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Method for preparing magnetic MoS<2>/Fe<3>O<4>/RGO (reduced graphene oxide) three-way composite visible-light-driven photocatalysts and application thereof

A ternary composite, visible light technology, applied in physical/chemical process catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as hindering production and application, difficulty in recycling, secondary pollution, etc. The effect of activity, avoidance of secondary pollution, strong development and application prospects

Inactive Publication Date: 2018-08-17
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, excessive use will cause difficulty in recycling, resulting in secondary pollution, hindering its actual production and application

Method used

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  • Method for preparing magnetic MoS&lt;2&gt;/Fe&lt;3&gt;O&lt;4&gt;/RGO (reduced graphene oxide) three-way composite visible-light-driven photocatalysts and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] 1.52g CH 4 N 2 S and 0.7g (NH 4 ) 6 MoO 7 o 24 4H 2 O was added to the water for 20min sonication; then 0.12gFe was added 3 o 4 , after ultrasonication for 20min, transferred to a polytetrafluoroethylene-lined high-pressure hydrothermal reactor at 200°C for 8h, and finally cooled naturally, centrifuged, washed with water three times, and then dried in a vacuum oven at 60°C for 12h to obtain magnetic MoS 2 @Fe 3 o 4 Composite visible photocatalyst, marked as MF.

[0011] The MF photocatalyst prepared in this example degrades 5 mg / L p-nitrophenol organic wastewater under visible light irradiation, and the degradation rate in 3 minutes is 70.4%.

Embodiment 2

[0013] 1.52g CH 4 N 2 S and 0.7g (NH 4 ) 6 MoO 7 o 24 4H 2 O was added to water and sonicated for 20min; then 0.03gGO was added, sonicated for 20min, then transferred to a high-pressure hydrothermal reactor with a polytetrafluoroethylene liner and kept at 200°C for 8h, and finally cooled naturally, centrifuged, washed with water three times, and then placed in vacuum drying MoS containing 5wt% GO was obtained by drying at 60 °C for 12 h in an oven. 2 / RGO composite visible light catalyst, marked as MG.

[0014] The MG photocatalyst prepared in this example degrades 5 mg / L p-nitrophenol organic wastewater under visible light irradiation, and the degradation rate in 3 minutes is only 0.4%.

Embodiment 3

[0016] 1.52g CH 4 N 2 S and 0.7g (NH 4 ) 6 MoO 7 o 24 4H 2 O was added to the water for 20min sonication; then 0.12g Fe was added at the same time 3 o 4 and 0.006g GO, ultrasonicated for 20min, transferred to a polytetrafluoroethylene-lined high-pressure hydrothermal reactor at 200°C for 8h, and finally cooled naturally, centrifuged, washed with water three times, and then dried in a vacuum oven at 60°C for 12h That is, magnetic MoS containing 1wt% GO was obtained 2 / Fe 3 o 4 / RGO ternary composite visible light catalyst, marked as MFG-1.

[0017] The MFG-1 photocatalyst prepared in this example degrades 5 mg / L p-nitrophenol organic wastewater under visible light irradiation, and the degradation rate in 3 minutes is 77.7%.

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Abstract

The invention discloses a method for preparing magnetic MoS<2> / Fe<3>O<4> / RGO (reduced graphene oxide) three-way composite visible-light-driven photocatalysts and application thereof. The method includes adding 1.52 g of CH<4>N<2>S and 0.7 g of (NH<4>)<6>MoO<7>O<24> <4>H<2>O into water and carrying out ultrasonic treatment for 20 min; adding 0.12 g of Fe<3>O<4> and 0.03 g of graphene oxide into thewater, carrying out ultrasonic treatment for 20 min to obtain substances, then transferring the substances into a hydrothermal reaction kettle, and keeping the substances at the temperatures of 200 DEG C for 8 h; naturally cooling the substances, centrifuging the substances, washing the substances by the aid of water thrice and drying the substances in a vacuum drying tank at the temperatures of60 DEG C for 12 h to obtain the magnetic MoS<2> / Fe<3>O<4> / RGO three-way composite visible-light-driven photocatalysts. The method and the application have the advantages that nitrophenol organic wastewater with the concentration of 5 mg / L can be quickly photocatalytically degraded by the magnetic MoS<2> / Fe<3>O<4> / RGO three-way composite visible-light-driven photocatalysts under visible light irradiation, the used magnetic MoS<2> / Fe<3>O<4> / RGO three-way composite visible-light-driven photocatalysts can be separated by the aid of external magnetic fields and then can be recycled, accordingly, secondary pollution can be prevented, and the magnetic MoS<2> / Fe<3>O<4> / RGO three-way composite visible-light-driven photocatalysts have excellent development and application prospects in practical application of degradation organic pollutant treatment technologies.

Description

technical field [0001] The invention belongs to the technical field of the preparation of composite visible light catalysts and the degradation of high-concentration organic wastewater, and specifically relates to a magnetic MoS 2 / Fe 3 o 4 Preparation method and application of RGO ternary composite visible light catalyst. Background technique [0002] p-Nitrophenol (4-NP) is an intermediate widely used in fine chemicals such as pesticides, pharmaceuticals, and dyes. Excessive use of 4-NP will lead to water pollution, which will threaten human health and ecological environment in severe cases. It is a typical organic pollutant in wastewater. Although some traditional technologies have been used to remove p-nitrophenol, they still face the technical problems of high energy consumption, low efficiency, and secondary pollution. Photocatalytic oxidation technology is an effective wastewater treatment technology because the use of photocatalysts can convert toxic organic poll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051C02F1/30C02F101/34C02F101/38
CPCC02F1/30B01J27/0515C02F2101/345C02F2101/38C02F2305/10B01J35/39B01J35/33
Inventor 孙剑辉王倩文董淑英谭露铁璐娜吕佳佳鲁娟
Owner HENAN NORMAL UNIV
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