摘要
对氧化石墨烯纳米材料进行HNO_(3)氧化处理,制备了水溶性好且具有强电化学发光(ECL)活性的大尺寸石墨烯量子点组装体(Large-sized graphene quantum dot assemblies,LSGQD-NAs).利用透射电子显微镜(TEM)、原子力显微镜(AFM)、傅里叶变换红外光谱(FTIR)和拉曼光谱(Raman)等方法对其进行了表征,结果表明,石墨烯量子点组装体的平均高度为20 nm,且富含大量的羟基和羧基.电化学测试结果显示,在共反应物K_(2)S_(2)O_(8)存在下,LSGQD-NAs在阴极产生很强的ECL(峰值约在685 nm);并推测了其ECL反应机理,发现LSGQD-NAs容易通过中心未氧化的石墨烯π-π作用于GC电极表面进行组装修饰.本研究为基于石墨烯量子点ECL传感器的研究提供了新方法.
A dispersible large-sized graphene quantum dots assemblies(LSGQD-NAs)in aqueous solution with strong electrochemiluminescence activity was fabricated from graphene oxide by nitric acid etching.LSGQD-NAs were characterized by transmission electron microscopy(TEM),atomic force microscopy(AFM),Fourier transform infrared spectroscopy(FTIR)and Raman spectroscopy(Raman),etc.The results demonstrated that the large-sized graphene quantum dots had an average height of 20 nm and contained abundant carboxyl and hydroxyl groups.Strong ECL was studied in detail with the coreaction of K_(2)S_(2)O_(8) and the maximum emission wavelength at 685 nm.It is found that LSGQD-NAs can be easily assembled and modified on the surface of GC electrode through theπ⁃πbond action of unoxidized graphene.This study provides a new method for the research of ECL sensor based on graphene quantum dots.
作者
王瑞娜
孙瑞粉
钟添华
池毓务
WANG Ruina;SUN Ruifen;ZHONG Tianhua;CHI Yuwu(Departmeat of Pharmacy,Quanzhou Medical College,Quanzhou 362011,China;College of Chemistry,Fuzhou University,Fuzhou 350108,China;Key Laboratory of Marine Biogenetic Resources,Third Institute of Oceanography,Ministry of Natural Resources,Xiamen 361005,China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2022年第8期174-182,共9页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:22074018)
泉州市科技计划项目(批准号:2019N072S,2021N129S)资助。
关键词
大尺寸石墨烯量子点组装体
电化学发光
氧化石墨烯
石墨烯量子点
Large-sized graphene quantum dot assemblies(LSGQD-NAs)
Electrogenerated chemiluminescence(ECL)
Grapheneoxide(GO),Graphene quantum dots