Transparent, stable titanium dioxide sols

Details Transparent, stable titanium dioxide sols Transparent, stable titanium dioxide sols

B - Operations, Transporting

01

J

B01J 21/06 (2006.01) B01J 37/02 (2006.01)

Patent

CA 2697542

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 sols 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.

L'invention porte sur un procédé de préparation de sols de dioxyde de titane photocatalytique, transparents, stables, qui met en jeu un traitement thermique d'une suspension de dioxyde de titane amorphe en présence de certains alpha-hydroxy acides. Les sols comprennent des particules de dioxyde de titane dans la forme anatase ayant une dimension de cristallite inférieure à environ 10 nm et présentent une excellente stabilité et une excellente transparence à pH basique, neutre et acide.

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