Nucleation and Crystal Growth of Nanocrystalline Anatase and Rutile Phase TiO2 from a Water-Soluble Precursor

被引：83

作者：

Kinsinger, Nichola M. ^{[1
]}

Wong, Ashley ^{[1
]}

Li, Dongsheng ^{[1
]}

Villalobos, Fabian ^{[1
]}

Kisailus, David ^{[1
]}

机构：

[1] Univ Calif Riverside, Dept Chem & Environm Engn, Riverside, CA 92521 USA

来源：

CRYSTAL GROWTH & DESIGN | 2010年 / 10卷 / 12期

关键词：

TITANIUM-DIOXIDE; SOL-GEL; HYDROTHERMAL CONDITIONS; PHOTOCATALYTIC ACTIVITY; ORIENTED ATTACHMENT; LOW-TEMPERATURE; PARTICLE-SIZE; FILMS; HYDROLYSIS; STABILITY;

D O I：

10.1021/cg101105t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Titanium dioxide (TiO2) has been widely used as an advanced semiconductor and as a white pigment for many years In recent years, TiO2 has gained much more interest for its semiconducting properties for use as photocatalytic and photovoltaic materials Understanding the fundamental nucleation and growth mechanisms is crucial to controlling micro structure and properties for these applications Nanosized nude and anatase particles were synthesized from a water-soluble titanium(IV) precursor using a hydrothermal method The impact of various hydrothermal conditions on the formation phase morphology, and grain size of the TiO2 products was investigated using XRD, TEM and FTIR At near neutral pH aggregated rutile rods are formed By increasing the alkalinity of the reaction medium, the anatase phase was favored and, as expected larger particle sizes resulted from longer duration reactions The effects of reaction conditions are discussed with respect to coordination chemistry and coarsening mechanisms

引用

页码：5254 / 5261

页数：8

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