Method for preparing nanometer cerium oxide (CeO2) particles through microemulsion

A microemulsion and nanotechnology, applied in nanotechnology, chemical instruments and methods, rare earth metal compounds, etc., can solve the problems of limited particle application and development, uneven dispersion, product agglomeration, etc.

Active Publication Date: 2012-07-11
BEIJING UNIV OF TECH
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  • Claims
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Problems solved by technology

[0003] Currently preparing CeO 2 There are many particle methods, but there are generally problems such as serious agglomeration and uneven dispersion of the obtained products. The existence of these problems limits CeO 2 Application and Development of Particles

Method used

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  • Method for preparing nanometer cerium oxide (CeO2) particles through microemulsion
  • Method for preparing nanometer cerium oxide (CeO2) particles through microemulsion
  • Method for preparing nanometer cerium oxide (CeO2) particles through microemulsion

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Embodiment Construction

[0035] 1. Mix surfactant P507 and oil phase sulfonated kerosene evenly, wherein the mass ratios of P507 and sulfonated kerosene are 9:1, 8:2, 7:3, 6:4, 5:5, 4:6 respectively , 3:7, 2:8, 1:9.

[0036] 2. Use 2-10mol / L strong alkali solution NaOH to titrate the above-mentioned mixed solutions with different mass ratios to saponify them until a clear and uniform solution is obtained by visual observation. Determine the water / oil (W / O) according to the turbidity of the system ) of the microemulsion region. At this time, the system contains three substances, surfactant P507, sulfonated kerosene in the oil phase and strong alkali solution in the water phase. The ternary phase diagram is drawn according to the experimental data of the three components.

[0037]3. According to the specific embodiment, the mass ratio range of P507: sulfonated kerosene: NaOH (in terms of solid content) is 9.9~92.21: 4.72~89.11: 0.99~4.31, wherein the optimal range is 77.15~92.21: 4.72~19.29: From 3.07...

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Abstract

A method for preparing nanometer cerium oxide (CeO2) particles through microemulsion belongs to the field of manufacture of nanometer materials and includes the following steps that a microemulsion area is defined that the microemulsion is composed of 9.9 to 92.21 parts of surfactant 2- ethylhexyl phosphonic acid single 2- ethylhexyl-ester hereinafter referred to as P507, 4.72 to 89.11 parts of oil phase sulfonating kerosene and 0.99 part to 4.31 parts of water phase sodium hydroxide solution by mass proportion. Cerium salt solution is added into the microemulsion area under stirring effect to obtain a load organic phase, precipitator oxalate solution is added into the load organic phase to obtain a precursor, and the precursor is roasted for 1.5 to 6.5 hours under the temperature of 250 DEG C to 750 DEG C to obtain nanometer CeO2 ball particles with the powder feature of 10nm to 30nm. The nanometer CeO2 particles are free of obvious agglomeration and even in particle diameter distribution.

Description

1. Technical field [0001] The invention belongs to the field of preparation of nanomaterials, especially the preparation of nano CeO by microemulsion 2 particle method. 2. Background technology [0002] my country is rich in rare earth resources, accounting for more than 80% of the world's proven reserves, of which cerium is the most abundant. Rare earth oxide CeO 2 It is a relatively important light rare earth product, which has been widely used in luminescent materials, catalysts, electronic ceramics, ultraviolet absorbers, precision polishing materials, etc. And because of its superior oxygen storage and release function and high-temperature rapid oxygen vacancy diffusion ability, it has become a very promising automotive exhaust catalytic purification material, solid oxide fuel cell (SOFC) anode material, electrochemical reaction promotion material, etc. [0003] Currently preparing CeO 2 There are many particle methods, but there are generally problems such as serio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y40/00
Inventor 梅燕聂祚仁
Owner BEIJING UNIV OF TECH
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