葛花衍生的氮掺杂碳点的制备及其应用  

Preparation and applications of nitrogen-doped carbon dots derived from flos puerariae

作　　者：李虎 原长洲 LI Hu;YUAN Changzhou(School of Materials Science and Engineering,University of Jinan,Jinan 250022,China)

机构地区：[1]济南大学材料科学与工程学院,山东济南250022

出　　处：《中国粉体技术》2025年第2期91-104,共14页China Powder Science and Technology

基　　金：国家自然科学基金项目:编号:52171211。

摘　　要：【目的】研究制备葛花衍生的碳点在Fe^(3+)检测、隐形荧光墨水和逻辑门运算等方面的应用。【方法】采用水热合成法,利用葛花富含蛋白质和酚类物质的性质,以葛花为前驱体,制备氮掺杂的葛花碳点;通过多种表征手段,研究葛花碳点的结构性能、光学性能和稳定性,探讨葛花碳点的离子检测等应用。【结果】葛花碳点具有良好的分散性和光致发光能力,最佳激发波长为365nm,发射蓝色荧光,可以作隐形荧光墨水应用;葛花碳点表面拥有大量的官能团,可以利用静态猝灭的方式有效检测Fe^(3+),同时具备良好的抗干扰能力;利用抗坏血酸可以还原Fe^(3+)使得荧光恢复的原理,设计的葛花碳点-Fe^(3+)-抗坏血酸体系,可用于蕴涵式逻辑门运算。【结论】成功制备的生物质氮掺杂碳点,可用于Fe^(3+)检测、隐形荧光墨水和逻辑门运算等。Objective Excessive Fe^(3+)causes environmental degradation and a decline in human health.Therefore,developing a simple and sensitive method for Fe^(3+)detection is crucial.As a new material for fluorescence-based methods,carbon dots have attracted sig-nificant attention due to their high sensitivity,selectivity,and low cost.Flos puerariae,a legume,contains abundant hydroxyl and amino molecules,making it an ideal precursor for carbon dot preparation.Methods Flos puerariae carbon dots were synthesized via a hydrothermal method.The physicochemical properties and optical performance of these carbon dots were characterized in detail using transmission electron microscopy,X-ray diffraction,Fourier-transform infrared spectroscopy,X-ray photoelectron spectroscopy,ultraviolet-visible(UV-vis)spectrophotometry,and fluores-cence spectrophotometry.The morphology,particle size,crystal structure,elemental composition,surface functional groups,photoluminescence properties,and optical stability of these carbon dots were studied.Their application potential in metal ion detection,invisible fluorescent ink,and implication logic gates was systematically investigated.In addition,their fluorescence quenching and reversible recovery mechanisms were studied.Results and Discussion The flos puerariae carbon dots exhibited an uneven quasi-spherical shape,with a particle size ranging from 1 to 3 nm and an average diameter of 2.52 nm.X-ray diffraction analysis revealed high disorder in these carbon dots.Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy revealed that these carbon dots contained abun-dant carboxyl,hydroxyl,carbonyl,and amino groups,with elemental composition of 67.78%C,8.41%N,and 23.81%O.Flos puerariae carbon dots exhibited excellent photoluminescence properties and optical stability.The optimal excitation wave-length was 365 nm,and the optimal emission wavelength was 444 nm.The carbon dots maintained good fluorescence stability under long-term 365 nm UV irradiation,varying temperatures,high-ion conc

关 键 词：碳量子点 荧光材料 金属离子检测 荧光墨水 逻辑门 

分 类 号：O657.32[理学—分析化学] TB44[理学—化学]