Inventors:
Guoyi Fu - Ellicott City MD, US
BillieJo M. Monk - Glen Rock PA, US
Robert McIntyre - Highfields, GB
Assignee:
Millennium Inorganic Chemicals, Inc. - Hunt Valley MD
International Classification:
B01J 23/00
B01J 13/00
C01G 25/02
C01G 27/02
C01G 23/04
C01G 23/047
C09K 3/00
B01D 21/01
C08J 3/02
US Classification:
502350, 423608, 423609, 423610, 423611, 423612, 423613, 423614, 423615, 423616, 516 90, 516 99, 516922
Abstract:
A method of preparing stable, transparent photocatalytic titanium dioxide sols is disclosed which involves thermal treatment of a suspension of amorphous titanium dioxide in the presence of certain alpha-hydroxy acids. The sots comprise titanium dioxide particles in the anatase form having a crystallite size less than about 10 nm and exhibit excellent stability and transparency at basic, neutral, and acid pH.