Ce_xCo_(1-x)O_y:Eu^(3+)纳米线可控制备及其荧光猝灭研究

Controllable synthesis of Ce_xCo_(1-x)O_y:Eu^(3+)nanowire and study of fluorescence quenching

采用负压抽滤法,在多孔纳米氧化铝模板(AAO)中制备CexCo1-xOy:Eu3+纳米线阵列.以SEM、TEM、XRD和EDS,对CexCo1-xOy:Eu3+纳米线阵列形貌、结构和元素组成进行表征,用PerkinElmer LS-55型荧光光谱仪对CexCo1-xOy:Eu3+纳米线荧光强度进行检测.结果表明:CexCo1-xOy:Eu3+纳米线为非晶态结构,纳米线尺寸均一、形貌可控.向CexOy:Eu3+纳米线掺杂Co3+时,随着Co3+摩尔百分比增大,CexCo1-xOy:Eu3+纳米线荧光发射强度逐渐减弱,当Co3+掺杂浓度达到15%时,导致CexCo1-xOy:Eu3+纳米线荧光猝灭,此可为医疗传感材料及器件设计提供技术支撑.

CexCo1-xxOy：Eu3＋ nanowire arrays had been fabricated in anodic aluminum oxide （AAO） templates by subatmospheric pressure suction filtration. The SEM, TEM, XRD, and EDS were employed to characterize the morphology structure and the element content of CexCo1-xxOy：Eu3＋ nanowire arrays and the fluorescence properties of CexCo1-xxOy：Eu3＋ nanowire arrays were detected by Fluorescence Spectrophotometer （PerkinElmer LS-55）. The results indicated that the CexCo1- xOy：Eu3＋ nanowire arrays are amorphous and the morphology structure is uniform. When the Cec Oy ： Eu3＋ was doped with Co3＋ , and as the Co3＋molar percentage increases, the fluorescence intensity was gradually decreased. When the doped Co3＋ molar percentage increases to 15%, the fluorescence of CexCo1-xxOy：Eu3＋ nanowire arrays was quenched, which is supportable for medical sensor and design nano devices.