One-step synthesis of isoreticular metal–organic framework-8 derived hierarchical porous carbon and its application in differential pulse anodic stripping voltammetric determination of Pb(ii)

摘要: A novel nanoporous carbon material (NPC) was prepared by simple pyrolysis of an isoreticular metal–organic framework-8 (IRMOF-8) at 1000 °C. The obtained NPC possessed a three-dimensional hierarchy micro-, meso-, and macropores, high surface area 1715 m2 g−1 large pore volume 1.70 cm3 g−1. By using Nafion bismuth films as co-modifiers, the further used for fabrication sensitive NPC–Nafion/bismuth composite modified glassy electrode (NPC–Nafion/Bi/GCE) electrochemical determination Pb(II) in aqueous solution. synergistic effect Bi films, well activated area, hierarchical porous texture, good electrical conductivity contributed to enhanced response NPC–Nafion/Bi/GCE during differential pulse anodic stripping voltammetry. Under optimum conditions, fabricated exhibited two linear ranges varying from 1–7 μg L−1 7–70 L−1, respectively. detection limit estimated be 0.8 (at signal-to-noise ratio 3) Pb(II), which about 12 times lower than guideline value set World Health Organization (WHO) drinking water. showed reproducibility, with relative standard deviations 6.2% 3.4% multiple successive measurements 10 50 successfully analyses tap-water samples, recoveries were various spiked values.