没食子酸介导合成的还原型氧化石墨烯对荧光官能团的选择性识别  

Gallic acid-mediated synthesis of reduced graphene oxide for selective recognition of fluorescent functional groups

作　　者：刘忠德[1,2] 刘春芳[3] 杨慧[3] 王健[1,2] 王燚[3] 黄承志[1,2,3] 

机构地区：[1]发光与实时分析教育部重点实验室 [2]西南大学药学院,重庆400715 [3]西南大学化学化工学院,重庆400715

出　　处：《中国科学：化学》2014年第3期358-365,共8页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(21035005);2013年重庆高校创新团队建设计划项目

摘　　要：本文以氧化石墨烯为前体,没食子酸为还原剂和稳定剂,通过简单的水浴加热法一步合成了还原型氧化石墨烯.利用紫外可见吸收光谱、傅里叶红外光谱、拉曼光谱、X-射线衍射及扫描电子显微镜对产物进行了一系列分析表征.结果表明,没食子酸可将氧化石墨烯还原为石墨烯.此外,还考察了制备的还原型氧化石墨烯对阴阳离子荧光官能团荧光强度的影响.结果表明,没食子酸介导合成的还原型氧化石墨烯能有效猝灭罗丹明等阳离子官能团的荧光,而增强荧光素类阴离子官能团的荧光,因此可以选择性地识别荧光官能团.In this work, graphene oxide was used as the precursor, and gallic acid （GA） was used as the reducing agent and stabilizer to obtain the reduced graphene oxide by water bath heating method. Ultraviolet visible absorption spectrum, Fourier transform infrared spectrum, Raman spectroscopy, X-ray diffraction and scanning electron microscopy were carried out to characterize the resulting product. The results showed that GA can be used to prepare graphene from graphene oxide. Moreover, the influence of reduced graphene oxide on the fluorescence of anionic dye and cationic dye was investigated. The results revealed that the reduced graphene oxide can effectively quench the fluorescence of cationic dyes and cause enhancement of fluorescence of the fluorescein anionic dyes.

关 键 词：石墨烯 化学还原 荧光猝灭 荧光增强 

分 类 号：TQ127.11[化学工程—无机化工]