论文标题
功能化的CDTE荧光纳米传感器，用于敏感的水传播环境危险金属离子
Functionalized CdTe Fluorescence Nanosensor for the Sensitive Detection of Water Borne Environmentally Hazardous Metal Ions
论文作者
论文摘要
在这项工作中，我们研究了使用COOH官能化的CDTE量子点（QD）作为荧光纳米传感器的可能性，以检测某些环境危险的金属离子（$ \ rm {Cr^{3+}}} $，$ \ rm {pb^{pb^{2+}} $，$，$，$，$ $ \ rm {zn^{2+}} $和$ \ rm {co^{2+}} $在水性阶段中。 COOH-CDTE QD在水性培养基中制备，以紫外可见的光发光和FTIR光谱法进行了特征。观察到CDTE纳米传感器的光学响应是时间和温度依赖性的。在存在所有金属离子的情况下，观察到CDTE的强烈“关闭”荧光响应（$ \ rm {x^{n+}} $）。 STERN VOLMER关系，图形作业的图和FTIR数据的输出确定了CDTE和金属离子之间的强1：1络合物（$ \ rm {x ^{n+}： ^{ - } ooc-cdte）} $。 CDTE显示了$ \ rm {pb^{2+}} $，$ \ rm {cr^{3+}} $和$ \ rm {cu^{2+}} $ ions的有效传感能力此外，$ \ frac {f-f_ {0}} {f_ {0}} $的强大外观确立了CDTE QD的更好的感应能力，以$ \ rm {Cr^{3+}} $，$ \ rm {pb^{2+}} $，$ \ rm \ rm rm {cu}传感器可在行业中提供。提出的光学技术和感应的主要成分分析成功地用于测试溶解的金属离子在实际样品中的溶解金属离子，例如：油漆，河水，雨水等，验证了COOH功能化的CDTE纳米传感器的适用性，作为有效的成功的光学传感器，用于溶解的金属离子，这些溶解金属离子负责水污染。
In this work, we have investigated the possibility of using COOH functionalized CdTe quantum dots (QDs) as fluorescent nanosensor for the detection of some environmentally hazardous metal ions ($\rm{Cr^{3+}}$, $\rm{Pb^{2+}}$, $\rm{Cu^{2+}}$, $\rm{Zn^{2+}}$ and $\rm{Co^{2+}}$) in aqueous phase. COOH-CdTe QDs are prepared in aqueous medium and characterized by UV-visible, photo luminescence and FTIR spectrometry. Optical response of CdTe nanosensor is observed to be time and temperature dependent. A strong "Turn-Off" fluorescence response of CdTe is observed in presence of all metals ions ($\rm{X^{n+}}$). The output of Stern volmer relation, graphical Job's plot and FTIR data established the existence of strong 1:1 complexation ($\rm{X^{n+}: ^{-}OOC-CdTe)}$ between CdTe and metal ions. CdTe shows its efficient sensing ability for $\rm{Pb^{2+}}$, $\rm{Cr^{3+}}$ and $\rm{Cu^{2+}}$ ions up to concentration $\rm{10^{-14}}$ M which was established by its low detection of limit (LOD)validation. Further, strong appearance of $\frac{F-F_{0}}{F_{0}}$ establishes the better sensing capability of CdTe QDs for $\rm{Cr^{3+}}$, $\rm{Pb^{2+}}$, $\rm{Cu^{2+}}$ ions which are far better than the existing fluorescent sensors available in industry. The proposed optical techniques and principal component analysis of sensing were successfully applied for testing of dissolved metal ions in real samples like: paint, river water, rain water etc which validates the applicability of COOH functionalized CdTe nanosensor as a effective successful optical sensor for water dissolved metal ions which are responsible for water pollution.
