摘要
以太西无烟煤为原料,采用超声液相剥离法制备得到煤基石墨烯量子点(Coal based graphene quantum dots,C-GQDs),以3-巯基丙酸为硫源采用水热合成法成功制备了硫掺杂煤基石墨烯量子点(Sulfur doped coal-based graphene quantum dots,SC-GQDs),探讨了不同比例的硫源掺杂对产物荧光量子产率的影响。采用透射电子显微镜(TEM)、傅里叶变换红外光谱(FTIR)、紫外可见吸收光谱(UV-vis)及荧光光谱(PL)对所制备的S-C-GQDs形貌结构及其光学性质进行表征和测定。结果表明:S-CGQDs大小均一,分布均匀,粒径分布12~16 nm;当C-GQDs和硫源的质量比例为1︰30时,S-C-GQDs的量子产率可达46%。硫掺杂极大改变了产物的电子活性和化学性质,使S-C-GQDs对Ag+检测具有较高的选择性。
In this paper,coal-based graphene quantum dots(GQDs)were prepared from Taixi anthracite by ultrasonic liquid phase stripping method.Sulfur-doped coal-based graphene quantumdots(S-C-GQDs)were successfully prepared by hydrothermal synthesis using 3-mercaptopropionic acid as sulfur source.The effects of different proportion of sulfur source doping on the fluorescence quantum yield of the products were discussed.The morphology,structure and optical properties of S-C-GQDs were characterized and measured by transmission electron microscopy(TEM),Fourier transform infrared spectroscopy(FTIR),ultraviolet-visible absorption spectroscopy(UV-vis)and fluorescence spectroscopy(PL).The results show that the size and distribution of S-C-GQDs are uniform,and the particle size distribution is 12~16 nm.When the mass ratio of C-GQDs to sulphur source is 1︰30,the quantum yield of SC-GQDs can reach 46%.Sulfur doping greatly changes the electronic activity and chemical properties of the products,making S-CGQDs highly selective to Ag+.
作者
张亚婷
韩静静
张凯博
张婧
李可可
贾凯丽
徐安南
Zhang Ya-ting;Han Jing-jing;Zhang Kai-bo;Zhang Jing;Li Ke-ke;Jia Kai-li;Xu An-nan(School of Chemistry and Chemical Engineering Xi’an University of Science and Technology,Shaanxi Xi’an 710054,China;Key Laboratory of Coal Resources Exploration and Comprehensive Utilization,Ministry of Land and Resources,Shaanxi Xi’an 710021,China)
出处
《炭素技术》
CAS
北大核心
2019年第5期39-42,共4页
Carbon Techniques
基金
国家自然科学基金(U1703251,U1810113)
陕西省重点研发计划(2017ZDCXL-GY-10-01-02)
国土资源部煤炭资源勘查与综合利用重点实验室开放研究课题项目(KF2016-4).
关键词
石墨烯量子点
硫掺杂
量子产率
Graphene quantum dots(GQDs)
sulfur doping
quantum dots yield
