Fabrication of capacitive sensor based on Cu-BTC (MOF-199) nanoporous film for detection of ethanol and methanol vapors

•Using IL [C8 mim][Cl] (1-methyl-3-octylimidazolium chloride) for the first time as conducting salt in the electrochemical synthesis of Cu-BTC layer.•Application of fabricated nanosensor for VOC detection at room temperature.•Fabrication of capacitive nanosensor by using electrochemical synthesized Cu-BTC film for the first time.•Detection of ethanol and methanol by a capacitive nanosensor which its dielectric layer (Cu-BTC film) was prepared through an electrochemical method.