%0 Journal Article
%T PreparationandCharacterizationofHighActivityZirconium-DopedAnataseTitaniaforSolarPhotocatalyticDegradationofEthidiumBromide
%A S. SWETHA
%A R. GEETHA BALAKRISHNA
%J ´ß»¯Ñ§±¨
%P 789-794
%D 2011
%R 10.1016/S1872-2067(10)60200-8
%X £¿Ethidiumbromideisafluorescenttagandisusedinbiomedicalapplications.ItisapotentmutagenbecauseofitsDNAintercalatingnature.Acatalystcompositionforthefeasibleeliminationofethidiumbromideusingabroadspectrumofsolarradiationwasinvestigated.NanostructuredanataseTiO2wassynthesizedbygeltocrystallineconversionanditsbandgapwasengineeredbydopingwithzirconiumtoeffectivelyharnesssunlight.ThedopednanocrystalswerecharacterizedbyX-raydiffraction,scanningelectronmicroscopy,transmissionelectronmicroscopy,energydispersiveX-rayanalysis,andUV-Visspectroscopy.Theformedcrystalsretainedtheanatasephasewithamarginalincreaseinsize.ThepulverizationprocessusedtodopeZrintotitaniaresultedinananoanddopedlatticewithanincreasedandextendedlightabsorptionrange,whichgaveanearlyfive-foldincreaseinphotoactivityoverpuretitania.Thecatalyticeffectofthemodifiedtitania,thedopantconcentration,andthedynamicsofthedopantconcentrationonthechargecarriers(trapping-recombination)forthedegradationofthemutagenwasinvestigated.Themodifiedtitaniaiscapableoftotalethidiumbromideeliminationinsunlight.ThelossofitsmutagenicpropertywasconfirmedbyanAmestest.Theinducedrevertantcoloniesobservedwerenilinthetreatedsampleindicatingacompletelossoftheintercalatingpropertyofthemutagen.
%K sunlight
%K titania
%K zirconium
%K ethidiumbromide
%K elimination
%U http://www.chxb.cn/CN/abstract/abstract20374.shtml