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Fe3O4/MoS2/BiVO4 material preparing method, product and application of product

A composite material and reactant technology, which is applied to the preparation of Fe3O4/MoS2/BiVO4 and the field of composite materials, can solve the problems of narrow absorption light wavelength range, low photocatalytic efficiency, and inability to fully utilize sunlight, etc. The effect of improving the photocatalytic efficiency and improving the recycling rate

Inactive Publication Date: 2018-08-03
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, MoS 2 When it is used as a photocatalyst, it cannot make full use of sunlight due to its narrow absorption wavelength range, so the photocatalytic efficiency is not high when it is used independently

Method used

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  • Fe3O4/MoS2/BiVO4 material preparing method, product and application of product
  • Fe3O4/MoS2/BiVO4 material preparing method, product and application of product

Examples

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preparation example Construction

[0028] Specifically, Fe 3 o 4 / MoS 2 / BiVO 4 The specific preparation method of the composite material includes: dissolving bismuth nitrate and metavanadic acid in deionized water, stirring magnetically for 30-40 minutes, and then adding Fe 3 o 4 / MoS 2 Vibrate the material ultrasonically for 20-30 minutes to obtain a mixed solution, pour the mixed solution into a polytetrafluoroethylene liner with a filling degree of 80%, put the polytetrafluoroethylene liner into a stainless steel reaction kettle, and place it in an electric thermostat to Heating at a heating rate of 5°C / min to 160-170°C, reacting for 15-17 hours; washing the reactants with distilled water and absolute ethanol respectively, and then centrifuging at a speed of 6000r / min for 5min, and placing the centrifuged product in vacuum drying In an oven, dry at 50°C for 3h, at 60°C for 3h, at 70°C for 3h, and at 80°C for 3h.

[0029] Among them, Fe 3 o 4 / MoS 2 Composite preparation methods include:

[0030] S...

Embodiment 1

[0040] Weigh 2.7g ferric chloride hexahydrate and 7.2g sodium acetate, add 0.6g polyethylene glycol, dissolve in 70mL ethylene glycol, carry out magnetic stirring for 30-40min, ultrasonic vibration for 10-20min, transfer it to In a polytetrafluoroethylene-lined reactor with a filling degree of 80%, react at 200°C for 8 hours, wash with deionized water and absolute ethanol three times, centrifuge at a speed of 6000r / min, and place in a vacuum oven Under the condition of vacuum degree of -0.1MPa, dry at 40°C for 5 hours, and dry at 50°C for 7 hours to obtain ferric oxide;

[0041] Weigh 0.36g sodium molybdate dihydrate, 2.38g ammonium molybdate tetrahydrate and 2.28g thiourea respectively, mix them, stir magnetically for 30min, then add 0.10g of prepared ferric oxide, and vibrate ultrasonically for 30min; It was transferred to a polytetrafluoroethylene-lined reactor and reacted at 200°C for 24 hours. After cooling to room temperature, it was washed three times with deionized wat...

Embodiment 2

[0046] The difference between this embodiment and embodiment 1 is: in the mixed solution of bismuth nitrate pentahydrate and ammonium metavanadate, Fe 3 o 4 / MoS 2 The amount of powder added is 0.107g, namely Bi 3+ with Mo 6+ Molar ratio = 15:1.

[0047] The prepared magnetic Fe 3 o 4 / MoS 2 / BiVO 4 The photocatalytic experiment of the composite photocatalyst was carried out under the same conditions, and the degradation rate of the tetracycline hydrochloride solution was 87.5% after 2 hours. After recovery and reuse, its photocatalytic treatment efficiency reaches about 80%.

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Abstract

The invention discloses a Fe3O4 / MoS2 / BiVO4 material preparing method, a product and an application of the product. The method comprises the steps: firstly, dissolving ferric chloride hexahydrate, sodium acetate and polyethylene glycol in ethylene glycol, carrying out a reaction at the temperature of 180-200 DEG C for 8-9 h, and thus obtaining ferric oxide; then, mixing sodium molybdate dehydrate,sodium molybdate tetrahydrate and thiourea evenly, adding ferroferric oxide, and carrying out a reaction for 22-24 h at the temperature of 180-200 DEG C, to obtain a Fe3O4 / MoS2 material; finally, dissolving bismuth nitrate pentahydrate and ammonium metavanadate in deionized water, adding the Fe3O4 / MoS2 material, mixing evenly, carrying out a reaction for 15-17 h at the temperature of 160-170 DEG C, and thus obtaining a Fe3O4 / MoS2 / BiVO4 composite material. When the composite material is used as a photocatalyst for treating tetracycline hydrochloride wastewater, the degradation rate can reach 90% or more, and the photocatalytic efficiency can be improved. At the same time, because of the presence of Fe3O4, the photocatalyst can be recovered more conveniently and simply for repeated experiments, the recovery cost of the photocatalyst is reduced, and the repeated utilization rate of the photocatalyst is improved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to a Fe 3 o 4 / MoS 2 / BiVO 4 Its preparation method, the composite material prepared by the method and its application. Background technique [0002] As environmental problems become more and more serious, and people pay more and more attention to environmental problems, more and more new materials are discovered and used to treat wastewater. Among them, photocatalytic materials stand out for their ability to utilize light energy, complete reaction and no secondary pollution. In 1972, Fuyishima et al. discovered that the photoelectrode can decompose water into H under the irradiation of ultraviolet light. 2 and O 2 , opened up the field of photochemistry. BiVO 4 It is a kind of pale yellow inorganic dye, which has the characteristics of non-toxicity and good corrosion resistance. Due to its good response to visible light and small band gap, it has attracted ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051C02F1/30C02F101/34C02F101/38
CPCC02F1/30B01J23/002B01J27/0515C02F2101/34C02F2101/38C02F2305/10B01J35/39
Inventor 郭冀峰孙泽鑫陈慧张王超张丽媛武瑞马晶李鹏飞
Owner CHANGAN UNIV
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