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- Title
Synthesis and Characterization of Ru-MOFs on Microelectrode for Trace Mercury Detection †.
- Authors
Xiong, Chenyu; Xu, Yuhao; Bian, Chao; Wang, Ri; Xie, Yong; Han, Mingjie; Xia, Shanhong
- Abstract
Mercury ions (Hg 2 + ) pollution in the water environment can cause serious harm to human health. Trace Hg 2 + detection is of vital importance for environmental monitoring. Herein, we report a novel design of Ru-MOFs modified gold microelectrode for Hg 2 + 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 (R 2 = 0.996) from 0.1 ppb to 5 ppb, with a high sensitivity of 0.583 μ A ppb − 1 mm − 2 . 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.
- Subjects
MICROELECTRODES; MERCURY; ELECTROCHEMICAL sensors; WATER pollution; ENVIRONMENTAL monitoring; SURFACES (Technology); GOLD mining; MERCURY poisoning
- Publication
Sensors (14248220), 2020, Vol 20, Issue 22, p6686
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s20226686