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Three-dimensional graphene macroscopic body loaded nanoscale zero-valent iron composite material and preparation method thereof

A graphene macro-body, nano-zero valent iron technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc. The effect of enriching organic pollutants and excellent adsorption capacity

Inactive Publication Date: 2019-01-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with traditional carbon materials, carbon-based nanomaterials have a huge surface area, outstanding adsorption capacity, and extremely high electron transport speed. Articles on carbon nanotubes and graphene oxide loaded with nano-zero-valent iron for the degradation of pollutants have been reported. , the effect is better than traditional carbon materials, but the key difficulty of carbon-based nanomaterials loaded with nano-zero-valent iron as a water treatment agent is that nanomaterials are usually in powder form. Defects such as environmental problems

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  • Three-dimensional graphene macroscopic body loaded nanoscale zero-valent iron composite material and preparation method thereof
  • Three-dimensional graphene macroscopic body loaded nanoscale zero-valent iron composite material and preparation method thereof
  • Three-dimensional graphene macroscopic body loaded nanoscale zero-valent iron composite material and preparation method thereof

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preparation example Construction

[0036] A method for preparing a three-dimensional graphene macroscopic body loaded nano-zero-valent iron composite material, characterized in that it comprises the following steps:

[0037] Step 1, the preparation of three-dimensional graphene macroscopic body;

[0038] 1.1 Prepare 20-100 mL of graphene oxide solution with a mass concentration of 2-8 mg / mL, and obtain a colloidal dispersion after ultrasonication for 1-3 hours;

[0039] 1.2 Add hydrazine hydrate (concentration: 55%) with a volume percentage of 2vol% to 5vol% to the obtained colloidal dispersion, and mix ultrasonically for 10 to 30 minutes to obtain a reaction solution;

[0040] 1.3 Transfer the reaction solution obtained in the previous step to a reaction kettle lined with polytetrafluoroethylene, and conduct a hydrothermal reaction at 100-180°C for 3-6 hours;

[0041] 1.4 After the reaction is completed, naturally cool to room temperature, and the obtained product is washed with deionized water to obtain a re...

Embodiment 1

[0051] A method for preparing a three-dimensional graphene macroscopic body loaded nano-zero-valent iron composite material, characterized in that it comprises the following steps:

[0052] Step 1, the preparation of three-dimensional graphene macroscopic body;

[0053] Prepare 20mL of graphene oxide solution with a mass concentration of 2mg / mL, obtain a colloidal dispersion after ultrasonication for 1h; add 1mL of hydrazine hydrate (concentration 55%) to the obtained colloidal dispersion and mix ultrasonically for 10min to obtain a reaction solution; The reaction solution obtained in the previous step was transferred to a reaction kettle lined with polytetrafluoroethylene, and hydrothermally reacted at 100°C for 3 hours; 2h, the reduced graphene oxide hydrogel was obtained, and then freeze-dried in a freeze dryer for 24h to obtain a fluffy and porous three-dimensional graphene macrobody;

[0054] Step 2, the loading of nanometer zero valent iron:

[0055] 2.1 Add 100mL, 0.1...

Embodiment 2

[0061] A method for preparing a three-dimensional graphene macroscopic body loaded nano-zero-valent iron composite material, characterized in that it comprises the following steps:

[0062] Step 1, the preparation of three-dimensional graphene macroscopic body;

[0063] Prepare 40 mL of graphene oxide solution with a mass concentration of 3 mg / mL, and obtain a colloidal dispersion after ultrasonication for 2 hours; add 1.5 mL of hydrazine hydrate (concentration 55%) to the obtained colloidal dispersion and ultrasonically mix for 20 minutes to obtain a reaction solution; Transfer the reaction solution obtained in the previous step to a reaction kettle with a polytetrafluoroethylene liner, and conduct a hydrothermal reaction at 120°C for 4 hours; After 2 hours, the reduced graphene oxide hydrogel was obtained, and then freeze-dried for 24 hours in a freeze dryer to obtain a fluffy and porous three-dimensional graphene macrobody;

[0064] Step 2, the loading of nanometer zero va...

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Abstract

The invention discloses a three-dimensional graphene macroscopic body loaded nanoscale zero-valent iron composite material. The carrier of the composite material is a three-dimensional graphene macroscopic body, the specific surface area of the three-dimensional graphene macroscopic body is 200-300m<2> / g, the density is 0.01-0.03g / cm<3>, the size of nanoscale zero-valent iron particles on the three-dimensional graphene macroscopic body is 20-100nm, and the loading capacity of the nanoscale zero-valent iron in the composite material is 10-30wt%. The composite material disclosed by the inventionhas excellent adsorption properties of the three-dimensional graphene macroscopic body on dyes and organic pollutants, also has strong reducing property of nano iron, and can be applied to enrichmentand degradation of the organic pollutants; and meanwhile, the nanoscale zero-valent iron is loaded onto the three-dimensional graphene macroscopic body, targeted contact between the nano iron and thepollutants is facilitated, the nano iron is easy to recover and recycle, and the problems that the nanoscale zero-valent iron is difficult to recover after entering the water and health risk exists can be solved.

Description

technical field [0001] The invention relates to a nano-composite material used for adsorption and degradation of environmental pollutants, in particular to a three-dimensional graphene macroscopic body-loaded nano-zero-valent iron composite material and a preparation method thereof, and the prepared material also has three-dimensional graphene anti-organic pollutants Extremely strong adsorption performance and the characteristics of small particle size of nano zero-valent iron, high surface activity, and large specific surface area, and the application of the composite material in the adsorption of dyes and the removal of heavy metal ions and organic pollutants in wastewater. Background technique [0002] As an emerging engineering nanomaterial, nano-ZVI particles exhibit excellent degradation ability in contaminated groundwater and contaminated site remediation. The so-called nano-iron refers to iron particles of 1-100nm. Because of its small size, it has extremely strong ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/32C02F1/28C02F1/70C02F101/20C02F101/30C02F101/36
CPCB01J20/02B01J20/205B01J20/28011B01J20/3204B01J20/3234C02F1/283C02F1/705C02F2101/20C02F2101/30C02F2101/308C02F2101/36
Inventor 陈文瑾宾琼王殷洁朱科慎雅倩
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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