Dispersion of Fatty Acid Surface Modified Ceria Nanocrystals in Various Organic Solvents

被引：37

作者：

Arita, Toshihiko ^{[2
]}

Ueda, Yu ^{[2
]}

Minami, Kimitaka ^{[1
]}

Naka, Takashi ^{[2
]}

Adschiri, Tadafumi ^{[1
]}

机构：

[1] Tohoku Univ, WPI Res Ctr, Adv Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

[2] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2010年 / 49卷 / 04期

关键词：

SUPERCRITICAL HYDROTHERMAL SYNTHESIS; NANOPARTICLES;

D O I：

10.1021/ie901319c

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Ceria (CeO2) nanocyrstals which could be transparently dispersed in several organic solvents were synthesized by organic-ligand-assisted hydrothermal synthesis. We have studied the dispersity of the nanocrystals into typical organic solvents using dynamic light scattering (DLS) measurement. The mean diameter of the dispersant (the nanocrystals' cluster) varied with changing the solvent species. When the solubility parameter (SP) values of the solvent and the modifier were comparable to each other, the nanocrystals tended to disperse in the solvent with the initial particle size. One of the three-dimensional SPs, i.e., the Hansen solubility parameters, brought more detailed understanding of the mechanism of the dispersion of the surface modified nanocrystals. Because of the dense modifier layer on the surface of the ceria nanocrystals, the hydrogen bonding ability of the solvent was not the dominant factor to determine dispersion of the surface modified nanocrystals. The dispersion and polar factors of the Hansen SPS Could describe the ideal condition of perfect dispersion of the surface modified CeO2 nanocrystals.

引用

页码：1947 / 1952

页数：6

共 18 条

[1] Supercritical hydrothermal synthesis of organic-inorganic hybrid nanoparticles [J].