Sensitive electrochemical Detection of Pb(II) and H2O2 via a Dual-functional Sn-doped Defective Bi2S3 Microspheres

In this work, a dual-functional electrochemical sensor has been proposed based on Sn-doped defective Bi2S3 (TDDB) microspheres, which exhibited the excellent electrochemical performance on Pb(II) and H2O2 detection. The TDDB offered a satisfied detection limit of 8.0 nM towards Pb(II) with a sensitivity of 96.7 mu A . mu M-1. As a H2O2 sensor, a high sensitivity of 3540 mu A 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 H2O2 in human serum was achieved with high reliability and good recovery.

Automated summary

A dual-functional electrochemical sensor based on TDDB microspheres has been proposed in this work, showing excellent electrochemical performance for Pb(II) and H2O2 detection with high sensitivity and low detection limits. The sensor exhibited high reliability and good recovery in the electrochemical detection of Pb(II) in lake water and H2O2 in human serum.