cyclodextrin (β-CD) and chitosan . ZIF-8@dimethylglyoxime/β-cyclodextrin/reduced graphene oxide (ZIF-8@DMG/β-CD/RGO) was reported for electrochemical sensing of Ni 2+ using differential pulse adsorptive stripping voltammetry (DP AdSV, Table ) . CelloZIFPaper was used without the need for GCE or chelating agents such as DMG, β-CD, or rGO . Zn/Ni-ZIF-8/Carbon black (XC-72)/Nafion/GCE was used for the detection of Pb 2+ and Cu 2+ using differential pulse voltammetry (DPV, Table ) . It showed good selectivity towards both of the studied metal ions based on each species' reduction potential . However, the electrode preparation is tedious and suffers from particle aggregation. ZIF8-derived Ag@Au core-shell nanoparticles (Ag@Au/ZIF-8) were modified with an aptasensor modifier and loaded into AE for successful selective detection of Hg 2+ . However, electrode fabrication requires expensive chemical reagents. CelloZIFPaper is promising as a lab-on-paper application for label-free detection of heavy metal ions in aqueous solutions. CelloZIFPaper could potentially be used for related applications, for instance, the adsorption of volatile organic compounds and toxic gases.