Novel process for preparing simple substance Fe nanometer particles at normal temperature and pressure in liquid phase original station

Abstract

The present invention relates to a new method of manufacturing nanometer particle of simple substance iron via liquid chemical reduction under normal temperature and pressure. Procedures are as following: malysite water solution of 0.1 to 0.2 mol / l FeCl 2 (or FeSO 4 ), water solution of hydrazine hydrate of 2 to 4 mol / l and water solution of 0.5 to 1.0 mol / NaOH are respectively prepared. Citric acid whose molar weight is 0.2 to 1.0 times as much as that of Fe is added into ferrous salt solution. Dispersant whose quantity is 1 to 5 per cent of total Fe quantity in the malysite water solution is added into NaOH solution. With 0.0T to o.6T addition of effect of magnetic field and continuously stirred, the malysite water solution and the hydrazine hydrate water solution are mixed together, and at the same time, the NaOH solution is added. After the NaOH solution is added, the malysite water solution and the hydrazine hydrate water solution continue to be continuously stirred for five minutes until reaction is over. With completion of separation, water-cleaning and vacuum drying processes, the nanometer particle of simple substance iron is obtained. The obtained nanometer particle of simple substance iron is spherical without being affected by the magnetic field. On the contrary, the nanometer particle of simple substance iron is rod-like. Raw materials adopted by the present invention are cheap and easy to get. The present invention has simple technology, which can have reaction under normal temperature and press. Therefore, the present invention is suitable for extensive industrialization produce.

Description

technical field [0001] The invention relates to a new method for preparing elemental iron nanoparticles, in particular to a new method for preparing elemental iron nanoparticles of different shapes in situ in a liquid phase at normal temperature and pressure. technical background [0002] With the progress of nanomaterials industry, elemental iron nanoparticles with many unique chemical and physical properties have begun to play an increasingly important role in various high-tech materials fields. Such as: high-density magnetic recording materials, magnetic liquid materials, catalyst materials (such as catalytic catalysts), electrical conductors and electromagnetic wave absorbing materials, biomedical carriers and corrosion-resistant coatings and other material science fields are increasingly widely used. In recent years, the research on the preparation technology and process, microstructure and performance characterization of elemental iron nanoparticles has attracted more ...

AI Technical Summary

Problems solved by technology

These factors also limit the application of such methods in large-scale industrial production.

Moreover, these methods can only obtain nanoparticles, and the shape of the obtained nano-iron particles cannot be controlled by simple means.