Phase transformation behavior at low temperature in hydrothermal treatment of stable and unstable titania sol

被引：37

作者：

So, WW

Park, SB

Kim, KJ

Moon, SJ

机构：

[1] KOREA RES INST CHEM TECHNOL,DIV CHEM ENGN,TAEJON 305600,SOUTH KOREA

[2] KOREA ADV INST SCI & TECHNOL,DEPT CHEM ENGN,TAEJON 305701,SOUTH KOREA

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1997年 / 191卷 / 02期

关键词：

nanosize titania; stable-unstable titania sol; hydrothermal treatment; phase transformation;

D O I：

10.1006/jcis.1997.4969

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nanosize titania soi mas prepared from titanium tetraisopropoxide (TTIP) and conditions for the formation of stable sol were identified, As the H+/TTIP mole ratio decreased and H2O/TTIP mole ratio increased, stable sol was likely to be formed, The size and crystallinity remained unchanged after hydrothermal treatment of the stable sol at between 160 and 240 degrees C, However, hydrothermal treatment of unstable sol produced rod-like particles and crystallinity of particles was changed from anatase to rutile. This difference in phase transformation at low hydrothermal treatment temperature was likely to be caused by the fact that stable sor remained to be-stable even after hydrothermal treatment, while unstable sol had a tendency to be aggregated. (C) 1997 Academic Press.

引用

页码：398 / 406

页数：9