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Method for preparing BiOCl micro-flower nanometer photocatalysis material

A catalytic material and nano-light technology, applied in the field of nano-photocatalysis, can solve problems such as no preparation method is given, and achieve the effects of being conducive to large-scale engineering preparation, size increase, and simple process

Inactive Publication Date: 2013-02-06
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these literatures have not reported that the surface contains such a high content of active crystal faces (about 98%) and has high sensitized degradation activity under visible light (144 times faster than the sensitized degradation rate of commercial P25), micron-scale nano-assembled photocatalytic materials
And there is no relatively simple and effective preparation method

Method used

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  • Method for preparing BiOCl micro-flower nanometer photocatalysis material
  • Method for preparing BiOCl micro-flower nanometer photocatalysis material

Examples

Experimental program
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Effect test

Embodiment B

[0019] The preparation method of the BiOCl microflower nano-photocatalytic material in this embodiment is as follows:

[0020] Dissolve 0.8mmol of bismuth nitrate in 38ml of glycerol, and under stirring, add 2ml of the prepared potassium chloride (0.8mmol) aqueous solution dropwise into the bismuth nitrate solution, and the volume of glycerol in the resulting mixed solution The percentage is about 95%, and continue to stir for 10 minutes (minutes) and then sonicate for 30 minutes; transfer the above mixed solution to a high-pressure reactor (lined with a capacity of 50ml), and seal it. Put the reaction kettle into an oven and keep it warm at 110°C for 9 hours (hours). Take out the reaction kettle and let it cool naturally in the air. After cooling to room temperature, the product was taken out, the BiOCl photocatalyst was collected by centrifugation, and the sample was washed with deionized water and ethanol, and the obtained sample was dried in air at 60°C.

[0021] The sha...

Embodiment 2

[0024] Dissolve 0.8mmol of bismuth nitrate in 37ml of glycerol, and under stirring, add 3ml of the prepared potassium chloride (0.8mmol) aqueous solution dropwise into the bismuth nitrate solution, and the volume of glycerol in the resulting mixed solution The percentage is about 92.5%, and continue to stir for 30 minutes and then sonicate for 5 minutes; transfer the above mixed solution to a high-pressure reactor (liner capacity is 50ml), and seal it. Put the reaction kettle into an oven and keep it warm at 140°C for 6h. Take out the reaction kettle and let it cool naturally in the air. After cooling to room temperature, the product was taken out, the BiOCl photocatalyst was collected by centrifugation, and the sample was washed with deionized water and ethanol, and the obtained sample was dried at room temperature.

[0025] The microstructure of the above-obtained BiOCl microflower nano photocatalytic material is similar to that of Example 1. Through low-magnification scann...

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Abstract

The invention relates to a method for preparing a BiOCl micro-flower nanometer photocatalysis material. The method comprises the following steps of: (1) dissolving bismuth nitrate into glycerol; (2) preparing an aqueous solution of potassium chloride, and fully mixing the solution obtained in the previous step with the aqueous solution of potassium chloride; (3) performing hydrothermal treatment; and (4) filtering and drying to obtain the BiOCl micro-flower nanometer photocatalysis material. The photocatalysis material is synthesized through a simple synthetic method by using a nontoxic reagent, so that the requirement of environmental friendliness is met; and the proportion of water to glycerol is controlled in a hydrothermal system, so that the sizes of BiOCl nanosheets in a direction [001] are reduced, the two-dimensional size of a (001) crystal surface is increased, and the proportion of the (001) crystal surface in the surface of an obtained catalyst is increased. The method has the advantages of one-step completion, simple and convenient process, low reagent price and contribution to engineering large-scale preparation.

Description

technical field [0001] The invention relates to a preparation method of a micron-scale nano-assembled photocatalyst whose surface contains a large number of highly active crystal planes, and belongs to the technical field of nano-photocatalysis. Specifically, it is a preparation method of BiOCl microflower nanometer photocatalytic material. Background technique [0002] The photocatalytic reaction composed of photocatalyst is a low-energy, green and sustainable technology that can be applied to air purification and water pollution treatment. At present, the inorganic semiconductor photocatalyst, titanium dioxide, is the most typical representative. But the catalyst can only absorb ultraviolet light and has no response to visible light, and ultraviolet light only accounts for about 5% of the solar spectrum, most of which are visible light [D.H.Wang, L.Jia, X.L.Wu, L.Q.Lu, A.W.Xu, Nanoscale 2012, 4,576–584.]. Therefore, it is necessary to utilize visible light to a great ex...

Claims

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Application Information

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IPC IPC(8): C01G29/00B82Y30/00
Inventor 汪冬红陈韦
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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