Preparation of common adulterate nano pipe photochemical catalyst material

A technology of photocatalytic materials and nanotubes, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve poor repeatability, low visible light activity, no wide Application and other issues, to achieve the effect of large specific surface area, strong visible light response, and high photocatalytic reaction efficiency

Inactive Publication Date: 2008-09-03
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the photocatalytic materials developed and developed by people so far have low utilization efficiency of sunlight, and most of them are only stable and effective in the ultraviolet region. In the solar spectrum, the ultraviolet light energy (below 400nm) is less than 5%, and the wavelength is Visible light energy of 400-750nm accounts for about 43% of solar energy
However, due to the TiO 2 After modification, there are still disadvantages such as low visible light activity and poor reproducibility, and it is not widely used at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Add 200ml of absolute ethanol, 15ml of glacial acetic acid, and 50ml of tetrabutyl titanate into a three-neck flask in sequence at room temperature, and stir thoroughly to prepare a tetrabutyl titanate ethanol solution. In another three-necked flask, add 10ml deionized water, 1g FeCl 3 , 100ml absolute ethanol, 10ml glacial acetic acid, fully stirred to make FeCl 3 Mix the solution. FeCl was mixed with vigorous stirring 3 Slowly add the mixed solution to the tetrabutyl titanate ethanol solution to make Ti 1-7.5y Fe y o 2 Sol.

[0019] 2) Put Ti first 1-7.5y Fe y o 2 The sol is dried at about 50°C to form a gel, and then dried at 110°C for 6 hours to completely remove water and ethanol. After grinding, it is roasted at 500°C for 3 hours to obtain Ti 1-7.5y Fe y o 2 powder.

[0020] 3) Put Ti 1-7.5y Fe y o 2 Add the powder into 10M NaOH solution, then put it into a closed reaction kettle to control the temperature to keep it at 80°C, keep it warm for 24 ...

Embodiment 2

[0023] 1) Add 200ml of absolute ethanol, 15ml of glacial acetic acid, and 50ml of tetrabutyl titanate into a three-neck flask in sequence at room temperature, and stir thoroughly to prepare a tetrabutyl titanate ethanol solution. In another three-necked flask, add 10ml deionized water, 2g Eu(NO 3 ) 3 , 100ml absolute ethanol, 10ml glacial acetic acid, fully stirred to make Eu(NO 3 ) 3 Mix the solution. Eu(NO 3 ) 3 Slowly add the mixed solution to the tetrabutyl titanate ethanol solution to make Ti 1-7.5y Eu y o 2 Sol.

[0024] 2) Put Ti first 1-7.5y Eu y o 2 The sol is dried at about 30°C to form a gel, and then dried at 100°C for 10 hours to completely remove water and ethanol. After grinding, it is roasted at 400°C for 5 hours to obtain Ti 1-7.5y Eu y o 2 powder.

[0025] 3) Put Ti 1-7.5y Eu y o 2 Add the powder into 12M NaOH solution, then put it into a closed reaction kettle to control the temperature to keep it at 120°C, keep it warm for 8 hours, and pre...

Embodiment 3

[0028] 1) Add 200ml of absolute ethanol, 2ml of hydrochloric acid, 50ml of TiCl to a three-necked flask at room temperature 4 , fully stirred to make titanium tetrachloride ethanol solution. In another three-necked flask, add 10ml deionized water, 2g Ce(NO 3 ) 3 , 100ml of absolute ethanol, 2ml of hydrochloric acid, fully stirred to make Ce(NO 3 ) 3 Mix the solution. Ce(NO 3 )3 Slowly add the mixed solution to the ethanol solution of titanium tetrachloride to make Ti 1-7.5y Ce y o 2 Sol.

[0029] 2) Put Ti first 1-7.5y Ce y o 2 The sol is dried at about 80°C to form a gel, and then dried at 120°C for 5 hours to completely remove water and ethanol. After grinding, it is roasted at 420°C for 4.5 hours to obtain Ti 1-7.5y Ce y o 2 powder.

[0030] 3) Put Ti 1-7.5y Ce y o 2 Add the powder into 8M NaOH solution, then put it into a closed reaction kettle to control the temperature to keep it at 90°C, keep it warm for 20 hours, and prepare Ti after neutralization an...

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PUM

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Abstract

The invention relates to a method for producing a visible-light responsive nanotube catalyst with binary synergistic effect for photocatalytic water splitting. The method includes the following steps: thoroughly mixing butyl titanate or TiCl4, anhydrous alcohol and an acid to obtain a solution, thoroughly mixing FeCl3, Fe(NO3)3, Eu(NO3)3 or Ce(NO3)3, deionized water, an acid and anhydrous alcohol to obtain a solution, mixing the two solutions to form a sol, drying the sol, calcining to obtain powders, adding the powders into the NaOH solution, placing in a sealed reaction vessel while controlling the reaction temperature, neutralizing and washing to obtain a single doped nanotube, calcining the single doped nanotube in the presence of nitrogen gas, to obtain a co-doped nanotube photocatalyst. Compared with the prior art, the inventive co-doped nanotube photocatalyst has the advantages of large specific surface area, good photoresponsive property and high photocatalytic efficiency.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photocatalysis, especially the technical field of visible light catalytic water splitting to produce hydrogen, and specifically relates to a preparation method of binary synergistic photocatalyst nanotubes with visible light response. technical background [0002] Due to the energy crisis (coal, oil and other natural energy sources will face the danger of depletion) and environmental problems (environmental pollution and greenhouse effect caused by the combustion of fossil fuels), people have to look for cleaner and renewable new energy sources to replace fossil fuels that are facing depletion. energy. As a secondary energy source, hydrogen energy has the characteristics of high combustion value, abundant reserves, and no pollution. It is undoubtedly the most promising new-generation energy source. How to use renewable resources to produce hydrogen should be the most important problem to be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J23/745B01J21/06B01J23/10B01J35/02C01B3/04
CPCY02E60/36
Inventor 殷好勇聂秋林
Owner HANGZHOU DIANZI UNIV
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