氮、硫掺杂碳量子点的合成及光电性能的研究  

Synthesis of carbon and photoelectric properties of nitrogen and sulfur doped carbon quantum dots

作　　者：胡月芳[1] 曾杲 欧世依 刘国华 李洁新 HU Yue-fang;ZENG Gao;OU Shi-yi;LIU Guo-hua;LI Jie-xin(Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization,College of Materials and Chemical Engineering Hezhou University,Hezhou 542899,China)

机构地区：[1]广西碳酸钙资源综合利用重点实验室,材料与化学工程学院,贺州学院,广西贺州542899

出　　处：《化学研究与应用》2022年第8期1828-1838,共11页Chemical Research and Application

基　　金：广西自然科学基金面上项目(2022GXNSFAA035469、2017GXNSFAA198274);贺州学院博士科研启动基金项目(HZUBS202105);广西壮族自治区大学生创新训练计划项目(202111838032)资助。

摘　　要：本文以柠檬酸钠和L-半胱氨酸为原料,在最佳合成时间为8 h、最佳合成温度为190℃、最佳合成原料比(柠檬酸钠∶L-半胱氨酸比为0.8 g∶0.8 g)条件下,用一步水热法制备氮、硫掺杂碳量子点(N,S-CQDs),并用场发射透射电镜(TEM)、X射线光电子能谱(XPS)、傅立叶转换红外光谱(FT-IR)等技术对N,S-CQDs的形貌和结构进行表征,利用紫外可见光谱(UV-Vis)和荧光光谱考察N,S-CQDs的荧光性能;利用电化学分析仪研究N,S-CQDs的电化学性能。结果表明,与CQDs相比,N,S-CQDs粒径较小,分散性良好,最大发射波长较长,其表面官能团更加丰富,荧光量子产率较高(33.5%),表现出更优异荧光性能和电化学性能。Sodium citrate and L-cysteine were used as the raw material,under the optimal synthesis time of 8 h,the optimal synthesis temperature of 190℃,and the optimal synthetic raw material ratio(sodium citrate∶L-cysteine ratio of 0.8 g∶0.8 g),nitrogen and sulfur-doped carbon quantum dots(N,S-CQDs)were prepared by the one-step hydrothermal method.In addition,the morphology and structure of the N,S-CQDs were characterized by the field emission transmission radio mirror(TEM),X-ray optoelectronic energy spectroscopy(XPS),Fourier conversion infrared spectrum(FT-IR)and other technologies,and the fluorescence properties of N,S-CQDs were investigated by UV-VIS and fluorescence spectra;The electrochemical properties of the N,S-CQDs was studied by the electrochemical analyser.The results show that N,S-CQDs have small particle size,good dispersion,longer maximum emission wavelength,richer surface functional groups,higher fluorescence quantum yield(33.5%),and perform better fluorescence and electrochemical properties.

关 键 词：氮、硫掺杂碳量子点 水热法 荧光性能 电化学性能 

分 类 号：O657.3[理学—分析化学]