发光学报2016，Vol.37Issue(4)：410-415,6.DOI:10.3788/fgxb20163704.0410
一步合成硫、氮共掺杂的碳量子点及其在Fe3+检测中的应用
One-step Synthesis of Sulfur-and Nitrogen-co-doped Carbon Quantum Dots for Fe(Ⅲ) Detection
摘要
Abstract
Not only do the photoluminescence ( PL) properties of carbon quantum dots ( CQDs) de-pend on their sizes, but also rely on their surface states. Accordingly, the PL behaviors of CQDs could be tuned by doping and/or grafting heteroatoms and groups. In this work, sulfur-and nitrogen-co-doped carbon quantum dots ( SN-CQDs) were firstly synthesized by one-step hydrothermal meth-od using p-aminobenzenesulfonicacid as carbon source. Experimental results indicate that the ob-tained SN-CQDs have a uniform size and are modified by amine and sulphonic acid groups at their surface. Unlike previous reports, the SN-CQDs show the excitation-wavelength-independent photolu-minescence behavior and their fluorescence can be quenched by Fe3+ ions. There is a good linear relationship between the Fe3+ concentrations within 0-10 -3 mol·L-1 and the fluorescence quench-ing rates of SN-CQDs. The detecting limit for Fe3+ ions is about 10 -7 mol·L-1 . The obtained SN-CQDs have the ability of high selectivity, high sensitivity and good anti-jamming capability to ferric iron ions. Accordingly, SN-CQDs can be used for the detection of Fe3+ ions in the environment and organism.关键词
碳量子点/三价铁离子/荧光猝灭Key words
carbon quantum dots/ferric iron ion/fluorescence quenching分类
化学化工引用本文复制引用
张文宇,常青,周雨锋,魏志佳,李凯凯,胡胜亮..一步合成硫、氮共掺杂的碳量子点及其在Fe3+检测中的应用[J].发光学报,2016,37(4):410-415,6.基金项目
国家自然科学基金(51172214,51272301) （51172214,51272301）
山西省优秀青年科学基金(2014021008)资助项目 （2014021008）
