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Mercury removal adsorbent with core-shell structure, and preparation method thereof

A technology of core-shell structure and adsorbent, which is applied in the field of mercury removal adsorbent with core-shell structure and its preparation, can solve the problem that nanomaterials remove typical toxic pollution without significant efficiency, and achieve controllable shape and size , easy preparation, good catalytic and adsorption performance

Inactive Publication Date: 2020-01-10
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In recent years, a large number of studies have shown that nanomaterials are notably effective in removing typical toxic pollution.

Method used

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  • Mercury removal adsorbent with core-shell structure, and preparation method thereof
  • Mercury removal adsorbent with core-shell structure, and preparation method thereof
  • Mercury removal adsorbent with core-shell structure, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] This embodiment provides a method for preparing a mercury removal adsorbent with a core-shell structure, and the specific steps are as follows:

[0031] Step 1: Add 1.35gFeCl 3 ·6H 2 O is dissolved in 40mL pure ethylene glycol solution (concentration> 99%), use a magnetic stirrer to stir for 30 minutes, add 3.6g anhydrous sodium acetate, 1.0g polyethylene glycol, and magnetically stir for 60-90 minutes at a speed of 5r / min; transfer the resulting solution to a 100ml water reactor at 200°C After the reaction is completed for 8 hours, the reaction is completed, cooled to room temperature, and washed repeatedly with absolute ethanol and deionized water for 3 to 5 times, and the washed Fe 3 O 4 The nanoparticles are put into an oven and dried at a temperature of 60℃ to obtain clean Fe 3 O 4 Nanoparticle

[0032] Step 2: Add 1.75g ​​of ammonium molybdate tetrahydrate [(NH4) 6 Mo 7 O 24 ·4H 2 O], 3.8g of thiourea was added to 50mL of deionized water, and stirred with a magnetic sti...

Embodiment 2

[0036] The difference between this embodiment and embodiment 1 is that the hydrothermal reaction temperature in step 4 is 180° C., and the remaining steps are the same as those in embodiment 1, and finally, mercury removal adsorbent 2 is obtained.

Embodiment 3

[0038] The difference between this embodiment and embodiment 1 is that the hydrothermal reaction temperature in step 4 is 200° C., and the remaining steps are the same as those in embodiment 1, and finally, mercury removal adsorbent 3 is obtained.

[0039] Such as figure 1 , 2 , 3 shows that as the synthesis temperature increases, Fe 3 O 4 Nanoparticles are coated with more MoS 2 Nanosheet, MoS 2 The crystallinity and degree of order of the nanosheets also increase.

[0040] Such as Figure 4 , 5 、6, for the simulated power plant flue gas (120℃) environment, and N 2 As a carrier gas, the mercury removal rate of mercury removal adsorbent 1 and mercury removal adsorbent 2 can almost reach 100% within 50 minutes, and the mercury removal rate of mercury removal adsorbent 3 is between 98%-100%, and they are all very stable. The mercury removal rate of molybdenum disulfide produced by the process generally only reaches about 80%, indicating that the mercury removal effect of the present ...

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Abstract

The invention discloses a mercury removal adsorbent with a core-shell structure. The mercury removal adsorbent is characterized in that Fe3O4 nanoparticles are used as a carrier, and MoS2 nanosheets are grown on the surface of Fe3O4 in situ to form a Fe3O4@MoS2 core-shell structure in order to obtain the mercury removal adsorbent with the core-shell structure. The Fe3O4 nanoparticles are taken asa raw material, and are dispersed into deionized water, ammonium molybdate tetrahydrate and thiourea are added, and the mercury removal adsorbent, namely the MoS2 Fe3O4 nano-composite material, is prepared by using a hydrothermal technology. The composite material has the advantages of good crystallinity, controllable morphology and size, and excellent adsorption performance.

Description

Technical field [0001] The invention belongs to the field of mercury removal materials, and particularly relates to a mercury removal adsorbent with a core-shell structure and a preparation method thereof. Background technique [0002] Molybdenum disulfide, metallic luster, black powder, hexagonal crystal system, layered structure. Molybdenum disulfide and graphene have similar structures and properties. There is only a weak van der Waals force between the layers, the bond energy is very low, the layers are easily separated from each other, and the friction factor is very low. Molybdenum disulfide has good heat resistance and stable chemical properties. It is insoluble in dilute acid and water, but soluble in aqua regia and hot concentrated sulfuric acid. Because of these characteristics, molybdenum disulfide (MoS2) has an adjustable band gap in recent years, so it has attracted attention as a high-tech material and is widely used in optoelectronic devices, mechanical lubricatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30B01D53/02B01D53/86B01D53/64B01J27/051
CPCB01J20/06B01J20/28009B01D53/02B01D53/8665B01J27/0515B01D2258/0283B01J35/33
Inventor 何平张熠赵昕熠秦煌魏杰徐天红
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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