摘要
采用谷胱甘肽作为硫源,钼酸钠作为钼源,利用反应釜高温水热法制备二硫化钼量子点(MoS2QDs),显微镜(AFM、TEM)、紫外仪及荧光分光光度计显示其为单层结构,粒径约为5.26 nm,可发出深蓝荧光,最大激发、发射波长分别位于310、410 nm处,MoS2QDs制备方法简单,所合成MoS2QDs具有优异的荧光性质。Fe3+对MoS2QDs具有明显的荧光淬灭作用,当Fe3+的浓度范围为1~500 nmol/L时,Fe3+浓度与MoS2QDs荧光强度之间线性相关性较好(线性方程为:y=1.2775+0.0028x,R2=0.9948),检测限约为34.3 nmol/L。以此作为理论基础,构建了一种新的Fe3+检测方法,检测方法简单、迅速,不产生环境有害物质,可用于自然水系中Fe3+的检测,为环境检测提供新的技术支持。
A facile hydrothermal approach was developed for the preparation of molybdenum disulfide quantum dot(MoS2 QDs)with glutathione as the sulfur source and sodium molybdate as the molybdenum source.AFM,TEM,fluorescent photometer and UV detector showed that MoS2 QDs was a monolayer structure with a particle size of about 5.26 nm,which could emit dark blue fluorescence,and the maximum excitation and emission wavelength were located at 310 nm and 410 nm,respectively.This is a simple method for the preparation of MoS2 QDs and the synthesized MoS2 QDs had excellent fluorescence properties.Fe3+Ions displayed obvious fluorescence quenching ability on the fluorescence of MoS2 QDs and the quenching content was linearly related to Fe3+concentrations(1~500 nmol/L).The linear regression equation was y=1.2775+0.0028x,the correlation coefficient R2=0.9948,and the detection limit was 34.3 nmol/L.Based on the fluorescence quenching of MoS2 QDs by Fe3+ions,a new method for Fe3+ions detection was constructed and implemented.The fabricated method was harmless,simple and quick,which can be used for the detection of Fe3+in the real environment water,providing a new technical support for environment analysis.
作者
王琦
许静静
张秀莉
李菁菁
徐凯
WANG Qi;XU Jing-jing;ZHANG Xiu-li;LI Jing-jing;XU Kai(School of Medical Imaging,Xuzhou Medical University,Xuzhou 221004,China;Department of Radiology,Affiliated Hospital of Xuzhou Medical University,Xuzhou 221002,China)
出处
《化学试剂》
CAS
北大核心
2020年第7期786-790,共5页
Chemical Reagents
基金
江苏省自然科学基金优秀青年项目(BK20170054)
江苏省“科教强卫”青年医学人才项目(QNRC2016776)
中国博士后基金资助项目(2016M601890、2017T100406)
江苏省第十四批“六大人才高峰”高层次人才项目(WSN-112)
2018年高层次卫生人才“六个一工程”拔尖人才科研项目(LGY2018083)
徐州市科技计划项目(KC18210)。
