Floatable magnetic polymeric composite material, and preparation method and application thereof

A composite material and polymer technology, applied in the field of magnetic polymer composite materials and their preparation, can solve the problems of heavy metals, insoluble instability, environmental pollution, etc., and achieve strong photocatalytic degradation of organic pollutants. Capability, wide application range, effect of widening response range

Active Publication Date: 2019-04-19
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the treatment methods of heavy metals in water mainly include precipitation method, redox method, adsorption method and biological method, etc. Among them, the most widely used method is precipitation method, which converts heavy metals into insoluble substances and leaves them in the environment. Insoluble substances are unstable, and heavy metal ions will be released again under certain conditions (such as pH changes, etc.), which will cause environmental pollution again, so this method still cannot fundamentally solve the pollution problem of heavy metals

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  • Floatable magnetic polymeric composite material, and preparation method and application thereof
  • Floatable magnetic polymeric composite material, and preparation method and application thereof
  • Floatable magnetic polymeric composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] This embodiment provides a buoyant magnetic polymer composite material and its preparation method and application.

[0062] (1) ethylene glycol-water with a volume ratio of 1:1 is a reaction solvent, adding ferric chloride and hydrazine hydrate to obtain a reaction solution in which the concentration of ferric chloride is 1wt.% and the concentration of hydrazine hydrate is 0.05wt.%. React in a hydrothermal reactor at 160°C for 8 hours, centrifuge, and dry to obtain magnetic nano-iron oxides;

[0063] (2) add zinc chloride, sodium hydroxide and sodium sulfide to water, obtain zinc chloride concentration and be 0.4wt.%, the reaction solution that sodium hydroxide concentration is 30wt.% and sodium sulfide concentration is 0.4wt.%, in React at 80°C for 4 hours, centrifuge, and dry to obtain nano-zinc sulfide with photocatalytic effect;

[0064] (3) Ultrasonically disperse the magnetic nano-ferric oxide compound in a 1wt.% sodium alginate solution to obtain a reaction syst...

Embodiment 2

[0068] This embodiment provides a buoyant magnetic polymer composite material and its preparation method and application.

[0069] (1) Take ethylene glycol as reaction solvent, add iron sulfate and sodium thiosulfate, obtain the reaction solution that iron sulfate concentration is 1wt.% and sodium thiosulfate concentration is 0.5wt.%, in hydrothermal reaction kettle React at 220°C for 24 hours, centrifuge, and dry to obtain the magnetic nano-iron-sulfur compound.

[0070] (2) Take 10 g of urea and place it in a 50 mL crucible, and react in a muffle furnace at 550° C. for 5 h to obtain carbon nitride. Add zinc sulfate, carbon nitride, sodium hydroxide and thiourea to water, obtain zinc sulfate concentration and be 0.1wt.%, carbon nitride concentration is 0.05wt.%, sodium hydroxide concentration is 15wt.% and thiourea concentration is 0.2wt.% reaction solution, react at 90°C for 12h, centrifuge, and dry to obtain nano-g-C with photocatalytic effect 3 N 4 / ZnS.

[0071] (3) U...

Embodiment 3

[0075] This embodiment provides a buoyant magnetic polymer composite material and its preparation method and application.

[0076] (1) Take ethanol as the reaction solvent, add iron acetate and sodium sulfate nonahydrate, obtain the reaction solution that the concentration of iron acetate is 2wt.% and the concentration of sodium sulfate nonahydrate is 0.5wt.%, in a hydrothermal reaction kettle at 120 ℃ React for 10 hours, centrifuge and dry to obtain the magnetic nano-iron-sulfur compound.

[0077] (2) Take 10 g of urea and place it in a 50 mL crucible, and react in a muffle furnace at 500° C. for 4 h to obtain carbon nitride. Add zinc nitrate, carbon nitride, potassium hydroxide and sodium thiosulfate to water to obtain a zinc nitrate concentration of 0.1wt.%, a carbon nitride concentration of 0.025wt.%, a potassium hydroxide concentration of 12wt.% and thiosulfate The reaction solution with a sodium sulfate concentration of 0.1wt.% was reacted at 80°C for 24 hours, centrifu...

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Abstract

The invention belongs to the technical fields of polymeric composite materials and sewage treatment, and concretely relates to a floatable magnetic polymeric composite material, and a preparation method and an application thereof. The composite material is composed of a composite of a magnetic nano-iron oxide compound or a magnetic nano-iron sulfide compound and a nano-zinc sulfide or nano-zinc sulfide compound. Above magnetic nano-materials make the composite material directly recovered by an iron screen after being used in order to fundamentally remove heavy metals, so the composite materialcan be easily recycled; nano-zinc sulfide or its composite material has a large specific surface area, so the response range of the composite material to visible lights is widened, and the separationof photogenerated electrons and holes is promoted; and the composite material can float on the water surface and fully utilize the sunlight and oxygen in air, so the composite material has strong ability to photocatalytically degrade organic pollutants. The composite material has the advantages of simple preparation method, low cost and wide application range, and can be directly biodegraded in the environment after being used.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials and sewage treatment, and in particular relates to a floatable magnetic polymer composite material and its preparation method and application. The magnetic polymer composite material can simultaneously remove heavy metals in water bodies and photocatalytically degrade organic pollutants in water bodies. Background technique [0002] In recent years, water environmental pollution caused by organic matter and heavy metals has caused a severe global crisis, seriously threatening ecological balance and human health. In particular, all kinds of organic dye wastewater discharged from industrial production such as printing, dyeing and textile, as well as the wastewater produced by my country's heavy metal industrial processing occupy a considerable volume of sewage. Therefore, the treatment of sewage containing organic matter and heavy metals has become an urgent problem for scientifi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01J31/32B01J27/04C02F1/28C02F1/30C02F101/20C02F101/22C02F101/30
CPCB01J27/04B01J31/28B01J31/32B01J35/0033B01J35/004C02F1/288C02F1/30C02F2101/20C02F2101/22C02F2101/308C02F2305/10
Inventor 蒋刚彪黄锨航刘永林陈文照胡甜
Owner SOUTH CHINA AGRI UNIV
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