碱木质素碳点的制备及对Fe^(3+)检测性能研究  

Preparation of Alkali Lignin Carbon Dots and Study on Fe^(3+) Detection Performance

作　　者：任世明 郑祖阳 韩春晖 李瑶瑶 庄建东[1,2] REN Shiming;ZHENG Zuyang;HAN Chunhui;LI Yaoyao;ZHUANG Jiandong(College of Material Engineering,Fujian Agriculture and Forestry University,Fuzhou,Fujian Province,350002;National Forestry and Grassland Administration Key Lab of Plant Fiber Functional Materials,Fuzhou,Fujian Province,350002;Department of Forensic Sciences,Fujian Police College,Fuzhou,Fujian Province,350007)

机构地区：[1]福建农林大学材料工程学院,福建福州350002 [2]植物纤维功能材料国家林业和草原局重点实验室,福建福州350002 [3]福建警察学院刑事科学技术系,福建福州350007

出　　处：《中国造纸》2022年第4期38-46,共9页China Pulp & Paper

基　　金：福建省自然科学基金面上项目(2021J01101);福建省高等学校新世纪优秀人才支持计划项目(NCETFJ);福建农林大学科技创新专项基金(CXZX2019114S)。

摘　　要：以碱木质素(Alkalilignin,AL)为碳源、乙二胺(Ethanediamine,EDA)为钝化剂、双氧水(H_(2)O_(2))为氧化剂,利用简单、绿色、高效的水热法制备碱木质素碳点(ALE-CDs)。以荧光性能为指标,通过单因素实验优选出ALE-CDs的最佳制备工艺。结果表明,ALE-CDs表面存在大量的羟基(—OH)、羧基(—COOH)和氨基(—NH_(2))等官能团,在水中具有优良的分散性和稳定性,荧光量子产率及寿命分别为19.20%和6.03 ns。利用ALE-CDs为荧光探针检测不同金属离子,发现ALE-CDs对Fe^(3+)表现出较好的选择性,荧光强度与Fe^(3+)浓度(0~50μmol/L)呈良好的线性关系,Fe^(3+)检出限约为1.66μmol/L。Lignin-based carbon dots(ALE-CDs)were synthesized via a simple,green and efficient hydrothermal method,using alkali lignin(AL)as carbon source,ethylenediamine(EDA)as passivator and hydrogen peroxide(H_(2)O_(2))as oxidant.The optimal preparation process of ALE-CDs was optimized by single factor experiment using fluorescence performance as the index.It was found that the ALE-CDs were rich in functional groups on surface,such as hydroxyl(—OH),carboxyl(—COOH)and amino(—NH_(2)),and showed excellent dispersion and stability in water.The fluorescence quantum yield and lifetime were 19.20%and 6.03 ns,respectively.Using ALE-CDs as fluorescent probes to detect different metal ions,it was found that ALE-CDs showed good selectivity for Fe^(3+),and the fluorescence intensity had a good linear relationship with the Fe^(3+)concentration(0~50μmol/L),and the detection limit of Fe^(3+)could reach 1.66μmol/L.

关 键 词：碱木质素 乙二胺 碳点 荧光猝灭 Fe^(3+)离子检测 

分 类 号：TS79[轻工技术与工程—制浆造纸工程]