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Micelle modified nanometer zero-valent iron particle and preparation method and application thereof

A nano-zero-valent iron, modification and modification technology, applied in the field of preparation and modification of nano-materials, can solve the problems of increased application cost, secondary environmental pollution, etc., and achieves easy operation, good biocompatibility, and good dispersion performance. Effect

Active Publication Date: 2016-11-09
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the chemical reagents and modifiers used for nano-iron modification are improperly selected, it may cause secondary pollution to the environment and increase the application cost.

Method used

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  • Micelle modified nanometer zero-valent iron particle and preparation method and application thereof
  • Micelle modified nanometer zero-valent iron particle and preparation method and application thereof
  • Micelle modified nanometer zero-valent iron particle and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of three kinds of poloxamers (Poloxamer F68, Poloxamer F108 and Poloxamer F127) modified nano-zero-valent iron and the removal of Cr(VI)

[0038] A poloxamer modified nano zero valent iron, the modified nano zero valent iron includes nano zero valent iron and poloxamers (poloxamer F68, poloxamer F108 and poloxamer F127), poloxamer Sham self-assembled to form micelles coated on the surface of nano-zero-valent iron, and poloxamer micelles modify the surface of nano-zero-valent iron; the concentration of poloxamer in the modified nano-zero-valent iron is 5mmol / L The temperature of the solution is controlled at 30°C when poloxamer is added during the preparation of the nano-zero-valent iron.

[0039] (1) FeSO 4 Solution preparation: weigh 20g FeSO 4 ·7H 2 Put O in a beaker, add an appropriate amount of ultrapure water to dissolve and transfer to a 100mL volumetric flask, dilute to the mark, shake well, then 0.7M FeSO can be obtained 4 Solution.

[0040] (2) KBH 4 Solu...

Embodiment 2

[0050] Preparation of Poloxamer F127 Modified Nano-Zerovalent Iron and Removal of Orange II Dye

[0051] A poloxamer modified nano zero valent iron, the modified nano zero valent iron includes nano zero valent iron and poloxamer F127, poloxamer F127 self-assembles to form micelles coated on the surface of the nano zero valent iron, Poloxamer F127 micelles are used to modify the surface of nano-zero-valent iron; the concentration of poloxamer F127 in the modified nano-zero-valent iron is 0.5 mmol / L; the poloxam is added during the preparation of the nano-zero-valent iron When F127 is used, the temperature of the solution is controlled at 25°C.

[0052] (1) FeSO 4 Solution preparation: weigh 14.3g FeSO 4 ·7H 2 Put O in a beaker, add an appropriate amount of ultrapure water to dissolve and transfer to a 100mL volumetric flask, dilute to the mark, shake well, you can get 0.5mol / L FeSO 4 Solution.

[0053] (2) NaBH 4 Solution preparation: Weigh 5.67g into a beaker, add an appropriate amo...

Embodiment 3

[0058] Preparation of Poloxamer F127 Modified Nano-Zerovalent Iron and Removal of Metronidazole

[0059] A poloxamer modified nano-zero-valent iron, the modified nano-zero-valent iron includes nano-zero-valent iron and poloxamer F127, the poloxamer F127 self-assembles to form micelles coated on the surface of the nano-zero-valent iron, Poloxamer F127 micelles are used to modify the surface of nano-zero-valent iron; the concentration of poloxamer F127 in the modified nano-zero-valent iron is 8mmol / L; the poloxamer is added during the preparation of the nano-zero-valent iron For F127, the temperature of the solution is controlled at 40°C.

[0060] (1) FeSO 4 Solution preparation: weigh 25.7g FeSO 4 ·7H 2 Put O in a beaker, add an appropriate amount of ultrapure water to dissolve and transfer to a 100mL volumetric flask, dilute to the mark, and shake well to obtain 0.9mol / L FeSO 4 Solution.

[0061] (2) KBH 4 Solution preparation: Weigh 7.7g into a beaker, add an appropriate amount of ...

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Abstract

The invention discloses a micelle modified nanometer zero-valent iron particle and a preparation method and application thereof and belongs to the technical field of preparation and modification of nanometer materials. The modified nanometer zero-valent iron particle comprises nanometer zero-valent iron and environment-friendly micelle poloxamer (comprising poloxamer F68, poloxamer F108 and poloxamer F127; and the poloxamer micelle wraps the surface of the nanometer zero-valent iron. According to the method, in a poloxamer aqueous solution, a solution of a strong reducing agent KBH4, a NaBH4 solution or a green tea solution is utilized to reduce Fe2+ so that Fe0 can be obtained. According to the micelle modified nanometer zero-valent iron particle and the preparation method and the application of the micelle modified nanometer zero-valent iron particle, the nanometer zero-valent iron is modified through the poloxamer, the micelle is formed through self-assembly of the poloxamer in the aqueous solution, stabilization of the nanometer materials is achieved, the prepared nanometer particle is good in dispersing performance and high in reactivity, and the defects that the nanometer particle is prone to clustering in water and prone to oxidation in air are overcome. The pollutant removing capacity of the micelle modified nanometer zero-valent iron particle is far higher than that of a non-modified nanometer zero-valent iron particle, the micelle modified nanometer zero-valent iron particle is friendly to the environment, secondary pollution cannot be generated, equipment needed for preparation is simple, the process is simple and convenient, and the micelle modified nanometer zero-valent iron particle can be widely used for treatment of environmental pollution and the environment restoration field.

Description

Technical field [0001] The invention relates to the preparation and modification technology of nano materials, in particular to a micelle modified and modified nano zero-valent iron particle and a preparation method and application thereof. Background technique [0002] As an effective reducing agent and adsorbent, nano-zero-valent iron has the characteristics of small particle size, large specific surface area, large electronegativity, and strong reducibility, so it has superior adsorption performance and high reduction activity. Compared with ordinary zero-valent iron, the unique surface effect and small size effect of nano-zero-valent iron greatly improve the reaction activity and processing efficiency of zero-valent iron particles. Nano-zero-valent iron technology is currently one of the most potential environmental remediation methods, providing a new technology platform for the environmental field, reducing and removing a variety of halogenated alkanes, halogenated olefins,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F9/24B82Y40/00C02F1/70C02F1/28
CPCB82Y40/00C02F1/281C02F1/705B22F9/24C02F2101/36C02F2101/308C02F2101/20C02F2101/12B22F1/16
Inventor 王向宇丛姗
Owner KUNMING UNIV OF SCI & TECH
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