【摘要】 碳量子点的发光性质,取决于其尺寸的大小和其表面官能团的性质。本文以柠檬酸和异烟肼为原料,采用水热法一步合成了强蓝色荧光的氮掺杂的碳量子点（N-CQDs）。通过荧光猝灭法检测了多种金属离子对N-CQDs的荧光淬灭效应,结果表明,Fe³⁺可有效淬灭荧光,Fe³⁺浓度在0～400μmol·L^-1范围内,与N-CQDs的荧光淬灭程度呈良好的线性关系,检出限为9.25×10^-6 mol·L^-1。制备的N-CQDs对Fe³⁺具有高选择性、高灵敏性及较好的抗干扰能力,能作为Fe³⁺检测的传感器。更多还原

【Abstract】 The luminescence properties of carbon quantum dots depended on its size and the nature of its surface functional groups. A strong blue fluorescent nitrogen-doped carbon quantum dots（N-CQDs） were synthesized by one-step hydrothermal method using the citric acid and isoniazid as raw materials. The fluorescence quenching effect of various metal ions on N-CQDs was detected by the fluorescence quenching method. The results showed that Fe³⁺ could effectively quench the fluorescence. The Fe³⁺ concentration in the range of 0～400 μmol/L had a good linear relationship with the fluorescence quenching degree of N-CQDs, and the detection limit was about 9.25×10^-6 mol/L. The prepared N-CQDs had the high selectivity, high sensitivity and good anti-interference ability to Fe³⁺, and could be used as a sensor for the detection of Fe³⁺.更多还原