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Preparation and application of TiO2@MoS2 composite

A composite and product technology, applied in the direction of water pollutants, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of unfavorable visible light catalysis applications, easy aggregation, etc., to achieve catalytic rate, large specific surface area, structure novel effects

Inactive Publication Date: 2015-12-16
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But a single MoS 2 Nanomaterials are easy to aggregate, which is not conducive to the application of visible light catalysis

Method used

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  • Preparation and application of TiO2@MoS2 composite
  • Preparation and application of TiO2@MoS2 composite
  • Preparation and application of TiO2@MoS2 composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1), TiO 2 For the preparation of nanoparticles, prepare 200 mL of a mixture of ethanol and acetonitrile with a volume ratio of 6:1, add 1 mL of deionized water and 0.8 mL of concentrated ammonia water, stir mechanically for 10 min to mix evenly, add 3 mL of tetrabutyl titanate, and stir for 8 h. Wash the product with absolute ethanol for 3 to 5 times, centrifuge at 4000rpm for 10min, and dry in an electric heating constant temperature blast drying oven to obtain white TiO 2 Microspheres. .

[0024] (2), MoS 2 / TiO 2 Preparation of composite structure, weigh 100mgNa 2 MoO 4 As molybdenum source, 50mgNa 2 S is used as a sulfur source, dissolved in 30mL N-methylpyrrolidone (NMP), ultrasonicated for 40min, and 100mgTiO 2 , transferred to a 50mL polytetrafluoroethylene high-pressure reactor, reacted at 220°C for 24 hours, cooled naturally, washed the product with absolute ethanol 3 to 5 times, centrifuged at 4000rpm for 10min, and dried in an electric heating constan...

Embodiment 2

[0026] (1), TiO 2 For the preparation of nanoparticles, prepare 150 mL of a mixture of ethanol and acetonitrile with a volume ratio of 4:1, add 0.5 mL of deionized water and 1 mL of concentrated ammonia water, stir mechanically for 20 min to mix evenly, add 3 mL of isopropyl titanate, and stir for 8 h. Wash the product with absolute ethanol for 3 to 5 times, centrifuge at 6000rpm for 10min, and dry in an electric heating constant temperature blast drying oven to obtain white TiO 2 powder. .

[0027] (2), MoS 2 / TiO 2 Preparation of composite structure, weigh 200mgNa 2 MoO 4 As molybdenum source, 100mgNa 2 S is used as a sulfur source, dissolved in 30mL dimethylformamide (DMF), ultrasonicated for 100min, and 100mgTiO 2 , transferred to a 50mL polytetrafluoroethylene high-pressure reactor, reacted at 220°C for 48h, cooled naturally, washed the product with absolute ethanol 3 to 5 times, centrifuged at 3000rpm for 10min, and dried in an electric heating constant temperatur...

Embodiment 3

[0030] Photocatalytic degradation of rhodamine B. The photocatalytic experiment was carried out in a CEL-LAX simulated visible light reactor (500W xenon lamp as the light source) produced by Beijing Zhongjiao Jinyuan Technology Co., Ltd., and a 5 mg / L rhodamine B solution was prepared. Accurately weigh 10mg of the product (MoS 2 / TiO 2 Composite structure, surface MoS 2 Content 43%), add this photocatalyst in the quartz test tube, add 100mL above-mentioned rhodamine B solution, ultrasonic dispersion is transferred to and carry out photocatalytic reaction in the simulated visible light reactor. After 60 min, the xenon lamp switch was turned on for the catalytic experiment. Samples of different time periods were taken according to the time required for the reaction. image 3 (1) is the corresponding ultraviolet-visible spectrum diagram. We can see from the diagram that when the amount of catalyst is only 10mg, the dye can be completely catalyzed in only 3 hours.

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Abstract

The invention relates to a preparation method and photocatalytic application of a TiO2 / MoS2 composite material. The method includes: hydrolyzing a titanium source to obtain TiO2 micrometer particles regular in appearance and uniform in size, adding a molybdenum source and a sulfur source into prepared TiO2 microspheres serving as a template, and preparing TiO2 / MoS2 core-shell microspheres through a hydrothermal method. By adjusting the amounts of reacting materials, the thickness range of a surface two-dimensional sheet structure of the composite microspheres is under effective control between 1nm and 1000nm. A prepared product has the advantages that the dimensional range is from 10nm to 4000nm, the particle size is uniform, and photocatalytic property is good. The composite material is applicable to degrading dyes in wastewater in visible light. The product is efficient in degrading various organic dyes in the visible light, and a new technical scheme is provided for large-scale wastewater treatment.

Description

technical field [0001] The invention introduces a preparation method of a novel structured photocatalyst, especially the preparation of core-shell titanium dioxide / molybdenum disulfide. [0002] The invention also relates to photocatalytic treatment of dye wastewater, which belongs to the application of photocatalytic technology to environmental treatment. Background technique [0003] As a deep oxidation method, photocatalysis has been recognized as the most promising pollutant removal technology. Photocatalytic materials use light energy to degrade organic pollutants so as to achieve the purpose of treating water environment. The common photocatalytic light source is mainly ultraviolet light, but visible light accounts for 43% of natural light. How to use this part of light source to achieve the degradation of organic matter has attracted great attention. [0004] As a typical layered transition metal sulfide, molybdenum disulfide (MoS 2 ) Nanomaterials have a layered s...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J35/10C02F1/30C02F101/38C02F103/30
CPCY02W10/37
Inventor 王传洗林会会张弛
Owner JIANGNAN UNIV
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