Defect- and phase-engineering of Mn-mediated MoS2 nanosheets for ultrahigh electrochemical sensing of heavy metal ions: chemical interaction-driven in situ catalytic redox reactions

Abstract

An ultrasensitive electrochemical detection of heavy metal ions is achieved via defect- and phase-engineering of Mn-mediated MoS₂ nanosheets. We find for the first time that chemical interactions between Pb(II) and active S atoms in Mn–MoS₂ facilitate the electron transfer and in situ catalytic redox reactions.