Dispersion of Phosphonic Acids Surface-Modified Titania Nanocrystals in Various Organic Solvents

被引：29

作者：

Arita, Toshihiko ^{[2
]}

Moriya, Ken-ichi ^{[4
]}

Yoshimura, Tomoka ^{[2
]}

Minami, Kimitaka ^{[1
]}

Naka, Takashi ^{[3
]}

Adschiri, Tadafumi ^{[1
]}

机构：

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

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

[3] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[4] Tohoku Univ, Grad Sch Sci, Dept Chem, Aoba Ku, Sendai, Miyagi 9808578, Japan

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2010年 / 49卷 / 20期

关键词：

NANOPARTICLES;

D O I：

10.1021/ie101074w

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Titanium dioxide (TiO2, anatase) nanocyrstals tha can be transparently (perfectly) dispersed in several organic solvents were synthesized by organic-ligand-assisted hydrothermal synthesis. To analyze the dispersion behavior of surface-modified nanocrystals from the surface of the surface-modified nanocrystals, three types of surface-modified TiO2 nanocrystals were prepared. Depending on the surface nature of the surface-modified Tila, nanocrystals, the nanocrystals showed different dispersion behaviors in organic solvents. In particular, the dispersion of surface-modified TiO2 nanocrystals with carboxylic acid terminated surface modifier (TiO2-COOH) varied strongly with changing solvent species. We investigated the dispersity of TiO2-COOH in typical organic solvents using dynamic light scattering (DLS) measurements. One of the three-dimensional solubility parameters, namely, the Hansen solubility parameter, provided detailed information on the mechanism of the dispersion of TiO2-COOH. Because of the carboxylic acid groups exhibited on the surface of the titania nanocrystals, the dispersion of TiO2-COOH was very much affected by the hydrogen-bonding ability of the solvent. The hydrogen-donating/-accepting ability adequately described the dispersion of TiO2-COOH in organic solvents.

引用

页码：9815 / 9821

页数：7

共 25 条

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