01782nas a2200241 4500008004100000022001500041245006600056210006500122260000800187300001400195490000700209520104800216100002501264700001901289700002101308700002001329700001801349700001801367700002401385700001801409700001901427856009401446 2018 eng d a 1530-437X00aEvaluation of humidity sensor based on PVP-RGO nanocomposites0 aEvaluation of humidity sensor based on PVPRGO nanocomposites cNOV a9097-91040 v183 a
his paper describes the humidity sensing properties of one step in situ synthesized poly (N-vinyl pyrrolidone)- reduced graphene oxide (PVP-RGO) nanocomposites. Different PVP-RGO nanocomposites were obtained by varying PVP/GO weight %ratio as x/50 mg, wherein x = 25, 50, and 75 mg, respectively. The real-time adsorption kinetics of the water molecules during the humidity sensing were also discussed using Elovich model, pseudo first and second order equations. The increase in humidity response of 1.5 PVP-RGO nanocomposite is attributed to the presence of large amount of oxygen functionalities. The above observation was corroborated using spectroscopic analysis. The optimized PVP-RGO nanocomposite showed faster response kinetics with response and recovery times of 10 and 20 s, respectively. The present humidity sensor shows remarkable linearity over the range of 20-90%RH. More specifically, sensitivity was correlated with oxygen functionalities created due to variation of PVP during the functionalization of RGO nanosheets.
1 aBhangare, Bhagyashri1 aJagtap, Shweta1 aRamgir, Niranjan1 aWaichal, Rupali1 aMuthe, K., P.1 aGupta, S., K.1 aGadkari, Sanjay, C.1 aAswal, D., K.1 aGosavi, Suresh uhttp://library.ncl.res.in/content/evaluation-humidity-sensor-based-pvp-rgo-nanocomposites