天津工业大学学报2017，Vol.36Issue(2)：37-41,5.DOI:10.3969/j.issn.1671-024x.2017.02.007
氮掺杂石墨烯量子点对Cr(Ⅵ)的选择性检测
Nitrogen-doped graphene quantum dots for selective detection of Cr(Ⅵ)
摘要
Abstract
In order to prepare the detection material with good biocompatibility for Cr (Ⅵ) ion, the nitrogen-doped graphene quantum dots (N-GQDs) were synthesized by hydrothermal method using critic acid as carbon source and ammonia as nitrogen source. The obtained N-GQDs have good water-soluble and perfect fluorescence prop-erties. Using N-GQDs as the fluorescent probe, the selective detection of Cr (Ⅵ) in aqueous solution was based on the principle that the fluorescence of N-GQDs can be quenched by Cr (Ⅵ). The effects of hydrothermal tem-perature, reaction time and pH value of the solution on the fluorescence intensity of N-GQDs were also studied. The microstructures of N-GQDs were characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The experimental results indicated that with the increase of the hydrot-nermal temperature, reaction time and pH value, the fluorescence intensity of N-GQDs firstly increased and then decreased;when the hydrothermal temperature was 180℃, reaction time was 10 h, and the pH was 7.0, the N-GQDs had the highest fluorescence intensity. Under the optimum conditions, the N-GQDs fluorescent probe has detection limit as low as 50 nmol/L in aqueous solution.关键词
氮掺杂石墨烯量子点/荧光探针/六价铬离子/选择性检测Key words
nitrogen-doped graphene quantum dots(N-GQDs)/fluorescent probe/Cr(Ⅵ)/selective detection分类
化学化工引用本文复制引用
张纪梅,蔡宇玲,张志秋,范咏梅,米超..氮掺杂石墨烯量子点对Cr(Ⅵ)的选择性检测[J].天津工业大学学报,2017,36(2):37-41,5.基金项目
国家自然科学基金资助项目(21106101) （21106101）
天津市应用基础及前沿技术研究计划项目(12JCZDJC29500) （12JCZDJC29500）
