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Method for enhancing photocatalytic performance of Bi2WO6 system based on electron beam radiation

A technology of electron beam radiation and photocatalysis, which is applied in the fields of radiation chemistry and photocatalytic material preparation, can solve problems such as stability and photocatalytic performance reduction, and achieve photocatalytic performance and catalytic efficiency improvement, excellent visible light photocatalytic performance, and simple process. Effect

Pending Publication Date: 2020-12-18
HUBEI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The above modification process involves re-reaction, solid-liquid separation, purification, solvent drying and other processes, and the catalysts of doping, deposition, and semiconductor composite modification may be affected by the environment during use, resulting in stability and light degradation. Reduced catalytic performance

Method used

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  • Method for enhancing photocatalytic performance of Bi2WO6 system based on electron beam radiation

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Take by weighing 1.9402g (4.0mmol) bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) and 0.6596g (2.0mmol) of sodium tungstate dihydrate (Na 2 WO 4 2H 2 O) Dissolve in 80ml of aqueous solution and perform ultrasonication for about 10min to accelerate the dissolution of the reactants. Stir and fully react for 20 minutes, and add 0.02 g of cetyltrimethylammonium bromide (CTAB) respectively, so that it can be completely dissolved. The mixed solution was transferred to a 100ml polytetrafluoroethylene-lined reactor, and placed in a high-temperature oven at 180°C for constant temperature reaction for 12 hours. After cooling to room temperature, collect the reaction precipitate in the reaction kettle into a centrifuge tube, put it into a centrifuge for centrifugation, discard the supernatant, wash with absolute ethanol and distilled water three times after centrifugation, and put it at 60 Dry at constant temperature to obtain pure Bi 2 WO 6 Catalyst solid samples. We...

Embodiment 2

[0027] Take by weighing 1.9402g (4.0mmol) bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) and 0.6596g (2.0mmol) of sodium tungstate dihydrate (Na 2 WO 4 2H 2O) Dissolve in 80ml of aqueous solution and perform ultrasonication for about 10min to accelerate the dissolution of the reactants. Stir and fully react for 20 minutes, and add 0.02 g of cetyltrimethylammonium bromide (CTAB) respectively, so that it can be completely dissolved. Then, 0.5 mmol of cerium nitrate was added to the solution and stirred for 30 min, and the mixed solution was transferred to a 100 ml polytetrafluoroethylene-lined reactor, which was placed in a high-temperature oven at 180° C. for constant temperature reaction for 12 h. After cooling to room temperature, collect the reaction precipitate in the reaction kettle into a centrifuge tube, put it into a centrifuge for centrifugation, discard the supernatant, wash with absolute ethanol and distilled water three times after centrifugation, and put i...

Embodiment 3

[0029] Take by weighing 1.9402g (4.0mmol) bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) and 0.6596g (2.0mmol) of sodium tungstate dihydrate (Na 2 WO 4 2H 2 O) Dissolve in 80ml of aqueous solution and perform ultrasonication for about 10min to accelerate the dissolution of the reactants. Stir and fully react for 20 minutes, and add 0.02 g of cetyltrimethylammonium bromide (CTAB) respectively, so that it can be completely dissolved. Then add 0.2mmol lanthanum nitrate to the solution and stir for 30min to react, transfer the mixed solution to a 100ml polytetrafluoroethylene-lined reactor, put it into a high-temperature oven at 180°C for constant temperature reaction for 12h. After cooling to room temperature, collect the reaction precipitate in the reaction kettle into a centrifuge tube, put it into a centrifuge for centrifugation, discard the supernatant, wash with absolute ethanol and distilled water three times after centrifugation, and put it at 60 Dry at constant ...

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Abstract

The invention discloses a method for enhancing the photocatalytic performance of a Bi2WO6 system based on electron beam radiation. The preparation method comprises the following steps: 1) preparing Bi2WO6; 2) weighing the prepared dry Bi2WO6, packaging the Bi2WO6 into polytetrafluoroethylene plastic bags, uniformly spreading the polytetrafluoroethylene plastic bags, carrying out vacuum packaging,and irradiating the polytetrafluoroethylene plastic bags under electron beams, and thereby after the radiation is finished, the electron beam irradiation modified Bi2WO6 is obtained and is used for aphotocatalysis experiment. The catalyst material obtained by the method has excellent visible light photocatalytic performance, the photocatalytic performance and catalytic efficiency of Bi2WO6 are obviously improved after simple electron radiation treatment; therefore, the problem of environmental pollution can be effectively solved, and the method is simple in process, convenient to operate andconvenient for large-scale production.

Description

technical field [0001] The invention relates to the fields of radiation chemistry and photocatalytic material preparation, in particular to an electron beam radiation-enhanced Bi 2 WO 6 method for photocatalytic performance. Background technique [0002] Dye wastewater has teratogenic and carcinogenic hazards to animals and humans. Effective means must be adopted to control dye pollution. Dye wastewater treatment methods include adsorption, extraction, membrane separation, biodegradation, chemical oxidation, catalytic oxidation, electrolysis, etc. with TiO 2 The representative semiconductor photocatalysis technology is a promising method for dye wastewater treatment. But TiO 2 The forbidden band width is 3.2eV, resulting in strong oxidizing active groups that can only be excited by ultraviolet light, which accounts for only 4% of sunlight. For this reason, it is particularly important to develop new semiconductor materials with strong visible light response. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/31B01J37/34C02F1/30C02F101/30
CPCB01J23/31B01J23/002B01J37/347C02F1/30C02F2305/10C02F2101/308B01J35/39
Inventor 陈涛赵媛高洁吴岩胡鹏胡国文汪澜马睿段立磊
Owner HUBEI UNIV OF SCI & TECH