%0 Journal Article
%T CatalyticpropertiesofnanosizedzincaluminatespreparedbygreenprocessusingOpuntiadileniihawplantextract
%A C. Ragupathi
%A J. Judith Vijaya
%A S. Narayanan
%A L. John Kennedy
%A Seeram Ramakrishna
%J ´ß»¯Ñ§±¨
%P 1951-1958
%D 2013
%R 10.1016/S1872-2067(12)60682-2
%X £¿Variousnanosizedzincaluminate(ZnAl2O4)sampleswerepreparedbyaconventionalandamicrowavemethodbothwithandwithoutusingOpuntiadileniihawplantextract,andwerecharacterizedbyX-raydiffraction(XRD),Fouriertransforminfraredspectroscopy(FT-IR),highresolutionscanningelectronmicroscopy(HRSEM),energydispersionscanning(EDX),temperaturedependentconductancemeasurements,thermoelectricpowermeasurements,ultraviolet-visible(UV-Vis)diffusereflectancespectroscopy,andphotoluminescencespectroscopy.TheformationofapureZnAl2O4phasewasconfirmedbyXRDandFT-IR.Achangeinmorphologyfromnanosizedplatestonanosizedsheetswith,respectively,theconventionalandmicrowaveheatingmethodswasclearlyshownbyHRSEM.UV-VisdiffusionreflectancespectroscopymeasuredthebandgapsofZnAl2O4nanosizedplatesandnanosizedsheetsas3.5and3.9eV,respectively.ThesynthesizedZnAl2O4wassinglecrystallineandhasthreephotoluminescenceemissionsat482,528,and540nm.ZnAl2O4nanosizedsheetspreparedbythemicrowavemethodshowedhighercatalyticactivityfortheoxidationofbenzylalcohol(85%conversion)thanZnAl2O4nanosizedplatespreparedbytheconventionalmethod(60%conversion).
%K Greensynthesis
%K Zincaluminate
%K Spinel
%K Microwave
%K Opticalproperty
%U http://www.chxb.cn/CN/abstract/abstract21156.shtml