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1、哈尔滨工业大学工程硕士学位论文ABSTRACTUsingZnOmetalsemiconductormaterialsinthegassensorisalwaystheresearchhotspot,duetothesensormadefromzincoxidehasmanyadvantagessuchaslowcost,goodselectivity,fastrespondingspeedandhighsensitivity,anditcanbewidelyemployedindetectionoftoxicandinflammablegasesandmet
2、eringofatmosphericgases.Inthisthesis,Zn(NO3)2andC6H12N4wereusedastherawmaterials,usingthehydrothermalmethodbycontrollingthegrowthsubstrate,reactingtemperature，pHofthereactingsolutionandaddingdifferentamountofglycoltosynthesizeZnO.Therod-like,bamboo-like,flower-likeandreticular-like
3、ZnOhadbeensuccessfullyfabricatedatdifferentconditions,amongthemthereticular-likeandflower-likeZnOthatsynthesizedonthetwosidesofthealuminumplateshavebeenfabricatedatthefirsttime,andit’salsoprovedtherepeatability.Andtheproductswereanalyzedbyscanningelectronmicroscope,X-RayDiffraction
4、,photoluminescenceandsoon,thegrowthmechanismofthedifferentmorphologiesthatsynthesizedatdifferentconditionswerealsodiscussed.IthasimprovedinthethesisthatthemorphologyofTiO2substratehaslittleeffectonthemorphologyofZnO,butthemorphologyofZnOgrowsmuchmoreuniformlywiththesubstrate.ThepHa
5、lsoplaysanimportantroleinthemorphologyofZnO,totaldifferentmorphologieswouldbefabricatedunderdifferentpH.WhenthepH=14,amorphologywithlargespecificsurfaceareacanbefabricated.Thechangingreactingtemperaturedoesn’tchangethemorphologiesoftheZnOthinfilmwhichwasassembledbyZnOmicrorodsthats
6、ynthesizedonthesubstrate,butonlychangethemorphologiesthatgrewontheZnOthinfilm.Theadditionofglycolmadetheflake-likestructureswithhighsurfacetovolumeratiomucheasiertobegot.Andwhentheadditionofglycolis10ml,theflakereachesthenanometerlevel.DependonallfactorsthatcaninfluencetheZnOmorpho
7、logyinthisthesis,theconditionsweremodifiedtousealuminumasthegrowingsubstrate,added10mlglycolandmadethepHofreactingsolutionto14byaddingNaOHparticlesintothesolution,afterthehydrothermalreaction,areticular-likeandflower-likeZnOstructurehasfabricatedsuccessfully.Keywords:zincoxide,subs
8、trate,glycol,pH,temperatur
