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Sensitive Electrochemical Detection of Pb(II) and H 2 O 2 via a Dual‐functional Sn‐doped Defective Bi 2 S 3 Microspheres
Author(s) -
Fu Yanqiu,
Li Jinrui,
Jin Wei,
Liu Zhonggang
Publication year - 2021
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.202060498
Subject(s) - detection limit , electrochemistry , materials science , analytical chemistry (journal) , doping , microsphere , sensitivity (control systems) , electrochemical gas sensor , nuclear chemistry , optoelectronics , chemistry , electrode , chemical engineering , chromatography , electronic engineering , engineering
In this work, a dual‐functional electrochemical sensor has been proposed based on Sn‐doped defective Bi 2 S 3 (TDDB) microspheres, which exhibited the excellent electrochemical performance on Pb(II) and H 2 O 2 detection. The TDDB offered a satisfied detection limit of 8.0 nM towards Pb(II) with a sensitivity of 96.7 μA ⋅ μM −1 . As a H 2 O 2 sensor, a high sensitivity of 3540 μA mM −1 cm −2 was obtained in a linear range from 0.45 mM to 10 mM with a detection limit of 10 nM. Moreover, the electrochemical detection of Pb(II) in Taihu Lake and H 2 O 2 in human serum was achieved with high reliability and good recovery.