Dopant-free, polymorphic design of TiO sub(2 nanocrystals by flame aerosol synthesis)

A dopant-free aerosol synthesis of highly crystalline TiO sub(2 nanoparticles (20-35 nm) with tunable polymorphic content is demonstrated by rapid flame spray pyrolysis. By controlling precisely the total ambient oxygen partial pressure of the combustion in a quartz tube enclosure, anatase content a...

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Bibliographic Details
Published in:Chemical engineering science 2011-06, Vol.66 (11), p.2409-2416
Main Authors: Kho, Yung Kent, Teoh, Wey Yang, Maedler, Lutz, Amal, Rose
Format: Article
Language:English
Subjects:
Aerosols
Anatase
Combustion
Crystallites
Nanocrystals
Rutile
Synthesis
Titanium dioxide
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Summary:A dopant-free aerosol synthesis of highly crystalline TiO sub(2 nanoparticles (20-35 nm) with tunable polymorphic content is demonstrated by rapid flame spray pyrolysis. By controlling precisely the total ambient oxygen partial pressure of the combustion in a quartz tube enclosure, anatase content as high as 96 wt% (4 wt% rutile) was obtained at high oxic flame conditions, while rutile content as high as 94 wt% (6 wt% anatase) was obtained under anoxic flames. The polymorphic variability lies within a narrow range of combustion equivalence ratios, that is, 1.0
ISSN:0009-2509
DOI:10.1016/j.ces.2011.02.058