Preparation method of flaky nano-cerium oxide

A nano-cerium oxide, flaky technology, which is applied in the field of preparation of flaky nano-cerium oxide by solution precipitation method, can solve the problems of equipment needing pressure resistance and corrosion resistance, inconvenient industrial scale-up production, cumbersome preparation steps, etc., to meet the production equipment and process conditions The effect of low requirements, demanding production conditions, and complex and harsh processes
CN103991891AInactive Publication Date: 2014-08-20EAST CHINA UNIV OF SCI & TECH
3 Cites 16 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
EAST CHINA UNIV OF SCI & TECH
Publication Date
2014-08-20
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a preparation method of flaky nano-cerium oxide, comprising the following steps: preparing an aqueous solution of water-soluble cerium salt and an aqueous solution of a precipitant carbonate; adding the aqueous solution of carbonate into the aqueous solution of cerium salt within the temperature range of 0-50 DEG C under the condition of stirring; continuously stirring to react for 0.2-2 h so as to obtain a precipitate solution; aging the precipitate solution for 0-48 h under stationary condition and at the temperature of 0-50 DEG C; collecting a precipitate from the precipitate solution; and washing, drying and roasting to obtain flaky nano-cerium oxide. Hydrothermal / alcohol-thermal processes are not required. Flaky nano-cerium oxide is synthesized at one step of solution precipitation reaction at low temperature. Problems of many required raw materials, complex process, harsh production conditions and the like by a hydrothermal / alcohol-thermal method, sol-gel method, micro-emulsion method or traditional liquid phase method are avoided. Technological conditions are mild and easy to control, and the preparation method is environmentally friendly and pollution-free.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of preparation of inorganic nanometer materials, and in particular relates to a method for preparing flaky nano cerium oxide by a solution precipitation method. Background technique

[0002] Cerium oxide has strong redox properties (Ce 3+ / C 4+ ), oxygen storage and release capacity, and its strong absorption capacity for ultraviolet rays, are widely used in modern high-tech fields such as gas sensors, optical materials, ultraviolet absorbers, high-temperature oxygen-sensitive materials, solid oxide fuel cells, and three-way catalysts. Especially as a catalytic material, it has outstanding advantages in the fields of three-way catalysis and catalytic oxidation (catalytic combustion of volatile organic pollutants), and the catalytic performance of cerium oxide is directly related to its morphology. Many studies have found that cerium oxide nanorods, nanowires or nanocubes with preferentially exposed (100), ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More