高产率溶胶-凝胶法合成分散良好的无色ZrO(2)纳米晶体。

High-yield sol-gel synthesis of well-dispersed, colorless ZrO(2) nanocrystals.

作者信息

Mizuno Mikihisa, Sasaki Yuichi, Lee Sungkil, Katakura Hitoshi

机构信息

Sony Corporation, Sendai Technology Center, 3-4-1 Sakuragi, Tagajo, Miyagi 985-0842, Japan.

出版信息

Langmuir. 2006 Aug 15;22(17):7137-40. doi: 10.1021/la060774e.

DOI:10.1021/la060774e

PMID:16893205

Abstract

A 93% high-yield synthesis of well-dispersed, colorless zirconium dioxide (ZrO(2)) nanocrystals is reported. In this synthesis, hydrolysis and condensation reactions of zirconium(IV) tert-butoxide in the presence of oleic acid (100 degrees C) formed ZrO(2) precursors. The ZrO(2) precursors were made of -Zr-O-Zr- networks surrounded by oleic acid molecules. Annealing (280 degrees C) the precursors dispersed in dioctyl ether caused crystallization of the -Zr-O-Zr- networks, thereby generating 4 nm ZrO(2) nanocrystals stabilized with oleic acid. The particles were highly crystalline and tetragonal phase. A dense ZrO(2) nanocrystal dispersion in toluene (280 mg/mL) showed a transmittance of about 90% (3 mm optical path length) in the whole visible region.

摘要

据报道，一种可高产率合成93%的、分散良好的无色二氧化锆（ZrO₂）纳米晶体的方法。在该合成过程中，在油酸存在下（100℃），叔丁醇锆的水解和缩合反应形成了ZrO₂前驱体。ZrO₂前驱体由被油酸分子包围的-Zr-O-Zr-网络构成。对分散在二辛醚中的前驱体进行退火处理（280℃），会使-Zr-O-Zr-网络结晶，从而生成用油酸稳定的4nm ZrO₂纳米晶体。这些颗粒具有高度结晶性且为四方相。在甲苯中形成的致密ZrO₂纳米晶体分散体（280mg/mL）在整个可见光区域的透光率约为90%（光程长度为3mm）。