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An engineered nanocomposite for sensitive and selective detection of mercury in environmental water samples
Analytical Methods ( IF 2.7 ) Pub Date : 2018-04-30 00:00:00 , DOI: 10.1039/c8ay00618k Ibrahim H. Abdullah 1, 2, 3, 4, 5 , Nashaat Ahmed 1, 2, 3, 4, 5 , Mona A. Mohamed 5, 6, 7, 8 , Fawzy M. A. Ragab 5, 8, 9, 10 , Marwa T. A. Abdel-Wareth 5, 8, 9, 10 , Nageh K. Allam 1, 2, 3, 4, 5
Analytical Methods ( IF 2.7 ) Pub Date : 2018-04-30 00:00:00 , DOI: 10.1039/c8ay00618k Ibrahim H. Abdullah 1, 2, 3, 4, 5 , Nashaat Ahmed 1, 2, 3, 4, 5 , Mona A. Mohamed 5, 6, 7, 8 , Fawzy M. A. Ragab 5, 8, 9, 10 , Marwa T. A. Abdel-Wareth 5, 8, 9, 10 , Nageh K. Allam 1, 2, 3, 4, 5
Affiliation
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We report on a novel carbon-based nanocomposite made of reduced graphene oxide/titania nanotubes (RGO/TNT) with excellent conductivity and absorptivity for the sensitive electrochemical determination of Hg(II) as a water pollutant. Field emission scanning electron microscopy, high resolution transmission electron microscopy, X-ray diffraction, FTIR spectroscopy, cyclic voltammetry, and electrochemical impedance spectroscopy were used to characterize the morphological, structural, and electrochemical properties of the fabricated modifier. Square wave anodic stripping voltammetry was applied for the analytical measurements. The parameters influencing the peak current response were studied and optimized. The linear response of detection toward Hg(II) was found to be in the range of 2.5 × 10−10–5 × 10−6 M with a high regression coefficient (0.999). The limit of detection was found to be 4 × 10−11 M. The investigated sensing platform was tested for Hg(II) simultaneously in the presence of Cu(II) and Mn(II) and proved to have high sensitivity, selectivity, and reproducibility. Finally, the modified electrode was used for the trace level detection of Hg(II) in real environmental water samples, showing promising results.
中文翻译：
一种工程化的纳米复合材料，用于灵敏和选择性地检测环境水样中的汞
我们报告了一种新型的碳基纳米复合材料，该材料由还原的氧化石墨烯/二氧化钛纳米管（RGO / TNT）制成，具有出色的电导率和吸收率，可用于敏感电化学测定Hg（II）作为水污染物。场发射扫描电子显微镜，高分辨率透射电子显微镜，X射线衍射，FTIR光谱，循环伏安法和电化学阻抗谱用于表征所制备改性剂的形态，结构和电化学性能。方波阳极溶出伏安法用于分析测量。研究并优化了影响峰值电流响应的参数。检测对Hg（II）的线性响应）被发现在2.5×10 -10 –5×10 -6 M的范围内，具有高回归系数（0.999）。发现的检测极限为4×10 -11M。在Cu（II）和Mn（II）的存在下，同时对所研究的传感平台进行了Hg（II）的测试，并证明了其高灵敏度，选择性和高灵敏度。重现性。最后，被用于汞（痕量水平检测的修饰电极II真实环境水样中），示出了有希望的结果。
更新日期：2018-04-30
中文翻译：
一种工程化的纳米复合材料，用于灵敏和选择性地检测环境水样中的汞
我们报告了一种新型的碳基纳米复合材料，该材料由还原的氧化石墨烯/二氧化钛纳米管（RGO / TNT）制成，具有出色的电导率和吸收率，可用于敏感电化学测定Hg（II）作为水污染物。场发射扫描电子显微镜，高分辨率透射电子显微镜，X射线衍射，FTIR光谱，循环伏安法和电化学阻抗谱用于表征所制备改性剂的形态，结构和电化学性能。方波阳极溶出伏安法用于分析测量。研究并优化了影响峰值电流响应的参数。检测对Hg（II）的线性响应）被发现在2.5×10 -10 –5×10 -6 M的范围内，具有高回归系数（0.999）。发现的检测极限为4×10 -11M。在Cu（II）和Mn（II）的存在下，同时对所研究的传感平台进行了Hg（II）的测试，并证明了其高灵敏度，选择性和高灵敏度。重现性。最后，被用于汞（痕量水平检测的修饰电极II真实环境水样中），示出了有希望的结果。
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