Page 27 - 《华农农业大学学报》2020年第4期

第 ４ 期 孔祥宇 等:基于功能化 Au＠A g 纳米棒的表面增强拉曼光谱检测汞离子 ２ １

Detectin gmercur y ionsbasedonsurfaceenhancedRaman
s p ectrosco py offunctionalizedAu＠A gnanorod

１ , ２ ２ ２ １ , ２
KONGXian gy u , BAIXian g ru , WANGLihua , ZENGLin g wen
１．Colle g eo fFoodScience& Technol gyo f Huazhon gA g riculturalUniversit y ,
Wuhan４３００７０ , China ;
２．Instituteo fEnvironmentandSa f et y WuhanAcadem yo fA g riculturalSciences ,
,
Wuhan４３００７０ , China

(
Abstract A surfaceＧenhanced Ramans p ectrosco py SERS ) techni q uebased onfunctionalized
２＋
Au＠A gnanorods ( Au＠A gNRs ) wasestablishedtoq uantitativel ydetectH g ina q ueoussolutions．In
２＋
thep resenceofH g , itscoordinationwith２ , ５Ｇdimerca p toＧ１ , ３ , ４Ｇthiadiazole ( DMCT ) onthesurfaceof
Au＠A gNRscausedthea gg re g ationofSERSdetectionp robes , resultin g ina “ hots p ot ” effect , leadin g
－１
totheSERSsi g nalofDMCTincreasedat１３６０cm ．TheincreasedSERSsi g nalshowedag oodlinear
２＋
/
relationshi pwithH g intheconcentrationran g efrom０．１to１０ μ g L : Y＝１９５．４９３８４X ＋１６７６．２３６６３
２ ２＋
/
( R ＝０．９９１ ) ．Thedetectionlimitwasaslowas１７n g L , muchlowerthanthatofthe H g content
/
( １ μ g L ) indrinkin gwaters p ecifiedb yWorldHealthOr g anization ( WHO ) ．Theresultsofs p ikedrecovＧ
２＋
er y testcarriedoutintheactualwatersam p leshowedthatthes p ikedrecoveriesofH g werefrom
２＋
１００．１％to１０６．５％ , andtherelativestandarddeviationswerefrom１．２３％ to７．９９％．TheH g sensin g
,
detectiontechni q uewithaccurac yra p idit yandhi g hsensitivit ybasedonSERShasaneffectivea pp licaＧ
２＋
tionfor q uantitativel ydetectin gH g inrealwater．
２＋
Ke y words Au＠A gNRs ; H g detectionmethod ; coordination ; surfaceenhancedRamans p ectrosＧ
co py
( 责任编辑:陆文昌)