文献类型：期刊文献

中文题名：离子印迹改性木质素/石墨烯复合量子点的制备及性能

英文题名：Preparation and properties of ion imprinted modified lignin/graphene composite quantum dots

作者：赵瑀杨[1,2] 赵东洋[2] 姚娜[1] 丁海阳[1] 李梅[1] 李守海[1] 许利娜[1]

第一作者：赵瑀杨

机构：[1]中国林业科学研究院林产化学工业研究所,江苏省生物质能源与材料重点实验室,国家林业和草原局林产化学工程重点实验室,林木生物质低碳高效利用国家工程研究中心,江苏省林业资源高效加工利用协同创新中心,江苏南京210042;[2]辽宁工程技术大学环境科学与工程学院,辽宁阜新123000

年份：2025

卷号：39

期号：6

起止页码：1090-1099

中文期刊名：高校化学工程学报

外文期刊名：Journal of Chemical Engineering of Chinese Universities

收录：;北大核心:【北大核心2023】；

基金：中国林业科学研究院中央级公益性科研院所基本科研业务费专项资助(CAFYBB2021QB005);国家自然科学基金(32001284)。

语种：中文

中文关键词：离子印迹;木质素磺酸钠;石墨烯复合量子点;Co^(2+);荧光探针

外文关键词：ion imprinting;lignin sulfonate;graphene quantum dots;Co^(2+);fluorescenceprobe

分类号：TQ35

摘要：木质素作为具有巨大应用前景的生物质资源,提高木质素的利用率和挖掘木质素的潜在价值持续吸引着业界的关注与探索。传统木质素修饰的荧光碳点检测金属离子,检测结果具有“不可预测性”,这一特性对此类碳量子点的开发与应用造成一定程度的限制。离子印迹技术凭借其特异性离子识别机制,可使碳点“专一性”和“特异性”识别金属离子功能得到加强,为碳点检测金属离子领域提供新的研究思路。文中首先进行木质素的胺化改性,随后采用柠檬酸热解法制备出以Co^(2+)为模板离子的离子印迹改性木质素/石墨烯复合量子点(IIT/GQDs)。利用荧光光谱仪测得IIT/GQDs的最大激发波长和发射波长分别为318 nm和425 nm,利用透射电镜测得复合量子点的粒径平均分布在0.5~5 nm且呈准零维球形,以乙二胺四乙酸(EDTA)洗脱Co^(2+)后,可作为检测Co^(2+)的荧光探针,在10~500μmol·L^(-1)内,荧光强度(F0/F)与Co^(2+)浓度呈线性关系,Stern-volmer线性回归方程可以表示为F0/F=1.06+(3.18×10^(-4))C(Co^(2+)),相关性系数R2为0.98。此外,IIT/GQDs可以用于实际水样中的Co^(2+)检测,研究结论为碳点在环境监测领域提供了新的思路。
As a biomass resource with great application prospects,lignin has continuously attracted the attention and exploration of the industry in terms of improving its utilization rate and exploring its potential value.In the traditional fluorescence carbon dots modified by lignin for detecting metal ions,the detection results are"unpredictable",which restricts the development and application of such carbon dots to a certain extent.Ion-imprinted technology,by virtue of its specific ion-recognition mechanism,can strengthen the"specificity"and"selectivity"of carbon dots in recognizing metal ions,providing new research ideas for the field of carbon dots detecting metal ions.In this study,the amination modification of lignin was carried out first,and then the ion-imprinted modified lignin/graphene composite quantum dots(IIT/GQDs)with Co^(2+)as the template ion were prepared by citric acid pyrolysis method.The maximum excitation wavelength and emission wavelength of IIT/GQDs were measured as 318 nm and 425 nm respectively by a fluorescence spectrometer.The average particle size of the composite quantum dots,which was measured by a transmission electron microscope,was distributed in the range of 0.5-5 nm and was in a quasi-zero-dimensional spherical shape.After eluting Co^(2+)with EDTA,it can be used as a fluorescence probe for detecting Co^(2+).In the range of 10-500μmol·L^(-1),the fluorescence intensity(F0/F)has a linear relationship with the concentration of Co^(2+),and the Stern-Volmer linear regression equation can be expressed as F0/F=1.06+(3.18×10^(-4))C(Co^(2+)),with the correlation coefficient R2 being 0.98.In addition,IIT/GQDs can be used for Co^(2+)detection in actual water samples.This research method provides new ideas for carbon dots in the field of environmental monitoring.