An efficient electrochemical sensor based on three-dimensionally interconnected mesoporous graphene framework for simultaneous determination of Cd(II) and Pb(II)

摘要: Abstract Recently, ordered mesoporous carbon has displayed attractive performance in electrochemical catalysis and sensing, benefiting from its rich tunable pore texture. In this work, a novel sensor based on three-dimensionally interconnected graphene framework (MGF) was developed for simultaneous determination of Cd(II) Pb(II) aqueous solution. Attributable to the abundant three-dimensional mesopores good electrical conductivity MGF, as well synergistic effect Nafion in-situ plated bismuth films, highly sensitive mixed metals at Bi/MGF-Nafion/GCE is achieved. The proposed exhibits wide linear responses Pb(II), ranging 2–70 μg L −1 0.5–110 μg L , respectively. detection limits are about 0.5 0.1 μg L respectively, which 6 100 times lower than drinking water standards set by World Health Organization (WHO). Moreover, been applied real samples. satisfying recoveries (87.5-109.2%) relative standard deviations (RSD, 3.7-8.6%) make electrode promising candidate rapid on-site monitoring environmental metallic pollutants.