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Preparation of alpha-FeOOH nano-rod

A nanorod and concentration technology, applied in the direction of iron oxide/iron hydroxide, etc., can solve the problems of difficult control of product quality, low production cost, high production cost, etc., achieve uniform shape, reduce production cost, and simple and easy preparation method Effect

Inactive Publication Date: 2009-05-20
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former two mostly use ferrous sulfate as raw material, the production cost is low, but the product quality is difficult to control; the latter two have good product quality, but the production cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare 10mL Fe 3+ and Fe 2+ Iron salt mixed aqueous solution, iron salt mixed aqueous solution Fe 3+ The concentration of ions is 0.08mol / L, Fe 2+ The concentration is 0.04mol / L, add 50mL ethanol and 0.5g F127, stir evenly, drop NaOH solution with a concentration of 0.5mol / L into the mixed solution at room temperature until the pH of the mixed solution is 10~11, and continue to stir After about 1 hour, the reaction system was exposed to the air and aged at room temperature for 24 hours. The sample is collected by suction filtration or centrifugal washing to obtain a product, that is, α-FeOOH nanorods with a uniform shape and a diameter of about 20 nm and a length of 200-300 nm.

Embodiment 2

[0026] Prepare 10mL Fe 3+ and Fe 2+ Iron salt mixed aqueous solution, iron salt mixed aqueous solution Fe 3+ The ion concentration is 0.2mol / L, Fe 2+ The concentration is 0.1mol / L, add 50mL ethanol and 0.8g F127, stir evenly, add NaOH solution with a concentration of 0.5mol / L to the mixed solution at room temperature until the pH of the mixed solution is 10~11, and continue to stir After about 1 hour, the reaction system was exposed to the air and aged at room temperature for 24 hours. The sample is collected by suction filtration or centrifugal washing to obtain a product, that is, α-FeOOH nanorods with a uniform shape and a diameter of about 20 nm and a length of 200-300 nm.

Embodiment 3

[0028] Prepare 20mL Fe 3+ and Fe 2+ Iron salt mixed aqueous solution, iron salt mixed aqueous solution Fe 3+ The ion concentration is 0.48mol / L, Fe 2+ The concentration is 0.24mol / L, add 100mL ethanol and 1.0g F127, stir evenly, drop NaOH solution with a concentration of 1mol / L into the mixed solution at room temperature until the pH of the mixed solution=10~11, continue to stir for about After 1 hour, the reaction system was exposed to the air and aged at room temperature for 24 hours. The sample is collected by suction filtration or centrifugal washing to obtain α-FeOOH nanorods with a diameter of about 20 nm and a length of 200-300 nm with a uniform shape.

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Abstract

The invention relates to a preparation method of an alpha-FeOOH nano rod with uniform appearance, which belongs to the technical field of inorganic nonmetal nano material preparation. The preparation method of the alpha-FeOOH nano rod provided by the invention comprises the steps of: adding ethanol and the triblock copolymer of polyoxyethylene-polyoxypropylene-polyoxyethylene (PEO-PPO-PEO) into the mixed aqueous solution of Fe<3> and Fe<2+>, then adding an NaOH solution until the pH of the mixed solution is 10-11, stirring and aging the mixed solution for 24 hours at room temperature to obtain a suspension, filtering or centrifugalizing the suspension to obtain solid precipitate, washing and then drying the precipitate at 30-50 DEG C to obtain the alpha-FeOOH nano rod. The alpha-FeOOH nano rod has uniform appearance, diameter of 20nm and length of 200-300nm, and can be used in the fields of dyeing, catalysis, gas detection, magnetic record, and the like. The preparation method which is simple and accessible can be implemented at normal temperature and normal pressure, thus remarkably reducing production cost.

Description

technical field [0001] The invention relates to a method for preparing α-FeOOH nanorods with uniform appearance, and belongs to the technical field of preparation of inorganic non-metallic nanometer materials. Background technique [0002] α-FeOOH, also known as iron yellow, is an important raw material in chemical production and is widely used in dyes, catalysis, gas detection, magnetic recording, soft and hard magnetic materials, etc. α-FeOOH has been used as a pigment or as a preparation of α-Fe 2 o 3 and γ-Fe 2 o 3 raw materials. Acicular or rod-shaped α-FeOOH particles are used in many fields such as basic research, chemical industry, colloid and surface chemistry. For example, α-FeOOH nanorods have shown promising application prospects in the research of inorganic liquid crystal materials. In the industry, the magnetic powder used as the basic raw material of magnetic recording media is currently the most used acicular γ-Fe 2 o 3 It and its coatings are general...

Claims

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Application Information

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IPC IPC(8): C01G49/02
Inventor 姜继森杨勇
Owner EAST CHINA NORMAL UNIV
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