%0 Journal Article
%T Low-temperaturegraphitizationofamorphouscarbonnanospheres
%A Katia Barbera
%A Leone Frusteri
%A Giuseppe Italiano
%A Lorenzo Spadaro
%A Francesco Frusteri
%A Siglinda Perathoner
%A Gabriele Centi
%J ´ß»¯Ñ§±¨
%P 869-876
%D 2014
%R 10.1016/S1872-2067(14)60098-X
%X £¿TheinvestigationbySEM/TEM,porosity,andX-raydiffractionmeasurementsofthegraphitizationprocessstartingfromamorphouscarbonnanospheres,preparedbyglucosecarbonization,isreported.Aspectsstudiedaretheannealingtemperatureinthe750-1000¡ærange,thetypeofinertcarriergas,andtimeoftreatmentinthe2-6hrange.Itisinvestigatedhowtheseparametersinfluencethestructuralandmorphologicalcharacteristicsofthecarbonmaterialsobtainedaswellastheirnanostructure.Itisshownthatitispossibletomaintainaftergraphitizationtheround-shapedmacromorphology,ahighsurfaceareaandporosity,andespeciallyalargestructuraldisorderinthegraphiticlayersstacking,withthepresenceofrathersmallordereddomains.Thesearecharacteristicsinterestingforvariouscatalyticapplications.ThekeyinobtainingthesecharacteristicsisthethermaltreatmentinaflowofN2.ItwasdemonstratedthattheuseofHeratherthanN2doesnotallowobtainingthesameresults.Theeffectisattributedtothepresenceoftracesofoxygen,enoughtocreatethepresenceofoxygenfunctionalgroupsonthesurfacetemperatureshigherthan750¡æ,whengraphitizationoccurs.Theseoxygenfunctionalgroupsfavorthegraphitizationprocess.
%K Graphitization
%K Carbonnanospheres
%K Carbonstructuraldisorder
%U http://www.chxb.cn/CN/abstract/abstract21354.shtml