Method of preparing cerium oxide nano-plate

Abstract

The invention relates to a method for preparing a cerium oxide nanometer slice, which belongs to the technical field of the preparation of inorganic nanometer materials, and comprises the main steps as follows: (1) the preparation of a cerium salt mixture liquor: chemometry cerium salt of 0.3-1.0mmol and hexadecyl trimethyl ammonium bromide are dissolved by using an appropriate amount of deionized water and made into a mixture liquor; (2) hydro-thermal reaction: the obtained mixture liquor is added with an appropriate amount of ammonia and subjected to ultrasonic dispersion, and then hydro-thermal reaction is carried out for 1-3 days at the temperature of 100-180 DEG C; afterwards, centrifuge separation is carried out, the obtained precipitate is washed by using deionized water so as to lead the pH value to be 7 and neutral, and then drying is carried out at 60 DEG C so as to obtain the cerium oxide nanometer slice. The shape of the cerium oxide nanometer slice obtained by the method is square, or rhombus, or hexagon, with the size of 20-80nm and the thickness of 3-5nm.

Description

technical field [0001] The invention relates to a method for preparing cerium oxide nanosheets, belonging to the technical field of inorganic nanomaterial preparation technology. Background technique [0002] my country is rich in rare earth resources, and its industrial reserves rank first in the world. Among them, cerium oxide, as a rare earth compound, accounts for about 50% of the proven reserves of rare earths. It has important applications in automobile exhaust purification, solid fuel cells, catalytic cracking of fluids, and chemical mechanical polishing abrasives. Due to its special properties such as large specific surface area, small grain size and high surface activity of specific nanostructures, cerium oxide nanostructures have become one of the hot spots in the synthesis of cerium oxide. [0003] Japanese patent JP2004107186 proposes a method for preparing cerium oxide nanospheres with a diameter of about 50 nm by thermal decomposition. Although the yield of t...

AI Technical Summary

Problems solved by technology

[0003] Japanese patent JP2004107186 proposed a method for preparing cerium oxide nanospheres with a diameter of about 50 nm by thermal decomposition. Although the yield of this method is large, the solid nanospheres reduce the specific surface area of ​​cerium oxide and reduce its catalytic performance.

US2008051283 proposes a method for preparing cerium oxide nanoparticles with a size of 50-1000nm by hydrothermal method. Since it does not use other templates, the uniformity of its particle size is poor

Chinese patent CN1683248 proposes a method for preparing cerium oxide nanoparticles by the coordination precipitation method. Although the size of the nanoparticles is 5-10nm, they are easily agglomerated together, which affects their specific surface area, thereby reducing the cerium oxide. performance

And easy to reunite is also their common defect

Images