Visible light response photocatalyst and preparation method thereof

A photocatalyst, visible light technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. The effect of proportioning and reducing energy consumption

Inactive Publication Date: 2015-04-15
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is replaced by other alkali metal ions, and its stability has not been significantly improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Silver nitrate, copper oxide, niobium pentoxide and tantalum pentoxide were 0.8 Ta 0.2 o 4 Put into the autoclave after weighing, take potassium hydroxide as the mineralizer, the substance ratio of silver nitrate and potassium hydroxide is 0.1, add the deionized water of corresponding volume in the autoclave according to the filling rate of 80%, Adjust the amount of raw materials so that the concentration of potassium hydroxide is 3 mol / L, stir slowly with a glass rod to dissolve potassium hydroxide; to 180 degrees Celsius, keep warm for 12 hours, and then cool with the furnace; take out and open the autoclave, pour the resulting product into a container, use deionized water to filter and wash repeatedly until the washing liquid becomes neutral, and put the obtained powder into an oven. Bake at 100°C for 5 hours. The dried powder was added to the simulated organic pollutant, which was prepared from methyl orange with a concentration of 20 mg / L, and the amount of the ...

Embodiment 2

[0018] Silver nitrate, copper oxide, niobium pentoxide and tantalum pentoxide were 0.1 Ta 0.9 o 4 Put into the autoclave after weighing, take potassium hydroxide as the mineralizer, the substance ratio of silver nitrate and potassium hydroxide is 0.5, add the deionized water of corresponding volume in the autoclave according to the filling rate of 60%, Adjust the amount of raw materials so that the concentration of potassium hydroxide is 9 mol / L, stir slowly with a glass rod to dissolve potassium hydroxide; after sealing the autoclave, put it in an oven, and raise the temperature to 200 at a rate of 7 degrees Celsius per minute. Celsius, keep warm for 70 hours, and then cool with the furnace; take out and open the autoclave, pour the resulting product into the container, use deionized water to filter and wash repeatedly until the washing liquid becomes neutral, and put the obtained powder into the oven, at 80 degrees Celsius Bake for 4 hours. The dried powder was added to t...

Embodiment 3

[0020] Silver nitrate, copper oxide, niobium pentoxide and tantalum pentoxide were 0.5 Ta 0.5 o 4 Put into the autoclave after weighing, take potassium hydroxide as the mineralizer, the substance ratio of silver nitrate and potassium hydroxide is 0.08, add the deionized water of corresponding volume in the autoclave according to the filling rate of 86%, Adjust the amount of raw materials so that the concentration of potassium hydroxide is 7 mol / L, and slowly stir with a glass rod to dissolve potassium hydroxide; to 130 degrees Celsius, keep warm for 8 hours, and then cool with the furnace; take out and open the autoclave, pour the resulting product into the container, use deionized water to filter and wash repeatedly until the washing liquid becomes neutral, and put the obtained powder into the oven. Bake at 90°C for 15 hours. The dried powder was added to the simulated organic pollutant, which was prepared from methyl orange with a concentration of 20 mg / L, and the amount ...

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Abstract

The invention discloses a visible light response photocatalyst and a preparation method thereof. The preparation method comprises the steps of weighing analytically pure silver nitrate, copper oxide, niobium pentoxide and tantalum pentoxide according to AgCuNb1-xTaxO4 (wherein x is greater than or equal to 0 and less than or equal to 1) and placing into an autoclave, and using potassium hydroxide as a mineralizer to obtain a composite oxide with favorable visible light photocatalytic property through a hydro-thermal synthesis process. The visible light response photocatalyst has high visible light catalytic activity in dyeing water and favorable stability and can be recycled. The visible light response photocatalyst is simple in equipment, low in energy consumption and easy in popularization.

Description

technical field [0001] The invention relates to a visible light-responsive composite oxide photocatalyst and a preparation method thereof, belonging to the field of inorganic photocatalytic materials. Background technique [0002] Photocatalysis can realize the conversion of solar energy into chemical energy (such as photocatalytic water splitting to produce hydrogen), which is an important way to obtain new energy. The development of photocatalytic materials that can effectively absorb visible light (with a wavelength of 400-700nm) is a prerequisite for realizing efficient solar photocatalytic conversion. However, most photocatalytic materials have low visible light absorption. At present, many relatively stable photocatalysts have relatively large band gaps and can only respond in the ultraviolet region, but ultraviolet light only accounts for 3-4% of sunlight, and a large amount of visible light with a wavelength greater than 400nm, so the traditional TiO 2 Such photocat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J37/10C02F1/30C02F103/30
CPCY02W10/37
Inventor 姚毅林华曾鸿鹄
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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