Preparation of nanosized crystalline TiO2 particles at low temperature for photocatalysis

被引:180
作者
Watson, S [1 ]
Beydoun, D [1 ]
Scott, J [1 ]
Amal, R [1 ]
机构
[1] Univ New S Wales, Ctr Particle & Catalyst Technol, Sch Chem Engn & Ind Chem, Sydney, NSW 2052, Australia
关键词
nanoparticles; photocatalysis; TiO2; rutile; anatase; brookite; particle preparation;
D O I
10.1023/B:NANO.0000034623.33083.71
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Nanocrystalline titanium dioxide (TiO2) particles were prepared by a modified alkoxide method under acidic conditions at temperatures ranging from 60degreesC to 90degreesC. The reaction temperature was used to control the crystalline phase of the TiO2 particles. At 60degreesC and 75degreesC rutile was formed whilst at 90degreesC anatase and brookite were formed. The photocatalytic activity of the prepared particles was tested for the degradation of sucrose. The photocatalytic activities of the prepared nanosized TiO2 were compared to those obtained from Degussa P-25 TiO2 as well as TiO2 crystalline samples prepared using the conventional sol-gel/heat treatment method. At low organic concentrations, Degussa P-25 exhibited higher photocatalytic behaviour than all the prepared particles while, at high organic concentrations, the nanosized TiO2 particles prepared at low temperature displayed an activity comparable to Degussa P-25 but much higher than the heat treated sample. The formation of excess intermediates during the degradation of higher sucrose loadings is believed to hinder the photoactivity of Degussa P-25, while the prepared TiO2 particles are able to maintain their activity for the degradation of the intermediates of sucrose.
引用
收藏
页码:193 / 207
页数:15
相关论文
共 48 条
[1]   IMPROVED PHOTOCATALYST OF TIO2/SIO2 PREPARED BY A SOL-GEL SYNTHESIS [J].
ANDERSON, C ;
BARD, AJ .
JOURNAL OF PHYSICAL CHEMISTRY, 1995, 99 (24) :9882-9885
[2]  
Aruna ST., 1996, J Mater Synth Process, V4, P175
[3]   PHOTOCATALYTIC DEGRADATION OF PHENOL IN AQUEOUS TITANIUM-DIOXIDE DISPERSIONS [J].
AUGUGLIARO, V ;
PALMISANO, L ;
SCLAFANI, A ;
MINERO, C ;
PELIZZETTI, E .
TOXICOLOGICAL AND ENVIRONMENTAL CHEMISTRY, 1988, 16 (02) :89-109
[4]   Effect of rutile phase on the photocatalytic properties of nanocrystalline titania during the degradation of p-coumaric acid [J].
Bacsa, RR ;
Kiwi, J .
APPLIED CATALYSIS B-ENVIRONMENTAL, 1998, 16 (01) :19-29
[5]   Rutile formation in hydrothermally crystallized nanosized titania [J].
Bacsa, RR ;
Gratzel, M .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1996, 79 (08) :2185-2188
[6]   A STRUCTURAL INVESTIGATION OF TITANIUM-DIOXIDE PHOTOCATALYSTS [J].
BICKLEY, RI ;
GONZALEZCARRENO, T ;
LEES, JS ;
PALMISANO, L ;
TILLEY, RJD .
JOURNAL OF SOLID STATE CHEMISTRY, 1991, 92 (01) :178-190
[7]   Local order in titania polymorphs [J].
Bokhimi, X ;
Morales, A ;
Aguilar, M ;
Toledo-Antonio, JA ;
Pedraza, F .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2001, 26 (12) :1279-1287
[8]  
Chen D., 2000, Developments in Chemical Engineering and Mineral Processing, V8, P505, DOI [10.1002/apj.5500080507, DOI 10.1002/APJ.5500080507]
[9]   Poly(tetraethylene glycol malonate) titanium oxide hybrid materials by sol-gel methods [J].
Deng, C ;
James, PF ;
Wright, PV .
JOURNAL OF MATERIALS CHEMISTRY, 1998, 8 (01) :153-159
[10]   Synthesis of anatase TiO2 supported on porous solids by chemical vapor deposition [J].
Ding, Z ;
Hu, XJ ;
Yue, PL ;
Lu, GQ ;
Greenfield, PF .
CATALYSIS TODAY, 2001, 68 (1-3) :173-182