【摘要】 采用溶胶凝胶法制备出一种荧光性能稳定的氧化锌量子点（ZnO-NH₂ QDs）,并对其进行紫外-可见光谱（UV-Vis）、傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）、荧光（PL）表征。基于Cu²⁺对ZnO-NH₂ QDs动态荧光猝灭且Cu²⁺可与邻苯二胺（OPD,为非荧光物质）反应生成具有黄色荧光的2,3-二氨基吩嗪（DAP）的机理，开发了一种具有特异性识别Cu²⁺的ZnO-NH₂ QDs荧光探针以及ZnO-NH₂ QDs+Cu²⁺+OPD荧光传感系统。该探针在40～9 000 nmol/L的线性范围内检测Cu²⁺,检测限（LOD）为3.93 nmol/L。在自来水中的加标回收率范围为98%～100.58%,在柳江水中Cu²⁺的加标回收率范围为97.43%～101.47%。实验结果表明该探针对Cu²⁺有较好的选择性和准确度，能为金属离子Cu²⁺的荧光快速检测提供一种新思路。更多还原

【Abstract】 In this paper, a kind of fluorescence stable ZnO-NH₂ QDs was prepared by sol-gel method. ZnO-NH₂ QDs were characterized by UV-visible spectroscopy（UV-Vis）, Fourier transform infrared spectroscopy（FTIR）, X-ray diffraction（XRD）, transmission electron microscopy（TEM）, X-ray photoelectron spectroscopy（XPS）, and fluorescence（PL）. Based on the dynamic fluorescence quenched of ZnO-NH₂ QDs by Cu²⁺ and the mechanism that Cu²⁺ can react with o-phenylenediamine（OPD, a non-fluorescent substance） to form 2, 3-diaminophenothiazine（DAP） with yellow fluorescence, a fluorescent probe for ZnO-NH₂ QDs with specific recognition of Cu²⁺ and a ZnO-NH₂ QDs+Cu²⁺+OPD fluorescence sensing system were developed. The probe detected Cu²⁺ over a linear range of 40-9 000 nmol/L with detection limit of 3.93 nmol/L. The recovery rate of standard addition ranged from 98% to 100.58% in tap water, and that was 97.43% to 101.47% in Liujiang water. The experimental results show that the probe has good selectivity and accuracy for Cu²⁺, which can provide a new idea for the fluorescence rapid detection of Cu²⁺ metal ions.更多还原