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Molybdenum disulfide modified schwertmannite and preparation method and application thereof

A molybdenum disulfide and Schwitt technology, which is applied in the field of molybdenum disulfide modified Schwietermanite to efficiently degrade roxarsine in water, can solve the problem that organic pollutants cannot be fully degraded, and achieve the effect of rapid and efficient degradation.

Pending Publication Date: 2021-08-17
南京贝克特环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the sheet-like MoS on the composite catalyst 2 Intrinsic catalytic activity similar to peroxidase, sheet-like MoS 2 can directly decompose H 2 o 2 produce O 2 and H 2 O, which will cause it to require a large amount of H in the Fenton reaction 2 o 2 , and cannot achieve full degradation of high concentrations of organic pollutants (phenol 100mg / L, H 2 o 2 : 300mg / L, MoS 2 @Sch: 1.0g / L, reaction 40min, removal rate is only 85%)

Method used

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  • Molybdenum disulfide modified schwertmannite and preparation method and application thereof
  • Molybdenum disulfide modified schwertmannite and preparation method and application thereof
  • Molybdenum disulfide modified schwertmannite and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Molybdenum disulfide modified Schwittmannite (MoS 2 / Sch) preparation:

[0047] First to 74mmol Fe 2+ Add 37mmol H to the aqueous solution 2 o 2 (Fe 2+ with H 2 o 2 Molar ratio is 2), reacted for 1 hour. Then add 3mmol MoS 2 After stirring for 15 hours, the product was collected by filtration with 0.45 μm filter paper and washed 4 times with acidic water and pure water to obtain the solid catalyst MoS 2 / Sch, samples were preserved after vacuum freeze-drying.

[0048] The 1.3g of MoS prepared in this example 2 / Sch, Fe 2+ amount and Fe 3+ The amount is determined by XPS, and the mass ratio of the two is 1.97.

[0049] Seen from SEM ( figure 1 ), pure MoS 2 is a flaky structure ( figure 1 a), Sch is the appearance of the ball ( figure 1 b), MoS 2 / Sch shows a smaller size than Sch (average particle size 500-600nm), and small pieces of particles are loaded on Schwittmannite ( figure 1 c). In addition, the EDS plot ( figure 1 d) Display MoS 2 Modified ...

Embodiment 2

[0051] Molybdenum disulfide modified Schwittmannite (MoS 2 / Sch) preparation:

[0052] First to 100mmol Fe 2+ Add 50mmol H to the aqueous solution 2 o 2 (Fe 2+ with H 2 o 2 Molar ratio is 2), reacted for 1 hour. Then add 4.1mmol MoS 2 After stirring for 15 hours, the product was collected by filtration with a 0.45 μm filter membrane (filterable), and washed 4 times with acidic water and pure water to obtain a solid catalyst MoS 2 / Sch, samples were preserved after vacuum freeze-drying.

[0053] The 1.4g MoS prepared in this example 2 / Sch, Fe 2+ amount and Fe 3+ The amount is determined by XPS, and the mass ratio of the two is 1.92.

Embodiment 3

[0055] Molybdenum disulfide modified Schwittmannite (MoS 2 / Sch) preparation:

[0056] First to 120mmol Fe 2+ Add 60mmol H to the aqueous solution 2 o 2 (Fe 2+ with H 2 o 2 Molar ratio is 2), reacted for 1 hour. Then add 5mmol MoS 2 After stirring for 15 hours, the product was collected by filtration with a 0.45 μm filter membrane and washed 4 times with acidic water and pure water to obtain the solid catalyst MoS 2 / Sch, samples were preserved after vacuum freeze-drying.

[0057] The 1.51g of MoS prepared in this example 2 / Sch, Fe 2+ amount and Fe 3+ The amount is determined by XPS, and the mass ratio of the two is 1.94.

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Abstract

The invention discloses molybdenum disulfide modified schwertmannite and a preparation method and application thereof, and belongs to the technical field of water treatment. The molybdenum disulfide modified schwertmannite contains Fe < 2 + > and Fe < 3 + >, the amount of Fe < 2 + > and the amount of Fe < 3 + > are measured through XPS, and the mass ratio of Fe < 2 + > to Fe < 3 + > is not lower than 1.90; meanwhile, the molybdenum disulfide modified schwertmannite contains 1T-phase molybdenum disulfide; and Fe-Mo-S bonds are formed between molybdenum disulfide and schwertmannite, and the catalytic activity is good.

Description

technical field [0001] The invention belongs to the field of material synthesis, more specifically, relates to a molybdenum disulfide modification (MoS 2 ) to modify Schwittmannite (Sch) to efficiently degrade Roxarsone in water. Background technique [0002] Roxarsone (ROX) is widely used as an additive in the breeding industry to promote the growth of poultry and livestock. However, they are poorly metabolized in animals, and about 90% of organic arsenic is directly excreted from poultry manure without any change in chemical structure. As manure is used as fertilizer for land use, organic arsenic inevitably causes Soil and groundwater environmental pollution. Therefore, there is an urgent need to remove organic arsenic in the environment to further prevent potential environmental risks. In recent years, advanced oxidation methods for the degradation of organic arsenic have been extensively studied. Schwittmann's stone (Sch) is a hydroxy iron sulfate mineral commonly fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/053C02F1/72C02F1/30C02F101/30C02F103/20
CPCB01J27/053C02F1/725C02F1/722C02F1/30C02F2101/30C02F2305/026C02F2103/20C02F2305/023B01J35/39
Inventor 周立祥李婷
Owner 南京贝克特环保科技有限公司
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