Production of TiO2 nanoparticles with controlled characteristics by means of a Vortex Reactor

被引：27

作者：

Marchisio, Daniele L. ^{[1
]}

Omegna, Federica ^{[1
]}

Barresi, Antonello A. ^{[1
]}

机构：

[1] Politecn Torino, Dipartimento Sci Mat & Ingn Chim, I-10129 Turin, Italy

来源：

CHEMICAL ENGINEERING JOURNAL | 2009年 / 146卷 / 03期

关键词：

Sol-gel; Titanium dioxide; Mixing; Titanium alkoxide; Computational fluid dynamics; Vortex Reactor; Population balance modelling; TITANIUM-DIOXIDE; PHOTOCATALYTIC PROPERTIES; NANOCRYSTALLINE TITANIA; PHASE-COMPOSITION; SCALE-UP; DEGRADATION; PHOTOACTIVITY; FILMS;

D O I：

10.1016/j.cej.2008.10.031

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this work titanium dioxide nanoparticle formation and evolution via the sol-gel route is investigated. Alcoholic solutions of titanium tetra-isopropoxide and water are mixed in a Vortex Reactor, where the mixing time can be accurately controlled by manipulating the inlet flow rates. Particle synthesis is carried out in operating conditions ranging from poor to excellent mixing performances and the effect of mixing on the formation of titanium dioxide nanoparticles and on their evolution is investigated from the modelling and the experimental view points. Experiments are in fact interpreted by using a simple population balance model and mixing in the reactor is accurately described by a computational fluid dynamics model based on the calculation of characteristics mixing times. Results show that particle formation is strongly influenced by mixing and that particle aggregation/condensation occurs in the reaction limited regime. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：456 / 465

页数：10

共 48 条

[1] Behaviour of nanoparticle (ultrafine) titanium dioxide pigments and stabilisers on the photooxidative stability of water based acrylic and isocyanate based acrylic coatings
Allen, NS
Edge, M
Ortega, A
Liauw, CM
Stratton, J
McIntyre, RB
[J]. POLYMER DEGRADATION AND STABILITY, 2002, 78 (03) : 467 - 478
[2] [Anonymous], 2003, Nanocomposite science and technology
[3] Effect of rutile phase on the photocatalytic properties of nanocrystalline titania during the degradation of p-coumaric acid
Bacsa, RR
Kiwi, J
[J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 1998, 16 (01) : 19 - 29
[4] Structural characterization of titanium-oxo-polymers synthesized in the presence of protons or complexing ligands as inhibitors
Blanchard, J
Ribot, F
Sanchez, C
Bellot, PV
Trokiner, A
[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS, 2000, 265 (1-2) : 83 - 97
[5] Brinker C.J., 2013, Sol-gel science, The physics and chemistry of sol-gel processing, DOI [DOI 10.1016/B978-0-08-057103-4.50001-5, 10.1016/C2009-0-22386-5]
[6] Synthesis and microstructure control of nanocrystalline titania powders via a sol-gel process
Ding, XZ
Liu, XH
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1997, 224 (1-2): : 210 - 215
[7] Fox RO., 2003, COMPUTATIONAL MODELS, DOI 10.1017/CBO9780511610103
[8] Fujishima A., 2000, J. Photochem. Photobiol. C: Photochem. Rev., V1, P1, DOI [10.1016/S1389-5567(00)00002-2, DOI 10.1016/S1389-5567(00)00002-2]
[9] On the importance of mixing for the production of nanoparticles
Gavi, E.
Marchisio, D. L.
Barresi, A. A.
[J]. JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY, 2008, 29 (04) : 548 - 554
[10] CFD modelling of nano-particle precipitation in confined impinging jet reactors
Gavi, E.
Rivautella, L.
Marchisio, D. L.
Vanni, M.
Barresi, A. A.
Baldi, G.
[J]. CHEMICAL ENGINEERING RESEARCH & DESIGN, 2007, 85 (A5) : 735 - 744

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