葡萄糖酸碳量子点的合成及其光学性能的研究  

Synthesis of carbon quantum dots with gluconic acid and its optical properties

作　　者：程姣燕 余茜[1] 吴夏怡 黄振钟[1] 

机构地区：[1]江西师范大学化学化工学院,南昌330022

出　　处：《分析试验室》2018年第3期286-290,共5页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金项目(21564005)资助

摘　　要：以葡萄糖酸为碳源,采用微波法、热解法和水热溶液法合成了水溶性较好的蓝色荧光碳量子点。用透射电镜(TEM)观察其形貌,荧光光谱(FL)和紫外可见光谱(UV)探究其激发和发射光谱,用时间分辨光谱(TRF)测其荧光寿命值。微波和热解法制备的碳量子点粒径在2.5~7.5 nm之间,激发波长为360 nm,发射波长为450 nm,荧光发射依赖激发波长,有三个荧光寿命,表面状态不均一。水热法制备的碳量子点,粒径在3.0~8.5 nm之间,激发波长为350 nm,发射波长为430 nm,荧光发射不依赖激发波长,只有一个荧光寿命值,表面状态均一。水热法合成的碳量子点荧光量子产率高为6.01%,为进一步研究葡萄糖酸制备碳量子点提供参考。Using gluconic acid as carbon source,carbon quantum dots（CQDs） with blue fluorescence and better water solubility were synthesized through microwave method,pyrolysis method and hydrothermal treatment.Its morphology was observed by transmission electron microscopy（TEM）.The excitation and emission spectra were explored through fluorescence spectrum（FL） and UV-vis spectroscopy（UV）,and the fluorescence lifetime value was measured by time-resolved spectroscopy（TRF）.Under microwave-based pyrolysis conditions,the particle size of as-prepared CQDs was between 2.5 - 7.5 nm,with the excitation and emission wavelength of 360 nm and 450 nm.The fluorescence emission depended on the excitation wavelength.Three fluorescent life time was obtained,which suggested the surface state was not uniform.The size of CQDs prepared by hydrothermal treatment was between 3.0 - 8.5 nm.The excitation wavelength and emission wavelength were 350 nm and 430 nm.The fluorescence emission did not depend on the excitation wavelength.There was Only one fluorescence lifetime value was obtained,indicating uniform surface state.The highest quantum yield of CQDs was synthesized by hydrothermal treatment with gluconic acid of 6.01 %.This paper provides a reference for the further study on the production of carbon quantum dots by using gluconic acid.

关 键 词：葡萄糖酸 碳量子点 微波法 热解法 水热法 荧光 

分 类 号：O657.3[理学—分析化学]