Preparation method of dispersant modified iron nanoparticles

A dispersant and nano-iron technology, applied in the field of preparation of nano-iron particles, can solve the problems of dechlorination system promotion or inhibition, insufficient use of surfactants, control of nano-particle size, etc., and achieve easy engineering. Application, improved stability, enhanced surface attractive effect

Inactive Publication Date: 2012-08-01
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

Its limitations are: on the one hand, there are many types of surfactants, and their promotion or inhibition on the dechlorination system is still controversial; on the other hand, the current application does not make full use of surfactants to control the size of nanoparticles and the stability of dispersion. sex
[0007] (3) Polymers such as polyethylene glycol, polyacrylic acid, carboxymethylcellulose, polyvinylpyrrolidone, etc. have played an important role in reducing the size of nano-palladium/iron bimetallic particles and enhancing their dispersion stability, but The concentration and dosage of polymer modified nanoparticles, the existing form of the polymer, and the complexity of the synthesis method have become one of

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  • Preparation method of dispersant modified iron nanoparticles
  • Preparation method of dispersant modified iron nanoparticles
  • Preparation method of dispersant modified iron nanoparticles

Examples

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Example Embodiment

[0035] Example 1: Preparation of polymethyl methacrylate PMMA dispersed modified iron nanoparticles and its removal of various chlorinated organics in water, the specific content is as follows:

[0036] (1) Preparation of PMMA dispersed modified iron nanoparticles and its dechlorination effect

[0037] Take 10mL of PMMA anisole solution with a mass percentage of 7% and 200mL with a concentration of 0.1mol / L FeSO 4 After the solution is mixed, stir for 10min, add an excess of 0.2mol / L KBH to the above mixed solution dropwise 4 Mix the solution in 200 mL and stir. After the addition is complete, delay stirring for 15 minutes until the reaction is complete, filter and drain with a vacuum filter device, wash with deionized water 3 times, filter with suction to dryness, and then wash 3 times with absolute ethanol , Acetone washed once, drained, put it into a vacuum drying oven at 100°C for 6h, ground under nitrogen, sealed and stored to obtain PMMA dispersed modified nano iron particles....

Example Embodiment

[0043] Example 2: Preparation of PMMA dispersed modified nano-palladium / iron particles and its removal of various chlorinated organics in water, the specific content is as follows:

[0044] (1) Preparation of PMMA dispersed modified nano-palladium / iron bimetallic particles and its dechlorination effect

[0045] Take 10mL of PMMA anisole solution with a mass percentage of 8% and 200mL with a concentration of 0.1mol / L FeSO 4 After the solution is mixed, stir for 10 minutes, add an excess of 0.2mol / LKBH to the above mixed solution dropwise 4 Add 200mL of the solution and stir. After the addition is complete, delay stirring for 15 minutes until the reaction is complete. Filter and drain with a vacuum filtration device. Wash with deionized water for 3 times. Pour the drained zero-valent iron nanoparticles into palladium acetate In the ethanol solution, react for 30 minutes under magnetic stirring, place the reaction product in a sand core filter device to suction and filter to dryness, a...

Example Embodiment

[0050] Example 3: Preparation of CTAB dispersion modified nano-nickel / iron particles and its removal of various chlorinated organics in water, the specific content is as follows:

[0051] (1) Preparation of CTAB dispersion modified nano-nickel / iron bimetallic particles and its dechlorination effect

[0052] Take 10 mL of cetyltrimethylammonium bromide solution with a concentration of 10% by mass (using ethanol with a concentration of 70% by mass as a solvent) and 250 mL with a concentration of 0.15mol / L FeSO 4 After the solution is mixed, stir for 10 minutes, and add an excess of 0.3mol / LKBH to the above mixed solution dropwise 4 Add 200 mL of the solution and stir. After the addition is complete, delay stirring for 12 minutes until the reaction is complete. Filter and drain with a vacuum filter device. Wash twice with deionized water, and immerse the zero-valent nano-iron particles obtained by draining to a concentration of 120 mg. / L of nickel chloride (NiCl 2 ) In the solution, r...

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Abstract

The invention discloses a preparation method of dispersant modified iron nanoparticles. According to the preparation method, high polymer, a cationic surfactant or anionic polymer electrolyte is used as a dispersant to perform surface modification on particles in a preparation process of the iron nanoparticles so as to prepare the dispersant modified iron nanoparticles. The iron nanoparticles prepared by the method have good dispersion stability; the hard agglomeration of the iron nanoparticles in an aqueous medium is reduced; the dispersion degree of the iron nanoparticles is increased; the method can also be used for performing dispersion modification on iron base bimetallic particles; and the method can be applied to pollution remediation of chlorinated organic compounds in an environmental medium and has broad application prospect.

Description

technical field [0001] The invention relates to a method for preparing nano-iron particles modified by a dispersant, and belongs to the technical field of nano-materials and water pollution control. Background technique [0002] Chlorinated organic compounds refer to products in which one or more hydrogens in the molecular structure of aliphatic hydrocarbons, aromatic hydrocarbons and their derivatives are replaced by chlorine. It accumulates in the body through skin absorption, etc., resulting in the "three effects" of teratogenicity, carcinogenicity, and mutagenicity. The potential risks to the environment and health are extremely high, and it has become one of the hot issues in current research. [0003] Traditional pollution control methods include physical, biological and chemical methods. Among them, the chemical reduction method, especially the zero-valent iron reduction method, has gradually replaced the traditional pollution control technology since it was discover...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J31/02B01J23/745B01J23/89B01J23/80B01J23/755B01J35/10C02F1/70C02F101/36
Inventor 王向宇祝敏平李芳
Owner KUNMING UNIV OF SCI & TECH
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