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Preparation method of clmton type visible light total water splitting catalyst

A catalyst, visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, oxygen preparation, etc., can solve the problems of insufficient utilization of solar energy, low efficiency of all-photon water splitting with visible light, etc., and achieve the promotion of photogenerated electrons and holes. The separation, total water splitting efficiency is high, and the preparation cost is low.

Inactive Publication Date: 2017-07-11
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a preparation method of a catalytic material for total visible light water splitting, so as to solve the problems of low efficiency of visible light full light water splitting and insufficient utilization of solar energy

Method used

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  • Preparation method of clmton type visible light total water splitting catalyst
  • Preparation method of clmton type visible light total water splitting catalyst
  • Preparation method of clmton type visible light total water splitting catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Put calcium chloride, lanthanum chloride, magnesium chloride, tantalum pentachloride and urea in a molar ratio of 3:3:2:4:200, accurately weigh them, and put them into methanol aqueous solution (alcohol-water volume ratio 1:1) and stir dissolve. Put the above-mentioned mixture into a large crucible and put it directly into a muffle furnace. The heating rate of the programmed temperature rise is 10 °C / min, the high temperature setting temperature is 800 °C, and the holding time of the high temperature stage is 4 h. After natural cooling, That is the precursor. The precursor was nitrided in an ammonia atmosphere, the nitriding temperature was 800 °C, and the time was 24 hours. After cooling, CLMTON powder was obtained. The purity of its products is not less than 99.81%, and the impurity content: carbon is less than 0.06%; chlorine is less than 0.11%. With CLMTON as the main catalyst, after stirring with 300 W xenon light for 24 hours (stirring speed 1000 rpm), the co-ca...

Embodiment 2

[0047] Calcium nitrate, lanthanum nitrate, magnesium nitrate, tantalum pentaethoxide and citric acid are in a molar ratio of 3:3:2:4:50, accurately weighed and put into methanol aqueous solution (alcohol-water volume ratio 1:1) Stir to dissolve. Put the above-mentioned mixture into a large crucible and put it directly into a muffle furnace. The heating rate of the programmed temperature rise is 10 °C / min, the high temperature setting temperature is 900 °C, and the holding time of the high temperature stage is 12 h. After natural cooling, That is the precursor. The precursor was nitrided in an ammonia atmosphere, the nitriding temperature was 1000°C, and the time was 4 hours. After cooling, CLMTON powder was obtained. The purity of its products is not less than 99.91%, and the impurity content: carbon is less than 0.05%; chlorine is less than 0.03%. With CLMTON as the main catalyst, after stirring with 300 W xenon light for 24 hours (stirring speed 1000 rpm), the co-catalyst ...

Embodiment 3

[0049] Take calcium nitrate, lanthanum nitrate, magnesium nitrate, tantalum pentachloride and citric acid in a molar ratio of 3:3:2:4:100, accurately weigh them and put them into methanol aqueous solution (volume ratio of alcohol to water: 1:1) and stir dissolve. Put the above-mentioned mixture into a large crucible and put it directly into a muffle furnace. The heating rate of the programmed temperature rise is 10 °C / min, the high temperature setting temperature is 800 °C, and the holding time of the high temperature stage is 8 h. After natural cooling, That is the precursor. The precursor was nitrided in an ammonia atmosphere, the nitriding temperature was 850 °C, and the time was 7 hours. After cooling, CLMTON powder was obtained. The purity of its products is not less than 99.89%, and the impurity content: carbon is less than 0.06%; chlorine is less than 0.03%. With CLMTON as the main catalyst, after stirring with 300 W xenon light for 24 hours (stirring speed 1000 rpm),...

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Abstract

The invention belongs to the technical field of preparation of inorganic non-metallic materials, and specifically relates to a preparation method of CLMTON type visible light total water splitting catalyst, which is to mix soluble calcium salt, soluble lanthanum salt, soluble magnesium salt, soluble tantalum salt and combustion auxiliary agent in methanol After being fully dissolved in the water mixed solution, the temperature is programmed directly in the muffle furnace to generate a combustion reaction, and it is kept at a high temperature for a certain period of time. After natural cooling, a precursor is formed, and then the precursor is subjected to high-temperature nitriding treatment to obtain CLMTON calcium Titanium type nitrogen oxide powder. Using CLMTON as the main catalyst, after stirring with light, the co-catalyst is first loaded, and then the nitrogen inhibitor is coated to make a visible light-responsive total water splitting catalyst. The invention has the advantages of high efficiency and stability, environmental friendliness, easy availability of raw materials, low cost, high catalytic total water splitting efficiency, etc., has visible light catalytic activity, can fully convert and utilize solar energy, and is 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 CLMTON type visible light total water splitting catalyst. Background technique [0002] With the progress and development of society, human beings have an increasing demand for energy, and energy issues will be a problem that modern humans have to face. At the same time, people are paying more and more attention to the environmental pollution and greenhouse effect caused by the use of fossil fuels, and there is a growing call for alternative energy sources, such as biomass energy, wind energy, and solar energy. Both solar energy and hydrogen energy are renewable, cheap and non-polluting energy sources, and they are very likely to be used as alternative energy sources in the future to solve the energy crisis. Therefore, developing stable and efficient catalysts that can use solar energy as a power sourc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C01B3/04C01B13/02
CPCY02E60/36Y02P20/133
Inventor 张杰许家胜
Owner BOHAI UNIV
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