Preparing method of [Bmim] BF4 dispersed nano-iron particle

Abstract

The invention discloses a preparing method of a [Bmim] BF4 dispersed nano-iron particle and relates to a preparing method of iron particles. According to the preparing method, soluble ferrous iron or trivalent iron is dissolved in distilled water (or mixed liquor of distilled water and ethyl alcohol) in a salting-in mode by adding of a certain dispersing agent and with the liquid phase chemical reduction method to form ferric salt solution, iron ions are then directly reduced to zero-valent iron by means of a reducing agent with a strong reducing property such as hydroboron, the product obtained in this way is treated with vacuum drying after being filtered and washed, and then a nano-iron powder material with good dispersing performance and a nanometer microstructure is obtained. The nano-iron particle prepared with the method is spherical, small in diameter, small in particle size range and oxidation resistant. The nano-iron particle is good in dispersing performance, and therefore the problem that nano-iron particles are agglomerated easily is effectively solved. The product is high in purity and small and even in diameter, the technology is simple and easy to control, the method can be carried out at normal temperatures and pressures, and actual production requirements are met.

Description

technical field [0001] The invention relates to a method for preparing iron particles, in particular to a method for preparing [Bmim]BF4 dispersed nanometer iron particles. Background technique [0002] Generally, powders or materials with a particle size in the range of 1 to 100 nanometers (nm) are called nanomaterials. Nanomaterials are widely used in various fields because of their unique properties. Because of its transition region between macroscopic conventional fine powder and microscopic atomic clusters, nano-iron exhibits some unique properties, one of which is the surface effect. Due to its small particle size, large specific surface area, and strong surface activity, nano-iron has more unique advantages than ordinary iron powder in the remediation of pollutants. Many foreign studies have shown that nano-iron can reduce and remove many pollutants in water, such as dissolved organic chlorides, PCBs and nitrobenzene compounds. [0003] Due to the small particle si...

AI Technical Summary

Problems solved by technology

[0003] Due to the small particle size, strong activity, easy coalescence, and easy oxidation of nano-iron, it is often used on the spot and must be isolated from oxygen during preparation and use. It is inconvenient to use and high in cost. Therefore, it is limited in practical applications. At present, the commonly used preparation methods are physical method and chemical method

Some methods are theoretically feasible, but the actual operating conditions are very demanding and not easy to implement