氮掺杂碳纳米点的制备及应用研究  

Study on preparation and application of N-doped carbon nanodots

作　　者：王安 包桂蓉[1,2] 王华 罗嘉 高鹏[1] 梁思皓 Wang An;Bao Guirong;Wang Hua;Luo Jia;Gao Peng;Liang Sihao(Faculty of Metallurgy and Energy Engineering,Kunming University of Science and Technology,Kunming 650093;State Key Laboratory of Complex Non-ferrous Metal Resource Utilization,Kunming 650093;Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Kunming650223)

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]省部共建复杂有色金属资源清洁利用国家重点实验室,昆明650093 [3]中国科学院西双版纳热带植物园,昆明650223

出　　处：《化工新型材料》2022年第8期207-212,共6页New Chemical Materials

基　　金：国家自然科学基金(51966008)。

摘　　要：以柠檬酸三钠为原料,尿素为掺杂剂,采用水热法合成了一种荧光量子产率为66.23%的氮掺杂碳纳米点。采用透射电镜、X射线衍射、红外光谱、X射线光电子能谱等手段对其物化性质进行分析;采用紫外吸收光谱、365nm紫外灯、荧光发射光谱进行光学性质分析。结果表明:氮掺杂碳纳米点颗粒分散且粒径均一,平均粒径2.43nm,晶面间距0.22nm;在365nm光源照射下,其溶液呈强蓝荧光,最大激发波长和发射波长分别为365nm和425nm。Fe对氮掺杂碳纳米点溶液的荧光有猝灭效应,在酸性环境中氮掺杂碳纳米点溶液的荧光也有猝灭。Using trisodium citrate as raw material and urea as dopant,nitrogen(N)-doped carbon dots with fluorescence quantum yield of 66.23%was synthesized by hydrothermal method.TEM,XRD,FI-TR,XPS were used to analyze the physical and chemical properties of N-doped carbon nanodots.Ultraviolet absorption spectroscopy,365 nm ultraviolet lamps,and fluorescence emission spectra were used to analyze their optical properties.The results showed that the prepared N-doped carbon nanodots were dispersed and uniformed in particle size,with average particle size of 2.43 nm and interplanar spacing of 0.22 nm.Under the irradiation of 365 nm light source,the N-doped carbon nanodots solution showed strong blue fluorescence,with the maximum excitation and emission wavelengths of 365 nm and 425 nm,respectively.Fehad quenching effect on the fluorescence of the N-doped carbon nanodots solution,and the fluorescence of the N-doped carbon nanodots solution can also be quenched in acidic environment.

关 键 词：柠檬酸 尿素 碳纳米点 Fe3+检测 酸碱性检测 

分 类 号：O613.71[理学—无机化学] T321[理学—化学]