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Iron sesquioxide nanoring photocatalyst and preparation method thereof

A technology of ferric oxide and photocatalyst, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of easy recombination of photogenerated electron holes, etc. Achieve the effect of increasing reaction sites, reducing production costs and facilitating absorption

Inactive Publication Date: 2020-01-17
SHAOXING UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However TiO 2 The photocatalytic reaction requires ultraviolet light as an excitation light source, and ultraviolet light with a wavelength below 400nm only accounts for (3-5)% of the total energy of sunlight, and pure TiO 2 Photogenerated electron-holes generated under photoexcitation are easy to recombine, which limits the TiO 2 Applications in the field of photocatalysis

Method used

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  • Iron sesquioxide nanoring photocatalyst and preparation method thereof
  • Iron sesquioxide nanoring photocatalyst and preparation method thereof
  • Iron sesquioxide nanoring photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Accurately weigh 4mmol ferric chloride hexahydrate and disperse it in 20mL of absolute ethanol, and obtain a clear solution under the action of ultrasound. Slowly add 4mmol ionic liquid 1-butyl-3-methylimidazolium chloride [BMIM]Cl to the clear solution, stir vigorously for 30min, and then add 6mmol NaOH solid to it after it is fully dispersed, and continue magnetic stirring for 1h. The solution was transferred to a stainless steel autoclave lined with polytetrafluoroethylene (volume filling rate was 80%), and the autoclave was sealed. The autoclave was placed in an oven at 160° C. to react for 24 hours. After the reaction was completed, the autoclave was naturally cooled to room temperature. Centrifuge the product, wash it with deionized water and absolute ethanol for at least 5 times, and then place the product in a vacuum drying oven for 24 hours at 70°C to obtain Fe 2 o 3 nano ring.

[0032] XRD pattern ( figure 1 ) can be attributed to the hexagonal rhombic str...

Embodiment 2-27

[0037] Adopt the consumption of ionic liquid [BMIM] Cl in Table 1 and other experimental conditions, according to the preparation process described in embodiment 1, change ferric chloride hexahydrate, ionic liquid and reaction temperature and reaction time, can obtain required Fe equally 2 o 3 Nanoring photocatalysts.

[0038] Table 1 Fe under different conditions 2 o 3 Nanoring preparation

[0039]

[0040]

[0041] Structure the finished nanorings prepared in the above examples. This synthesis method is simple to operate, has good repeatability, is easy to control the reaction, and has high yield. Product verification and catalytic performance experiments can confirm that it also has a hexagonal structure and is a hollow nanoring structure. The size is uniform, the dispersion is good, the surface of the product is porous, and the crystallinity is good. As a photocatalyst, the experiment of degrading methyl orange solution and various reactive dye solutions can obtai...

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Abstract

The invention provides an iron sesquioxide nanoring photocatalyst and a preparation method thereof, belonging to the technical field of nanostructure manufacturing or treatment in material and surfacescience. The Fe2O3 nanoring photocatalyst is powder; the crystal phase of the Fe2O3 nanoring photocatalyst is of a hexagonal structure and belongs to a rhombohedral system; the morphology of the Fe2O3 nanoring photocatalyst is of a nanoring structure; a particle has an outer diameter of 400 nm and a wall thickness of 120 nm; and the thickness of a ring is 150 nm. The photocatalyst is applied to dye degradation, and has the advantages of simple preparation, good dispersibility, greatly improved efficiency in degradation of the industrial dye methyl orange and various reactive dyes, and the like.

Description

technical field [0001] The application relates to a nano-ring photocatalyst of ferric oxide and a preparation method thereof, belonging to the technical field of nanostructure manufacture or treatment for materials and surface science. Background technique [0002] With the introduction of photocatalytic degradation of organic pollutants in the 1970s, semiconductor photocatalysts have attracted extensive attention from researchers from various countries. Among many semiconductor photocatalysts, TiO 2 Due to the advantages of safety and non-toxicity, simple and easy synthesis method, and high photocatalytic efficiency, it has become the most widely studied nano-semiconductor photocatalytic material. However TiO 2 The photocatalytic reaction requires ultraviolet light as an excitation light source, and ultraviolet light with a wavelength below 400nm only accounts for (3-5)% of the total energy of sunlight, and pure TiO 2 Photogenerated electron-holes generated under photoex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J35/10C02F1/30
CPCB01J23/745C02F1/30C02F2101/308C02F2305/10B01J35/39B01J35/23B01J35/60
Inventor 陶菲菲兰明轩毛君
Owner SHAOXING UNIVERSITY
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