Nanocrystallinetitaniaasphotocatalysthasattractedconsiderableattentionforitspotentialuseinenvironmentalcleaning.Recently,lanthanideionsdopedtitaniasampleshavebeenshowntoincreasethephotocatalyticefficiencyofselectedreactions.Inthiswork,TiO2nanoparticlesdopedwithEr3+werepreparedviaanultrasonicassistedsol-gelmethod.Theopticalpropertiesofthesamplesweredeterminedbyphotoacoustic(PA)spectroscopy.Itwasfoundthattheabsorptionedgeshiftedtolowerwavelengthw...
