Composite catalyst of MoS2/defective MIL-100 (Fe) and preparation method and application thereof

A composite catalyst and defect-type technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve a wide range of pH applications, promote oxidation reaction efficiency, overcome traditional The effect of quality-limiting problems

Active Publication Date: 2020-09-15
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention utilizes MoS 2 Middle Mo 4+ , while using the iron-based active components exposed by the defect-type MIL-100(Fe), by incorporating the sheet-like structure of MoS 2 Distributed on the surface of defective MIL-100(Fe), its MoS 2 / Defective MIL-100(Fe) composite catalyst material not only takes into account MoS 2 And the good physical and chemical properties of the defective MIL-100(Fe) itself, it is the pollutant molecule and H in the Fenton-like system 2 o 2 Diffusion of molecules provides a favorable pathway to overcome mass transfer limitations in contaminant removal

Method used

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  • Composite catalyst of MoS2/defective MIL-100 (Fe) and preparation method and application thereof
  • Composite catalyst of MoS2/defective MIL-100 (Fe) and preparation method and application thereof
  • Composite catalyst of MoS2/defective MIL-100 (Fe) and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1: MoS of this embodiment 2 The preparation process of / defective MIL-100 (Fe) class Fenton composite catalyst comprises the following steps:

[0046] (1) Take MoS 2 The mass ratio of / MIL-100(Fe) is 0.2, and 0.128g MoS 2 Add it into 50mL of N,N-dimethylformamide, stir evenly, and then ultrasonicate for 5min to obtain MoS 2 the dispersion liquid;

[0047] (2) To the MoS obtained in step (1) 2 Add 0.27g FeCl to the dispersion 3 ·6H 2 O and 0.17g 1,4-H 2 BDC (terephthalic acid), then the mixed solution was ultrasonicated for 5 min, and then transferred to a dry polytetrafluoroethylene reactor.

[0048] (3) Gradually heat the polytetrafluoroethylene reactor in step (2) to 150° C. within 8 hours and keep it for 24 hours. After natural cooling, filter to obtain a precipitate.

[0049] (4) The precipitate obtained in step (3) is washed with deionized water and ethanol to remove residual unreacted reactants and colored impurities, and then dried in a vacuum o...

Embodiment 2

[0056] Embodiment 2: MoS of this embodiment 2 The preparation process of / defective MIL-100 (Fe) class Fenton composite catalyst comprises the following steps:

[0057] (1) Take MoS 2 The mass ratio of / MIL-100(Fe) is 0.6, and 0.384g MoS 2 Add it into 50mL of N,N-dimethylformamide, stir evenly, and then ultrasonicate for 8min to obtain MoS 2 the dispersion liquid;

[0058] (2) To the MoS obtained in step (1) 2 Add 0.27g FeCl to the dispersion 3 ·6H 2 O and 0.17g 1,4-H 2 BDC, then the mixed solution was ultrasonicated for 8 min, and then transferred to a dry polytetrafluoroethylene reactor.

[0059] (3) Gradually heat the polytetrafluoroethylene reactor in step (2) to 150° C. within 8 hours and keep it for 24 hours. After natural cooling, the precipitate was obtained by filtration.

[0060] (4) The precipitate obtained in step (3) was washed with deionized water and ethanol to remove residual unreacted reactants and colored impurities, and then dried in a vacuum oven at...

Embodiment 3

[0062] Embodiment 3: MoS of this embodiment 2 The preparation process of / defective MIL-100 (Fe) class Fenton composite catalyst comprises the following steps:

[0063] (1) Take MoS 2 The mass ratio of / MIL-100(Fe) is 0.8, and 0.512g MoS 2 Add it into 50mL of N,N-dimethylformamide, stir evenly, and then sonicate for 10min to obtain MoS 2 the dispersion liquid;

[0064] (2) To the MoS obtained in step (1) 2 Add 0.27g FeCl to the dispersion 3 ·6H 2 O and 0.167g 1,4-H 2 BDC, then the mixed solution was ultrasonicated for 10 min, and then transferred to a dry polytetrafluoroethylene reactor.

[0065] (3) Gradually heat the polytetrafluoroethylene reactor in step (2) to 150° C. within 8 hours and keep it for 24 hours. After natural cooling, filter to obtain a precipitate.

[0066] (4) The precipitate obtained in step (3) is washed with deionized water and ethanol to remove residual unreacted reactants and colored impurities, and then dried in a vacuum oven at a temperature o...

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Abstract

The invention discloses a composite catalyst of MoS2/defective MIL-100 (Fe) and a preparation method and application thereof. According to the composite catalys, MIL-100 (Fe) grows on MOS2 in situ toobtain a MoS2/MIL-100 (Fe) material, the MoS2/MIL-100 (Fe) material is activated at a high temperature to obtain the composite catalyst, the composite catalyst is formed by bonding MOS2 and MIL-100 (Fe), and the mass ratio of MOS2 to MIL-100 (Fe) is 0.2-0.8: 1. According to the composite catalyst, the reduction effect of Mo < 4 + > is utilized; meanwhile, the iron-based active component exposed bythe defective MIL-100 (FE) is utilized, good physicochemical properties of MoS2 and the defect type MIL-100 (Fe) are considered at the same time; a favorable way is provided for diffusion of pollutant molecules and H2O2 molecules in a Fenton-like system; the defect that the promotion effect of MoS2 composite catalysts on Fenton-like compounds in the prior art needs to depend on light conditions is overcome, the oxidation reaction promotion efficiency is improved, the pH application range is wide, and good catalytic degradation performance is still kept under the neutral pH condition.

Description

technical field [0001] The present invention relates to a kind of Fenton composite catalyst, particularly a kind of MoS 2 Composite catalyst, preparation method and application of defect type MIL-100(Fe). Background technique [0002] Sulfamethazine (SMZ), as a sulfonamide antibiotic, is mainly used as a veterinary drug. It has been detected in surface water, groundwater, and soil, and has aroused widespread concern in the society. At present, although SMZ can naturally decay through adsorption, photodegradation, and microbial transformation in natural waters (with a half-life of about 10 h), the continuous input of SMZ leads to its "pseudo-persistence" state. In addition, long-term exposure of microorganisms to environments containing SMZs can increase the risk of antibiotic resistance genes. The residual SMZ in the environment is absorbed into the food chain, which will cause potential harm to human health. The Fenton method has become a common method for treating antib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J27/051B01J35/10C02F1/72C02F101/38
CPCB01J31/2239B01J27/051B01J27/0515B01J35/1004C02F1/722C02F1/725B01J2531/842C02F2101/40C02F2305/026Y02W10/37
Inventor 杨维本杨朕陈嘉豪王旭增周世豪
Owner NANJING NORMAL UNIVERSITY
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