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Molybdenum disulfide intercalated hydrotalcite composite material and preparation method and application thereof

A technology of molybdenum disulfide and composite materials, which is applied in chemical instruments and methods, catalyst activation/preparation, water treatment of special compounds, etc., can solve the problems of reduction of photocatalyst active sites, deterioration of catalyst performance, and easy recombination of photogenerated carriers. , to achieve the effect of improving photocatalytic performance, more active sites, and avoiding agglomeration

Active Publication Date: 2018-03-09
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although molybdenum disulfide nanomaterials with various morphologies have been successively synthesized and prepared, the existing molybdenum disulfide nanomaterials generally have problems such as interparticle agglomeration and nanometer boundary automatic closure during the nanonization process, which makes the activity of photocatalysts The position is reduced, and the photogenerated carriers are easily recombined at the interface, which eventually leads to the deterioration of the catalyst performance.

Method used

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  • Molybdenum disulfide intercalated hydrotalcite composite material and preparation method and application thereof
  • Molybdenum disulfide intercalated hydrotalcite composite material and preparation method and application thereof
  • Molybdenum disulfide intercalated hydrotalcite composite material and preparation method and application thereof

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Embodiment 1

[0049] A kind of preparation method of triethanolamine modified molybdenum disulfide intercalation MgAl hydrotalcite composite catalytic material of the present invention, it specifically comprises the following steps:

[0050] (1) Add 0.05mol magnesium chloride, 0.02mol aluminum nitrate, 0.04mol sodium molybdate and 0.06mol sodium hydroxide to 100mL water, stir and react at 35°C for 1h; then heat up to 85°C for 6h crystallization; crystallization is complete After suction filtration and washing, the filter cake was dispersed in 50mL water to make hydrotalcite prepolymer suspension;

[0051] (2) Take 50mL of the above-mentioned hydrotalcite prepolymer suspension, add 2.5g of thiourea and 1.5g of triethanolamine, ultrasonically disperse it, place it in a high-pressure reactor, and raise the temperature to 200°C at a heating rate of 3°C / min. ℃, heat preservation reaction for 900min, cooling after the completion of the reaction, washing with a mixed solution of water and ethanol ...

Embodiment 2

[0085] A kind of preparation method of ethylenediamine tetraethanol modified molybdenum disulfide intercalation MgFe hydrotalcite composite catalytic material of the present invention, its specific steps are as follows:

[0086] (1) Add 0.05mol magnesium chloride, 0.02mol ferric chloride, 0.04mol sodium molybdate and 0.06mol sodium hydroxide to 100mL water, stir at 35°C for 1h, then raise the temperature to 85°C for 6h, crystallization is complete After suction filtration and washing, the filter cake was dispersed in 50mL water to make hydrotalcite prepolymer suspension;

[0087] (2) Take 50mL of the above-mentioned hydrotalcite prepolymer suspension, add 2.5g of thiourea and 1.8g of ethylenediaminetetraethanol, after ultrasonic dispersion, put it in a high-pressure reactor, under the condition that the heating rate is 3°C / min Raise the temperature to 200°C, keep it warm for 900 minutes, cool down after the reaction, wash with a mixed solution of water and ethanol (50% mass fr...

Embodiment 3

[0091] A kind of preparation method of triisopropanolamine modified molybdenum disulfide intercalation ZnAl hydrotalcite composite catalytic material of the present invention, its specific steps are as follows:

[0092] (1) Add 0.05mol magnesium chloride, 0.02mol ferric chloride, 0.04mol sodium molybdate and 0.06mol sodium hydroxide to 100mL water, stir at 35°C for 1h, then raise the temperature to 85°C for 6h, crystallization is complete After suction filtration and washing, the filter cake was dispersed in 50mL water to make hydrotalcite prepolymer suspension;

[0093] (2) Take 50mL of the above-mentioned hydrotalcite prepolymer suspension, add 2.5g of thiourea and 1.8g of triisopropanolamine, after ultrasonic dispersion, put it in a high-pressure reactor, under the condition that the heating rate is 3°C / min Raise the temperature to 200°C, keep it warm for 900 minutes, cool down after the reaction, wash with a mixed solution of water and ethanol (50% by mass) for 3 to 5 time...

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Abstract

The invention discloses a molybdenum disulfide intercalated hydrotalcite composite material and a preparation method and application thereof. The preparation method includes the steps of (1) dissolving divalent metal ions M <2+>, trivalent metal ions <M3+>, soluble molybdate and alkali into water, carrying out stirring reaction and crystallizing so as to obtain molybdate intercalated hydrotalciteformer polymers; (2), adding a sulphur source and a hydroxy-containing compound into the molybdate intercalated hydrotalcite former polymers obtained in the step (1), performing hydrothermal reactionand filtering so as to obtain the molybdenum disulfide intercalated hydrotalcite composite material. The preparation method is simple in technology, mild in condition, safe and environment friendly. The molybdenum disulfide intercalated hydrotalcite composite material is high in catalytic activity and stability, convenient to recycle and suitable for large-scale industrial production and application and has a promising industrial application prospect in the field of photocatalytic degradation of organic pollutants in dye wastewater and phenolic wastewater.

Description

technical field [0001] The invention relates to the technical field of organic wastewater treatment, in particular to a molybdenum disulfide intercalated hydrotalcite composite material and a preparation method and application thereof. Background technique [0002] With the rapid development of cities and industries, global water pollution is increasing day by day. There are many kinds of organic pollutants in water bodies and they are very harmful. Simple physical treatment methods cannot completely degrade or transform pollutants, so photocatalytic oxidation degradation technology has gradually become a hot spot of concern. Although solar photocatalytic degradation technology has been widely accepted, there are still many problems in practical applications, especially the low spectral absorption and utilization of core materials. [0003] Molybdenum disulfide (MoS 2 ) has great application prospects in the field of photocatalytic degradation of organic matter due to its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051C02F1/30C02F101/36C02F101/38
CPCC02F1/30B01J27/051B01J37/10C02F2101/40C02F2101/38C02F2101/36C02F2305/10B01J35/39
Inventor 曹占芳杨帆钟宏王帅刘广义
Owner CENT SOUTH UNIV
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