Research On Microwave Preparation And Photo-catalytic Capability Of Nano Zinc Oxide

In this paper, We preared nano-ZnO and modified nano-ZnO compoud photocatalyticmaterial by microwave methods and studied the photocatalytic performance of thesystem.With the help of experimental techniques,such as XRD,FTIR and Specific surfaceareas determination,We studied sysematically nano-ZnO and modified nano-ZnO compoundphotocatalyst,the characteristics of photocatalysis for treating CTAB（cetyltriethylammnoniumbromide）and the possibilities of their regeneration.The main contents and results of thispaper are included as following:In Zn（NO₃）₂.6H₂O-triethanolamine system,this paper investigates the influential factorsof nano-ZnO photocatalytic material by microwave irradiation.Nano-ZnO as a catalyst forphotocatalytic reduction of CTAB, the influences of the microwave power, microwavereaction time, the initial solution concentration, the amount of catalyst, the initial solution pHon the performance of reduction of CTAB，are researched. On the photocatalytic activity ofZnO as evaluation factors,we have studied the effect of different reaction conditions on theZnO crystal, determined the main factors affecting ZnO crystallites and the best preparationtechnology by changing the microwave power and microwave reaction time.The bestconditions are shown as follows:640w of microwave power,10min of microwave reactiontime,0.4g/L of the initial solution concentration,0.15g of the amount of catalyst,9of theinitial solution pH. The degradation rate of CTAB reached83.7%.We have alse discussed the doped with rare earth metal ions to improve its photocatalyticdegradation activity, researched influences on the photocatalytic activity of the doped withZnO crystallites doped ions such as the doping amount,the microwave power, microwavereaction time, the amount of catalyst, the initial solution concentration, the initial solution pH.Ce-doped ZnO nanocrystalline had higher degradation activity for CTAB than pure ZnO inUV. The best preparation technology by800w of the microwave power and15min ofmicrowave reaction time, is most completely by ZnO with0.35Ce-doped.We test thephotocatalyst activity of Ce-doped ZnO nanocrystals,the sample have strong photocatalystactivity for photodegrated CTAB, and degradation rate of CTAB was91.0%, The optimalconditions are shown as follows:0.4g/L of the initial solution concentration,0.01g of theamount of catalyst,7of the initial solution pH.