Hydrothermal synthesis of well-dispersed TiO2 nano-crystals

authors	Yang, J; Mei, S; Ferreira, JMF
nationality	International
journal	JOURNAL OF MATERIALS RESEARCH
keywords	NANOSIZED TITANIA POWDERS
abstract	Well-dispersed anatase and rutile nano-particles were prepared via hydrothermal treatment of tetrabutylammonium hydroxide-peptized and HNO3-peptized sols at 240 degreesC. A broad particle size distribution of anatase crystals was observed in the nonpeptized TiO2 species hydrothermally treated at 240 degreesC. X-ray diffraction and transmission electron microscopy, as well as zeta potential measurement, were used to characterize the particles. The formation of the well-dispersed anatase and rutile particles from the peptized samples could be attributed to (i) homogeneous distribution of the component in the peptized sols, and (ii) the high long-range electrostatic forces between particles in the presence of both peptizers, which were not present in the nonpeptized samples. This work provided a new way to prepare nano-crystals of titania.
publisher	MATERIALS RESEARCH SOCIETY
issn	0884-2914
year published	2002
volume	17
issue	9
beginning page	2197
ending page	2200
digital object identifier (doi)	10.1557/JMR.2002.0323
web of science category	Materials Science, Multidisciplinary
subject category	Materials Science
unique article identifier	WOS:000177967800005