I-Doped BiOClBr photocatalyst and preparation method thereof

A photocatalyst and catalyst technology, applied in the field of photocatalytic materials, can solve the problems of low utilization rate of visible light, etc., and achieve the effect of neat stacking structure, orderly structure and good dispersion

Inactive Publication Date: 2013-08-21
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the defects of low utilization rate of visible light and separation of photogenerated electron-hole pairs in the existing BiOX (X=Cl, Br, I) monomer, and provides a BiOClBr photocatalyst with a three-dimensional structure doped with I

Method used

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  • I-Doped BiOClBr photocatalyst and preparation method thereof
  • I-Doped BiOClBr photocatalyst and preparation method thereof
  • I-Doped BiOClBr photocatalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] The preparation method of the BiOClBr photocatalyst with three-dimensional structure doping I: measure 60mL ethylene glycol solution, weigh Bi(NO) 3 2g, KCl0.5g, NaBr0.5g, KI0.5g, the weighed Bi(NO) 3, KCl, NaBr and KI were dissolved in ethylene glycol solution, stirred for 30 minutes, transferred the prepared solution to a polytetrafluoroethylene-lined autoclave, and reacted at 170°C for 8 hours. After the autoclave was cooled, the precipitate The sample was centrifuged and washed several times with absolute ethanol and distilled water, and the prepared sample was dried in a vacuum oven at 60 °C for 3 h to obtain the I-doped BiOClBr photocatalyst.

[0031] The photocatalytic performance test of the I-doped BiOClBr photocatalyst obtained by the above preparation method: put the above-mentioned 20 mg I-doped BiOClBr solid solution into 200 mL of 7.5 ppm RhB solution, firstly carry out 30 min of dark state adsorption, until the adsorption equilibrium, in the dark During ...

Embodiment 2

[0033] The preparation method of the BiOClBr photocatalyst with three-dimensional structure doping I: measure 65mL ethylene glycol solution, weigh Bi(NO) 3 2g, KCl0.375g, NaBr0.375g, KI0.75g, Bi(NO) 3 Dissolve it with KCl, NaBr, and KI into the ethylene glycol solution, and stir for 30 minutes. The prepared solution was transferred to a Teflon-lined autoclave, and reacted at 170°C for 9 hours. After the autoclave was cooled, the precipitate was centrifuged and washed several times with absolute ethanol and distilled water. The prepared The sample was dried in a vacuum oven at 60°C for 4 h to obtain the I-doped BiOClBr photocatalyst.

[0034] The photocatalytic performance test of the I-doped BiOClBr photocatalyst obtained by the above preparation method: put the above-mentioned 20 mg I-doped BiOClBr solid solution into 200 mL of 7.5 ppm RhB solution, firstly carry out 30 min of dark state adsorption, until the adsorption equilibrium, in the dark During the state adsorption p...

Embodiment 3

[0036] The preparation method of the BiOClBr photocatalyst with three-dimensional structure doping I: measure 70mL ethylene glycol solution, weigh Bi(NO) 3 2g, KCl0.3g, NaBr0.3g, KI0.6g, Bi(NO) 3 Dissolve it with KCl, NaBr, and KI into the ethylene glycol solution, and stir for 30 minutes. The prepared solution was transferred to a polytetrafluoroethylene-lined autoclave, and reacted at 170°C for 10 h. After the autoclave was cooled, the precipitate was centrifuged and washed several times with absolute ethanol and distilled water. The prepared The sample was placed in a vacuum oven at 60°C and dried for 5 hours to obtain the I-doped BiOClBr photocatalyst.

[0037] The photocatalytic performance test of the I-doped BiOClBr photocatalyst obtained by the above preparation method: put the above-mentioned 20 mg I-doped BiOClBr solid solution into 200 mL of 7.5 ppm RhB solution, firstly carry out 30 min of dark state adsorption, until the adsorption equilibrium, in the dark Durin...

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Abstract

The invention discloses an I-doped BiOClBr photocatalyst of a three-dimensional structure. The preparation method of the catalyst comprises the following steps of: putting glycol in which required amount of Bi(NO)3, KCl, NaBr and KI are dissolved at high temperature and high pressure for reaction, centrifugally separating solid products after the reaction, washing and drying the separated and purified solid products so as to obtain the expected product. Compared with the conventional BiOX(X=Cl, Br and I) monomer, the doped BiOClBr photocatalyst of the three-dimensional structure is beneficial to the generation of photoproduction electron-hole pairs and the increase of specific surface area and can more effectively increase the probability that a catalyst is contacted with decomposition dye, and moreover, the recycling of the catalyst is facilitated. The preparation method disclosed by the invention is simple in material, simple and convenient in process operation, free of complex synthesis equipment and low in cost.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and in particular relates to a BiOClBr photocatalyst doped with I, and also relates to a preparation method of the catalyst. Background technique [0002] With the high development of human civilization, environmental pollution and energy shortage have become major problems restricting the development of modern human beings. In the past few decades, human beings have begun to devote themselves to the development of new energy and the control of environmental pollution. The new clean energy - solar energy gradually being used by humans. In recent years, with the development of photocatalytic technology, many researchers have turned their focus to photocatalytic degradation of organic pollutants. However, the traditional photocatalyst TiO is considered to be the best 2 , its forbidden band width is as high as 3.2eV, and only ultraviolet light with a wavelength less than 387nm can excite it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/10
Inventor 姬广斌张兴淼张斌
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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