木质素基N,S-CQDs的制备及其在Fe^(3+)检测中的应用

Preparation of N,S-Doped Carbon Quantum Dots from Lignin for Fe^(3+)Detection

以木质素磺酸钠为碳源和硫源,低共熔溶剂(DES)为氮源和反应溶剂制备了一种氮、硫双掺杂的碳量子点(N,S-CQDs)。制备的N,S-CQDs的粒径分布均匀,平均粒径为4.95 nm,量子产率达到了35.7%,量子产率大幅提升。制备的N,S-CQDs对Fe^(3+)具有优异的敏感性,可用于Fe^(3+)的定量检测,检测限为0.25μmol·L^(-1),检测范围是0~200μmol·L^(-1)。

In this paper,nitrogen and sulfur co-doped carbon quantum dots(N,S-CQDs)were prepared by using sodium lignosulfonate as carbon source and sulfur source,eutectic solvent(DES)as nitrogen source and reaction solvent.The particle size distribution of the prepared N,S-CQDs is uniform,the average particle size is 4.95 nm,the quantum yield is 35.7%,the quantum yield is greatly improved.The prepared N,S-CQDs has excellent sensitivity for Fe^(3+),and can be used for the quantitative determination of Fe^(3+)with the detection limit of 0.25μmol·L^(-1) and the detection range of 0—200μmol·L^(-1).