PDF
摘要
为了提高碳量子点(CQDs)荧光探针在荧光检测中的重复利用率,采用微波法制备了氮掺杂碳量子点(N-CQDs),并将其固载于棉纤维表面,得到N-CQDs/棉纤维复合材料,用于对偶氮染料铬黑T(EBT)的荧光检测。该复合材料的结构和性能采用傅里叶变换红外光谱、X射线光电子能谱、扫描电子显微镜和能谱仪、稳态瞬态荧光光谱等进行了测试和表征。结果表明,N-CQDs呈球形,平均直径为5nm,并且均匀接枝于棉纤维表面。所制备复合材料的发射荧光具有激发光波长依赖性,激发光为290nm时,最强发射荧光的波长为540nm。荧光检测结果显示,所制备复合材料的荧光猝灭与EBT溶液在浓度范围0～50μmol/L呈线性相关;而且该荧光探针的灵敏度高,可重复利用。因此,所制备的N-CQDs/棉纤维复合荧光探针简单、灵敏、可重复利用,在染料废水的检测中具有巨大的应用潜力。
Abstract
In order to achieve the reusability of carbon quantum dot(CQDs) fluorescent probes in fluorescence detection,nitrogen-doped carbon quantum dots (N-CQDs) were prepared by microwave method and immobilized on the surface of cotton fibers to obtain N-CQDs/cotton fiber composite for fluorescence detection of azo dye chromium black T (EBT).The structure and properties of the N-CQDs/cotton composite were tested and characterized using Fourier transform infrared spectroscopy (FT-IR),X-ray photoelectron spectroscopy (XPS),scanning electron microscopy and energy dispersive spectroscopy (SEM&EDS),and steady-state transient fluorescence spectroscopy (FLS).The results showed that N-CQDs were spherical,with an average diameter of 5nm,and were uniformly grafted onto the surface of cotton fibers.The emission fluorescence of the prepared composite was wavelength dependent on the excitation light.When the excitation light was 290nm,the strongest emission fluorescence wavelength was 540nm.The fluorescence quenching of the prepared N-CQDs/cotton composite material showed a good linear correlation with the concentration of EBT solution in the range of 0～50μmol/L.Moreover,this fluorescent probe exhibited high sensitivity and reusability.Therefore,the N-CQDs/cotton fiber composite fluorescent probe prepared in this study is simple,sensitive,and reusable,demonstrating great potential for application in the detection of dye wastewater.
关键词
碳量子点
/
微波法
/
棉纤维
/
铬黑T
/
荧光探针
Key words
carbon quantum dots
/
microwave method
/
cotton fiber
/
chromium black T
/
fluorescent probe
氮掺杂碳量子点/棉纤维复合材料制备及其荧光检测研究[J].
化工新型材料, 2025, 53(12): 269-274 DOI:10.19817/j.cnki.issn1006-3536.2025.12.020
[1] 杨秀培,罗娜.碳量子点的合成与应用进展[J].西华师范大学学报(自然科学版),2016,37(3):243-248.
[2] 杜勤.暖白光LED用高荧光量子产率长波长碳量子点的制备[D].太原:太原理工大学,2018.
[3] 鲍巧臻.掺杂碳量子点的制备及其荧光传感应用研究[D].福州:福建医科大学,2021.
[4] 吕波,嵇聪,李光磊,等.氮硼共掺杂碳量子点的制备及其对六价铬的检测[J].食品安全质量检测学报,2023,14(3):260-268.
[5] 郝丽娟,王婷,董国华,等.基于玉米淀粉制备绿色碳量子点及氢离子/氢氧根离子调节荧光开关性能[J].应用化学,2021,38(2):202-211.
[6] 陈琼阳.新型碳量子点结构及纳米转角石墨烯结构的碳材料[D].杭州:浙江大学,2018.
[7] 许佳聪.基于碳量子点/聚乙烯咔唑掺杂发光层的高亮度多色电致发光器件[D].太原:太原理工大学,2019.
[8] 黄长友.碳量子点修饰半导体复合材料的制备及可见光下处理偶氮染料废水的研究[D].镇江:江苏大学,2017.
[9] 郭玉梅.偶氮染料的生物毒性及其与生物大分子的结合作用[D].济南:山东大学,2011.
[10] 巴桑.偶氮染料与化合物的颜色及危害[J].西藏科技,2015(1):38-39.
[11] Zhou J,Du E,He Y,et al.Preparation of carbonized Kapok fiber/reduced graphene oxide aerogel for oil-water separation[J].Chemical Engineering & Technology,2020,43(12):2418-2427.
[12] Molaei M.Gadolinium-doped fluorescent carbon quantum dots as MRI contrast agents and fluorescent probes[J].Scientific Reports,2022,12(1):17681.
[13] Pan J,Zhang X,Zhao C,et al.The flexible-transparent photosensitive films of cotton cellulose framework of carbon quantum dots/ZnO[J].Materials Letters,2018,211:289-292.
[14] Wang S,Gao Y.Fabrication of cotton fiber-derived self-adherent formed porous-carbon materials[J].Journal of Natural Fibers,2022,19(7):2607-2618.
[15] Hua J,Yang J,Zhu Y,et al.Highly fluorescent carbon quantum dots as nanoprobes for sensitive and selective determination of mercury(Ⅱ) in surface waters[J].Spectrochimica Acta Part A:Molecular and Biomolecular Spectroscopy,2017,187:149-155.
[16] 张现峰,芦静波,王学梅.温敏性碳量子点的快速制备、荧光性质及细胞成像应用[J].分析测试学报,2018,37(2):198-203.
[17] 陆婷婷.基于荧光碳量子点的适配体传感器构建与农残检测研究[D].贵阳:贵州大学,2020.
[18] 彭雪.碳量子点制备及其在荧光材料和离子检测中的应用[D].青岛:青岛科技大学,2017.
[19] Bharathi D,Krishna R,Siddlingeshwar B,et al.Understanding the interaction of carbon quantum dots with CuO and Cu2O by fluorescence quenching[J].Journal of Hazardous Materials,2019,369:17-24.
[20] Zou W,Ma X,Zheng P.Preparation and functional study of cellulose/carbon quantum dot composites[J].Cellulose,2020,27(4):2099-2113.
基金资助
辽宁省自然科学基金项目(20180550053);大连产品质量检验检测研究院有限公司科研项目(2022-FX-001)
