Sulfur Dioxide (SO2) Detection Using Composite of Nickel Benzene Carboxylic (Ni3BTC2) and OH-Functionalized Single Walled Carbon Nanotubes (OH-SWNTs)
Nikesh N. Ingle, Savita Mane, Pasha W. Sayyad, Gajanan A. Bodkhe, Theeazen Al‐Gahouari, Manasi Mahadik, Sumedh M. Shirsat, Mahendra D. Shirsat
Abstract
In the present investigation, composite of ‘nickel benzene carboxylic (Ni3BTC2)’ and ‘OH-functionalized single walled carbon nanotubes (OH-SWNTs)’ was synthesized by solvothermal method. The synthesized Ni3BTC2/OH-SWNTs were drop casted on gold micro electrode tip on Si/SiO2 substrate. The synthesized composite materials were characterized by X-ray diffraction (XRD) for structural analysis, electrical analysis using current-voltage (I/V) characteristics, Field emission scanning electron microscopy (FESEM) for surface morphology, Field effect transistor (FET) by using transfer and output characteristics and spectroscopic analysis using Fourier-transform infrared spectroscopy (FTIR). This composite was used for detection of SO2. The proper incorporated OH-SWNTs in Ni3BTC2 MOF exhibits increase in conductivity and sensing performance (better response and recovery time, repeatability). This work reveals that the composite of Ni3BTC2/OH-SWNTs can be used for reversible sensing of SO2 gas in ChemFET modality at room temp.