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Preparation method and use of tungsten oxide/bismuth oxybromide composite material

A technology of bismuth oxybromide and a composite material, applied in the field of nanomaterials, can solve the problems of low utilization rate of visible light, easy recombination of holes and electrons, etc., and achieves the effects of good cyclic stability, simple process, and environmental friendliness.

Active Publication Date: 2017-11-21
合肥九州龙腾科技成果转化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention is aimed at monomer Bi 24 o 31 Br 10 There are problems of low utilization rate of visible light and easy recombination of holes and electrons, and a simple WO 3 / Bi 24 o 31 Br 10 Preparation method of composite photocatalytic material

Method used

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  • Preparation method and use of tungsten oxide/bismuth oxybromide composite material
  • Preparation method and use of tungsten oxide/bismuth oxybromide composite material
  • Preparation method and use of tungsten oxide/bismuth oxybromide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 Bi 24 O 31 Br 10 Preparation

[0027] Weigh 0.97g of bismuth nitrate pentahydrate in a beaker, add 10mL of ethylene glycol, ultrasonic and stir for 30min to fully dissolve; weigh 0.196g of ammonium bromide in another beaker, add 25mL of deionized water to it, Stir for 20 minutes to dissolve; mix the two solutions and stir for 20 minutes to obtain a white suspension; then add 1.2 mL ethanolamine and continue stirring for 20 minutes; then transfer the resulting suspension to a 50 mL reactor lined with polytetrafluoroethylene , Put it in an oven at 160℃ to react for 12h; after it is naturally cooled to room temperature, the solid is centrifuged out, washed with deionized water and absolute ethanol 3 times, centrifuged and dried at 60℃. Take it out and grind it to powder with a mortar for use.

Embodiment 2

[0028] Example 2 WO 3 Preparation

[0029] Weigh 0.5g sodium tungstate dihydrate and 0.3g citric acid monohydrate in a beaker, add 30mL deionized water and stir for 20min until completely dissolved, add 6mol L dropwise -1 Adjust the pH of the solution to 1 with the hydrochloric acid solution, continue to stir for 1 hour until a yellow suspension is obtained, and then transfer the resulting suspension to a 50 mL reactor, and place it in an oven for hydrothermal reaction at 120°C for 12 hours; after it is naturally cooled to room temperature , Wash with deionized water and absolute ethanol 3 times, centrifuge and dry at 60℃. Take it out, grind it to powder with a mortar, transfer it to a semi-closed crucible, and then transfer it to a temperature-programmed tube furnace for calcination at 500°C for 2h.

Embodiment 3

[0030] Example 3 5%-WO 3 / Bi 24 O 31 Br 10 Preparation of composite materials

[0031] Weigh 0.0053g WO 3 And 0.1g Bi 24 O 31 Br 10 The powder was dissolved in 20mL and 60mL of deionized water respectively, and then sonicated and stirred in an ultrasonic cleaning machine for 30 minutes to make them uniformly dispersed; then WO 3 Suspension 2 and Bi 24 O 31 Br 10 The suspension 1 was mixed and stirred for 12h. Finally, the suspension 3 was transferred to a 100mL reactor and placed in an oven for hydrothermal reaction at 160℃ for 12h; after it was naturally cooled to room temperature, deionized water and absolute ethanol were used Washed 3 times, centrifuged and dried at 60°C.

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Abstract

The invention belongs to the field of nano-materials, and relates to a preparation method of a tungsten oxide / bismuth oxybromide composite material. The method comprises the following steps: weighing a certain amount of Bi24O3Br10 powder, adding a certain amount of deionized water, and carrying out ultrasonic treatment and stirring to uniformly disperse the powder in order to obtain a suspension 1; weighing a certain amount of WO3 powder, adding a certain amount of deionized water, and carrying out ultrasonic treatment and stirring to uniformly disperse the WO3 powder in order to obtain a suspension 2; mixing the two suspensions, and stirring the suspensions for 8-12 h to obtain a suspension 3; transferring the suspension 3 into a reaction kettle provided with a polytetrafluoroethylene liner, placing the reaction kettle in an oven, and carrying out a hydrothermal reaction; and naturally cooling the reaction kettle to room temperature, centrifuging the obtained reaction product to obtain a yellow solid precipitate, washing the precipitate, drying the washed precipitate, taking out the dried precipitate, and grinding the precipitate in a mortar to form powder for later use. The above prepared composite photocatalyst can effectively catalyze the degradation of an antibiotic tetracycline hydrochloride under visible light irradiation, and has a potential application prospect in antibiotic wastewater treatment.

Description

Technical field [0001] The invention belongs to the field of nano materials, and relates to a preparation method of a tungsten oxide / bismuth bromoxide composite material, in particular to a composite material with simple preparation process, stable product performance, and good photocatalytic degradation performance of organic pollutants and the same Preparation method and use. Background technique [0002] Antibiotics are one of the most commonly used drugs, but improper treatment of antibiotic-containing wastewater has caused serious water pollution and endangered human health. Tetracycline hydrochloride (TC) is one of the most widely used antibiotics, it can help people resist bacterial infections. In recent years, the treatment of TC in wastewater has always been the focus of attention, because in traditional biological treatment methods, TC is difficult to be degraded, and it will gradually accumulate in the ecological environment, destroy the ecosystem, and lead to antibio...

Claims

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Application Information

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IPC IPC(8): B01J27/132C02F1/30C02F101/38
CPCC02F1/30B01J27/132C02F2101/38C02F2305/10C02F2305/08B01J35/39
Inventor 马晓东陈敏姜德立马婉霞
Owner 合肥九州龙腾科技成果转化有限公司
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