Abstract：
Particle extraction via the liquid-liquid interface (PELLI) method has been utilized to produce Di-(2-ethylhexyl) phosphate (DEHP) coated MnO2 fluorescent nanoprobe denoted as MnO2@DEHP for the selective detection of Fe3+ ions. The synthesized MnO2@DEHP nanoprobe was characterized by various instrumental techniques such as FT-IR, PXRD, TEM, EDAX, HRTEM, DLS, and XPS. Since the high concentration of Fe3+ in waste water leads to water pollution, which in turn affects the ecosystem, and causes severe health hazards. Therefore, accurate detection of Fe3+ ions in the aqueous systems is essential as they are involved in various chemical and biological processes in living things. Here, the synthesized MnO2@DEHP nanoprobe selectively detects Fe3+ ions in the presence of various metal ions in an aqueous media by fluorescence quenching (turn-off) mechanism. The limit of detection (LOD) of MnO2@DEHP nanoprobe for Fe3+ was found to be 0.49 µM. The test-strip method and real water sample analysis were also used to demonstrate the viability of MnO2@DEHP as a fluorescent nanoprobe to detect Fe3+ ions visually and in environment monitoring applications.
摘要：
通过液-液界面（PELLI）方法进行的颗粒提取已用于生产二-（2-乙基己基）磷酸酯（DEHP）涂覆的MnO2荧光纳米探针，称为MnO2@DEHP，用于选择性检测Fe3离子。合成的MnO2@DEHP纳米探针通过各种仪器技术如FT-IR,PXRD,TEM,EDAX,HRTEM,DLS,和XPS。由于废水中高浓度的Fe3+会导致水污染,进而影响生态系统，并造成严重的健康危害。因此,精确检测水系统中的Fe3+离子是必不可少的，因为它们涉及生物的各种化学和生物过程。这里,合成的MnO2@DEHP纳米探针通过荧光猝灭（关闭）机制在水性介质中存在各种金属离子的情况下选择性地检测Fe3离子。MnO2@DEHP纳米探针对Fe3的检测限（LOD）为0.49µM。还使用测试条法和实际水样分析来证明MnO2@DEHP作为荧光纳米探针的可行性，可以在视觉上和环境监测应用中检测Fe3离子。
