论文部分内容阅读
铁(Ⅱ)能在具有催化活性的纳米TiO2表面产生化学发光辐射,表面活性剂十六烷基三甲基溴化铵(CTAB)的存在能显著增敏此发光强度。此外,纳米氧化钛也能增强Fenton反应的化学发光强度,据此,建立了纳米TiO2-CTAB-Fenton化学发光新体系检测铁(Ⅱ)的新方法。在优化条件下,亚铁离子在1.0×10-8~1.0×10-6mol/L浓度范围内与其化学发光强度呈现良好的线性关系,对1.0×10-7mol/L浓度的亚铁离子平行测定5次,相对标准偏差为3.9%,检出限为4.0×10-9mol/L。文中还对化学发光反应机理进行了初步探讨。
Iron (II) can generate chemiluminescent radiation on the surface of catalytically active nano-TiO2. The presence of the surfactant CTAB can significantly enhance the luminescence intensity. In addition, nano-TiO2 can also enhance the chemiluminescence intensity of Fenton reaction. Thus, a new method for the determination of iron (II) by nano-TiO2-CTAB-Fenton chemiluminescence system has been established. Under optimized conditions, ferrous ions show a good linear relationship with their chemiluminescence intensities in the range of 1.0 × 10-8 ~ 1.0 × 10-6 mol / L, and the ferrous ions in parallel with 1.0 × 10-7mol / L ferrous ions 5 times, the relative standard deviation was 3.9%, the detection limit was 4.0 × 10-9mol / L. In this paper, the mechanism of chemiluminescence reaction is also discussed.