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ynthesis and Characterization of Ru-MOFs on Microelectrode for Trace Mercury Detection
Sensors ( IF 3.9 ) Pub Date : 2020-11-23 , DOI: 10.3390/s20226686
Chenyu Xiong , Yuhao Xu , Chao Bian , Ri Wang , Yong Xie , Mingjie Han , Shanhong Xia

Mercury ions (Hg2+) pollution in the water environment can cause serious harm to human health. Trace Hg2+ detection is of vital importance for environmental monitoring. Herein, we report a novel design of Ru-MOFs modified gold microelectrode for Hg2+ determination. Ru-MOFs are synthesized directly by the cathodic method on gold microelectrode, with the covered area accurately controlled. Cathodic synthesized Ru-MOFs show good conductivity and are suitable to be used as the electrode surface material directly. The synergy of the pre-deposition process and the adsorption process of Ru-MOFs can effectively improves the performance of the sensor. The results show good linearity (R2 = 0.996) from 0.1 ppb to 5 ppb, with a high sensitivity of 0.583 μA ppb1 mm2. The limit of detection is found to be 0.08 ppb and the test process is within 6 min. Most importantly, the senor has a good anti-interference ability and the recoveries are satisfactory. This miniature electrochemical sensor has the potential for on-site detection of trace mercury in the field.

中文翻译:

痕量汞微电极上Ru-MOF的合成与表征

汞离子(汞2+)水环境中的污染会严重危害人体健康。痕量汞2+检测对于环境监测至关重要。在此,我们报道了一种用于汞的Ru-MOFs修饰金微电极的新颖设计。2+决心。Ru-MOFs是在金微电极上通过阴极方法直接合成的,覆盖面积得到精确控制。阴极合成的Ru-MOF具有良好的导电性,适合直接用作电极表面材料。Ru-MOFs的预沉积过程和吸附过程的协同作用可以有效地提高传感器的性能。结果显示出良好的线性(R2 = 0.996)从0.1 ppb到5 ppb,具有0.583的高灵敏度 μ一ppb-1个 毫米-2。检出限为0.08 ppb,测试过程在6分钟内。最重要的是,该传感器具有良好的抗干扰能力,回收率令人满意。这种微型电化学传感器具有现场检测痕量汞的潜力。
更新日期:2020-11-23
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