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Preparation method and application of carbon sphere loaded nanoscale zero valent iron composite material

A technology of nano-zero-valent iron and composite materials, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., to achieve environmental friendliness, easy promotion, and solve the effect of reunion

Active Publication Date: 2016-10-26
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Literature search shows that the preparation of carbon sphere-loaded nano-zero-valent iron composites by liquid phase reduction method has not been reported yet.

Method used

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  • Preparation method and application of carbon sphere loaded nanoscale zero valent iron composite material
  • Preparation method and application of carbon sphere loaded nanoscale zero valent iron composite material
  • Preparation method and application of carbon sphere loaded nanoscale zero valent iron composite material

Examples

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Effect test

Embodiment 1

[0026] Example 1: Preparation of nano-zero-valent iron composite material supported by carbon spheres and its transmission electron microscope analysis

[0027] (1) Prepare a glucose solution with a concentration of 0.952 mol / L with deionized water, stir evenly, transfer the prepared solution to a reaction kettle, and react at a temperature of 180°C for 15 hours. After the reaction is completed, naturally cool to room temperature. Centrifuge the obtained black or brown product, rinse it with deionized water and absolute ethanol in turn, filter it to dryness, dry it at 70°C for 4 hours to obtain carbon spheres, and keep it sealed;

[0028] (2) 5.429g FeSO 4 Add 1g of carbon spheres prepared in step (1) into 100mL of ethanol aqueous solution (made by mixing ethanol and water at a volume ratio of 3:7), then add 0.15g of polyethylene glycol, place in Stir in a magnetic stirrer for 3 h to ensure that all Fe 2+ Chelated to the surface of carbon spheres;

[0029] (3) Add 100 mL of...

Embodiment 2

[0032] Example 2: Preparation of nano-zero-valent iron composite material supported by carbon spheres and its Fourier transform infrared analysis

[0033] (1) Prepare a glucose solution with a concentration of 0.463 mol / L with deionized water, stir evenly, transfer the prepared solution to a reaction kettle, and react at a temperature of 160°C for 18 hours. After the reaction is completed, naturally cool to room temperature. Centrifuge the obtained black or brown product, rinse it with deionized water and absolute ethanol in sequence, filter it to dryness, dry it at 60°C for 4 hours to obtain carbon spheres, and keep it sealed;

[0034] (2) 1.448g FeCl 3 Add 0.5g of carbon spheres prepared in step (1) into 50mL of ethanol aqueous solution (prepared by mixing ethanol and water at a volume ratio of 1:4), then add 0.1g of polyethylene glycol, and ultrasonically Stir in a magnetic stirrer for 2h to ensure that all Fe 3+ Chelated to the surface of carbon spheres;

[0035] (3) Ad...

Embodiment 3

[0038] Example 3: Preparation of carbon sphere-loaded nano-zero-valent iron composites and the effect of different iron amounts on the removal rate

[0039] (1) Prepare a glucose solution with a concentration of 0.444mol / L with deionized water, stir evenly, transfer the prepared solution to a reaction kettle, and react at a temperature of 180°C for 12 hours. After the reaction is completed, cool down to room temperature naturally. Centrifuge the obtained black or brown product, rinse it with deionized water and absolute ethanol in turn, filter it to dryness, dry it at 50°C for 4 hours to obtain carbon spheres, and keep it sealed;

[0040] (2) 1.357g, 2.714g, 5.429g, 8.143g FeSO 4 Add 1g of carbon spheres prepared in step (1) into 100mL of ethanol aqueous solution (prepared by mixing ethanol and water at a ratio of 1:1 by volume), to obtain 4 mixtures of different proportions, and then add 0.1g of Polyethylene glycol, placed in a magnetic stirrer after sonication and stirred f...

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Abstract

The invention provides a preparation method of a carbon sphere loaded nanoscale zero valent iron composite material. The method comprises: (1) preparing carbon spheres containing hydrophilic functional groups (-OH, -COOH) by a hydrothermal method; (2) chelating iron ions and the functional groups by soaking; (3) finally, dropping potassium borohydride or sodium borohydride solution into carbon sphere mixed solution with the iron ions, and forming the carbon sphere loaded nanoscale zero valent iron composite material by a strong reducing effect. The material prepared by the preparation method provided by the invention not only simultaneously has an adsorption effect of the carbon spheres and the strong reducing effect of nanoscale zero valent iron, but also can form a micro primary cell between the iron and carbon; not only are the problems of clustering and the like of nanoscale zero valent iron particles solved, but also electron transfer is reinforced and a degrading effect on polluted waste water is promoted; the method provided by the invention is low in cost and simple to operate, and the nano particles have high dispersity and stability.

Description

technical field [0001] The invention belongs to the technical field of environmental functional materials and water treatment, and relates to a preparation method of a nano-zero-valent iron composite material supported by carbon spheres, and the composite material is applied to the degradation of antibiotic wastewater, the removal of heavy metals in water, and the decolorization of dye wastewater , Removal of pesticides and endocrine disruptors in water. Background technique [0002] Nano zero-valent iron (NZVI) technology is one of the most potential environmental restoration methods at present. It provides a new technology platform for the environmental field to reduce and remove a variety of halogenated alkanes, halogenated olefins, halogenated aromatics, and organochlorine pesticides. and other refractory organic pollutants, transforming them into non-toxic or low-toxic compounds, while improving their biodegradability, and effectively removing heavy metal ions, dyes, pe...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/70C02F1/46C02F1/62C02F101/38C02F101/36
CPCC02F1/288C02F1/46C02F1/705C02F2101/36C02F2101/38C02F2101/306
Inventor 王向宇杜毅
Owner KUNMING UNIV OF SCI & TECH
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