Bismuth Metal–Organic Framework/Carbon Nanosphere Composites for Ultrasensitive Simultaneous Electrochemical Detection of Lead and Cadmium
Source abstract
Abstract
An amino-functionalized bismuth metal–organic framework (Bi-BDC-NH 2 ) composited with nitrogen-doped mesoporous carbon nanosphere (NMCS) was prepared to fabricate a Bi-BDC-NH 2 @NMCS electrochemical sensor for simultaneous determination of Pb(II) and Cd(II). The synthesized Bi-BDC-NH 2 was granular, amorphous, and loosely aggregated to form a porous structural composition where NMCS was embedded. The large specific area and exposed sites of Bi-BDC-NH 2 @NMCS copromote the adsorption and electron transfer of metal ions on the electrode surface. Compared with the traditional bismuth film electrode, the Bi-BDC-NH 2 @NMCS electrode can improve the charge transfer, stability, and conductivity. The developed method exhibited superior stripping performance with a detection limit of 0.36 ng mL –1 for Pb(II) and 0.44 ng mL –1 for Cd(II), respectively, and a linear range of 1.0–1500 ng mL –1 . It was applied to detect Pb(II) and Cd(II) in liver, fish, and shrimp samples with recoveries of 93.6–99.7% and 94.4–103.2%, respectively.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electrochemical Analysis and Applications · Conducting polymers and applications · Electrochemical sensors and biosensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, P. R. China
School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, P. R. China
Funding
National Natural Science Foundation of China
References (55)
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