氮自掺杂碳量子点的制备及对Fe^(3+)的检测  

Preparation of Nitrogen Self-doped Carbon Quantum Dots and Detection of Fe^(3+)

作　　者：李浩哲 刘德鸿 杨丹 冉诗兰 张星 郝艳玲 LI Hao-zhe;LIU De-hong;YANG Dan;RAN Shi-lan;ZHANG Xing;HAO Yan-ling(College of Physics and Engineering Technology,Minzu Normal University of Xingyi,Xingyi 562400,China;Key Laboratory for Micro-nano Functional Materials of Qianxinan,Xingyi 562400,China)

机构地区：[1]兴义民族师范学院物理与工程技术学院,兴义562400 [2]黔西南州微纳功能材料重点实验室,兴义562400

出　　处：《价值工程》2024年第29期95-98,共4页Value Engineering

基　　金：大学生创新创业训练项目(项目编号:202210666442);兴义民族师范学院教授科研基金资助项目(项目编号:19XYJS05);兴义民族师范学院科学研究基金州管专家专项项目(项目编号:21XYZJ05);贵州省教育厅拔尖人才项目(黔科教[2022]094)。

摘　　要：以富含氨基酸的薏仁米为原料,通过水热法合成了氮自掺杂绿色荧光碳量子点(N-CQDs)。通过TEM、FTIR、XPS、PL和UV-Vis对N-CQDs的形貌、表面结构及光学性质进行了表征分析,并将其应用于离子检测。结果表明,N-CQDs存在明显的晶格条纹,表面含有羟基、羧基、氨基等官能团,在水中有良好的溶解性;Fe^(3+)对N-CQDs的荧光有明显的猝灭作用,在100-200μmol/L的浓度范围内,Fe^(3+)浓度与N-CQDs的荧光强度成线性关系,表明N-CQDs在一定范围内能作为荧光探针检测水溶液中微量的Fe^(3+),检出限为10μmol/L,该研究为制备自掺杂碳量子点提供了参考,为新型荧光碳点的实际应用提供了有益借鉴。Nitrogen self-doped green fluorescent carbon quantum dots(N-CQDs)were synthesized by hydrothermal method from Coix seed,which is rich in amino acids.The morphology,surface structure and optical properties of N-CQDs were characterized by TEM FTIR,XPS,PL and UV-Vis,and then applied to ion detection.The results show that N-CQDs has obvious lattice fringes,containing hydroxyl,carboxyl,amino and other functional groups on the surface,and has good solubility in water.Fe^(3+)has a significant quenching effect on the fluorescence of N-CQDs.In the concentration range of 100-200μmol/L,the concentration of Fe^(3+)is linear with the fluorescence intensity of N-CQDs,indicating that N-CQDs can be used as a fluorescence probe to detect trace Fe^(3+)in aqueous solution in a certain range,and the detection limit is 10μmol/L.This study provides a reference for the preparation of self-doped carbon quantum dots and provides a useful reference for the practical application of new fluorescent carbon dots.

关 键 词：薏仁米 水热法 自掺杂碳量子点 荧光探针 

分 类 号：TB383[一般工业技术—材料科学与工程]