLATON catalyst has the advantages of high efficiency, stability, environment friendliness, easily-obtained raw materials, low cost and high catalytic hydrogen preparation efficiency; and the SLATON catalyst has visual light catalytic activity and is capable of sufficiently converting and utilizing solar energy and easy to apply and popularize.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic materials, and in particular relates to a preparation method of a SLATON type visible light water splitting oxygen production catalyst. Background technique [0002] The use of solar photocatalytic water splitting to produce hydrogen is one of the ideal ways for human beings to fundamentally solve energy and environmental problems, which has attracted great attention of scientists from all over the world. However, many photocatalytic materials only respond to ultraviolet light. Since the N2p orbital energy level is lower than the O2p orbital energy level, most transition metal oxynitrides exhibit strong absorption in the visible region, which is a class of potential photocatalytic materials in the visible region. But so far, few transition metal oxynitride photocatalysts with high activity in the visible region have been developed and manufactured. [0003] Transiti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B3/04
CPCY02E60/36Y02P20/133
Inventor 许家胜张杰
Owner BOHAI UNIV
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