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A kind of modified molybdenum disulfide for heavy metal ion adsorption and preparation method thereof

A heavy metal ion, molybdenum disulfide technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of long preparation cycle, complex preparation process, poor environmental protection, etc. The preparation method is simple and the effect of delamination is favorable

Active Publication Date: 2019-12-03
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a modified molybdenum disulfide for the adsorption of heavy metal ions and its preparation method to solve the problems of complex preparation process, long preparation cycle and poor environmental protection in the existing technology

Method used

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  • A kind of modified molybdenum disulfide for heavy metal ion adsorption and preparation method thereof
  • A kind of modified molybdenum disulfide for heavy metal ion adsorption and preparation method thereof
  • A kind of modified molybdenum disulfide for heavy metal ion adsorption and preparation method thereof

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preparation example Construction

[0026] A modified molybdenum disulfide for heavy metal ion adsorption and a preparation method thereof specifically comprises the following steps:

[0027] S101: first mix the natural molybdenite powder, metal reducing agent and molten salt in proportion;

[0028] S102: heating the mixture in S101 to a certain temperature, cooling after keeping warm;

[0029] S103: washing the mixture obtained after cooling in S102 with dilute acid;

[0030] S104: Finally, wash with ultrapure water until neutral, centrifuge, and dry.

[0031] Preferably, in S101, the molar ratio of the natural molybdenite powder, metal reducing agent and molten salt is 1:(0.1-2):(3-15).

[0032] Preferably, in S101, the MoS in the natural molybdenite 2 The content is greater than 90wt%; the metal reducing agent is selected from metal sodium, metal potassium, metal calcium, metal magnesium, metal aluminum, metal iron, metal zinc and one or more of the above metals; the molten salt is selected from One or mo...

Embodiment 1

[0040] A modified molybdenum disulfide for heavy metal ion adsorption and a preparation method thereof, comprising the following steps:

[0041] 1) Get 1g of natural molybdenite powder, 0.1g metal magnesium and 3g sodium chloride and mix evenly, place in a small ceramic boat, then place the small ceramic boat filled with the above mixture in a tube furnace, Heating to 650°C in an argon atmosphere, holding the temperature for 4 hours, and cooling naturally;

[0042] 2) The mixture obtained above was washed with 7% dilute hydrochloric acid for 3 hours, then washed with ultrapure water until neutral, centrifuged and dried to obtain the modified molybdenum disulfide.

[0043] X-ray diffraction spectrum (XRD) ( figure 2 ) shows that the original molybdenum disulfide shows clearly visible elemental MoS2 characteristic diffraction peaks, no other miscellaneous peaks appear, indicating that the precursor used is relatively pure; after modification by the method of the present invent...

Embodiment 2

[0048] A modified molybdenum disulfide for heavy metal ion adsorption and a preparation method thereof, comprising the following steps:

[0049] 1) Take 2g of natural molybdenite powder, 0.5g of metal Al and 7g of sodium chloride and mix them evenly, place them in a corundum crucible, then place the corundum crucible containing the above mixture in a tube furnace, in a helium atmosphere Heat to 700°C, keep warm for 5h, and cool naturally;

[0050] 2) The mixture obtained above was washed with 5% dilute hydrochloric acid for 5 hours, then washed with ultrapure water until neutral, centrifuged and dried to obtain the modified molybdenum disulfide.

[0051] The obtained modified molybdenum disulfide has similar characteristics to those in Example 1, and has better adsorption effect on heavy metal ions.

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Abstract

The invention provides modified molybdenum disulfide for heavy metal ion adsorption and a preparation method thereof, and belongs to the field of environmental heavy metal pollution control. The preparation method comprises the following steps: firstly, uniformly mixing natural molybdenite powder, a metal reducing agent and molten salt in proportion; then, heating the obtained mixture to a certain temperature, preserving heat and cooling; then, washing the cooled mixture by using dilute acid; finally, washing till a neutral mixture is obtained by using ultrapure water, centrifuging and drying. By the preparation method, the modified molybdenum disulfide with a relatively large specific surface area is prepared; the modified molybdenum disulfide has high heavy metal ion adsorbing capacity; the preparation process is a solid phase reaction process, so that use of toxic and dangerous organic reagents is avoided; the preparation method is simple, high in efficiency, environmentally friendly and short in preparation period, and is suitable for large-scale preparation; the modified molybdenum disulfide has a wide application prospect in the field of heavy metal pollution control.

Description

technical field [0001] The invention belongs to the field of environmental heavy metal pollution control, and in particular relates to a modified molybdenum disulfide used for heavy metal ion adsorption and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of industry and the increasingly serious environmental problems, the pollution of heavy metal ions in water and soil is attracting more and more attention. Heavy metal ions mainly come from mining, chemical industry, smelting, leather and other industries, and eventually migrate into water bodies and soils, where they can be absorbed by plants, enrich in humans and animals through the food chain, and cause serious harm to the ecological environment and human health (SparksD. , Elements, 2005, 1(4):193-197). The treatment methods of heavy metal pollution in water mainly include adsorption method, chemical precipitation method, flocculation method, membrane separation me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/02B01J20/30C02F1/28C02F101/20
CPCB01J20/0266B01J20/28057B01J2220/4806C02F1/281C02F2101/20
Inventor 朱润良陈情泽傅浩洋朱雁平朱建喜何宏平
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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