Preparation of a UV-absorbed Transparent Monolithic Titanium Oxide Gel by the Catalytic Sol-Gel Process with a Phenanthroline Hydrochloride Catalyst

UV-absorbed transparent monolithic titanium oxide gels were prepared by the catalytic sol-gel process with 1,10phenanthroline hydrochloride and n-butylamine. When 1,10-phenanthroline was added to the precursor solution, transmittance of the gels increased. The higher the content of 1,10-phenanthroline hydrochloride and the lower content of water, the more transparent gel was formed. The transparent titanium oxide gels were obtained by reducing hydrolysis and promoting polycondensation.