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1、Solid-StateElectronics50(2006)1728–1731www.elsevier.com/locate/sseLow-temperaturecarbonmonoxidegassensorsbasedgold/tindioxideShurongWang,YingqiangZhao,JingHuang,YanWang,ShihuaWu*,ShouminZhang,WeipingHuangDepartmentofChemistry,NankaiUniversity,Tianjin300071,ChinaReceived13March2006
2、;receivedinrevisedform3September2006;accepted3October2006ThereviewofthispaperwasarrangedbyProf.Y.ArakawaAbstractTindioxidenanocrystalsweresynthesizedbyaprecipitationprocessandthenusedasthesupportfor2wt.%gold/tindioxideprep-arationviaadeposition–precipitationmethod,followedbycalcin
3、ationat200°C.Thickfilmswerefabricatedfromgold/tindioxidepow-ders,andthesensingbehaviorforcarbonmonoxidegaswasinvestigated.Thegold/tindioxidewasfoundtobeefficientcarbonmonoxidegas-sensingmaterialsunderlowoperatingtemperature(83–210°C).TheAu/SnO2sensorwithSnO2calcinedat300°Cexhibitedbe
4、tterCOgas-sensingbehaviorthantheSnO2calcinedatothertemperatures.TheexperimentalresultsindicatedthepotentialuseofAudopedSnO2forCOgassensing.Ó2006ElsevierLtd.Allrightsreserved.Keywords:Low-temperaturecarbonmonoxidesensors;Gold/tindioxide;Deposition–precipitationmethod1.Introductiont
5、ypesofCOgassensorswithlow-powerconsumption.Sev-eralmetalshavebeenusedassensitizingadditivesinorderCarbonmonoxideisoneofthemostcommonandtoenhancetheCOsensitivity.Palladium(Pd),silver(Ag),dangerouspollutantspresentintheenvironmentduetoplatinum(Pt)andgold(Au)arethemostcommonmetalemis
6、sionsfromautomatedvehicles,aircraft,naturalgasadditivesthatareusedtoimprovethegas-sensingproper-emission,industrialwastage,sewageleaking,mines,etc.tiesofthesemiconductorgassensors[4,5].However,thereItspoisonouseffectsonhumanlifearewell-known.There-isstillaprimarychallengeinattempti
7、ngtomeettheneedsfore,aCOgassensorisneededtopreventCOpoisoninginoflow-powerconsumptionandhighsensitivityofCOgashomesorfactories,andithasattractedagreatdealofsensormeanwhile.ThedopeofAumightbeapromisingattention.Low-powerconsumptionisanimportantfeaturemethodindecreasingtheoperatingt
8、emperatureofCOforthesensoroperati
