二氧化硫监测的光纤传感方法研究

1期

2002,B87(1):127.

黎学明,等:二氧化硫监测的光纤传感方法研究55

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StudyontheFiberOpticSensingMethodforSulfur

DioxideinELIXue2minga,WANG2ab,CHENWei2minb

(a.InstituteofChemistry;b.TheKeyLaboratoryforOptoelectronic

University,Chongqing400044,China)

Receiveddate:2006208203

Abstract:Afiberopticsensingmethodformonitoringsulfurdioxide(SO2)inenvironmentispresented.WithblueLEDexcitationsourceandminiaturefiberopticspectrometer,theintensityofphotoluminescencepeakforn2typeporoussiliconstabilizedbyphotochemicalmethodinSO2gasismeasured.Byanalyzingthevariationofintensity,theconcentrationofSO2gascanbeobtained.Accordingtotheoriesofsemiconductorelectrochemistryandsolidstatespectroscopy,thebasicprincipleofn2typeporoussilicon′sformationanditsSO2sensingarediscussedrespectively.Thechemicalconstituteofstabilizedporoussiliconisstudiedbyinfraredspectroscopy,anditsSO2sensingperformanceisalsoevaluated.Itisshownthatthephotoluminescenceofstabilizedn2typeporoussiliconcanrapidlyandreversiblyquenchedbySO2gas,andthecorrespondingpeakinquenchingprocessisverystable.TheresultdemonstratesthefeasibilityofthefiberopticsensingmethodformonitoringSO2gasinenvironment.

Keywords:Sulfurdioxide;Poroussilicon;Photoluminescencequenching;Fiberopticsensor

LIXue2ming　wasbornin1967.Chongqing,ProfessorofPrecisionInstrumentsandMechanics,Ph.D.degree,mainlyfocusesonfiberopticsensingtechnology,materialchemistryandappliedelectrochemistry.