AUTHOR=Ingle Nikesh , Mane Savita , Sayyad Pasha , Bodkhe Gajanan , AL-Gahouari Theeazen , Mahadik Manasi , Shirsat Sumedh , Shirsat Mahendra D. 

TITLE=Sulfur Dioxide (SO2) Detection Using Composite of Nickel Benzene Carboxylic (Ni3BTC2) and OH-Functionalized Single Walled Carbon Nanotubes (OH-SWNTs)

JOURNAL=Frontiers in Materials

VOLUME=7

YEAR=2020

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2020.00093

DOI=10.3389/fmats.2020.00093

ISSN=2296-8016

ABSTRACT=<p>In the present investigation, a composite of “nickel benzene carboxylic (Ni<sub>3</sub>BTC<sub>2</sub>)” and “OH-functionalized single walled carbon nanotubes (OH-SWNTs)” was synthesized using the solvothermal method. The synthesized Ni<sub>3</sub>BTC<sub>2</sub>/OH-SWNTs were drop casted on gold micro electrode tip on Si/SiO<sub>2</sub> 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 the detection of SO<sub>2</sub>. The proper incorporated OH-SWNTs in Ni<sub>3</sub>BTC<sub>2</sub> MOF exhibits increased conductivity and sensing performance (better response and recovery time and repeatability). This work reveals that the composite of Ni<sub>3</sub>BTC<sub>2</sub>/OH-SWNTs can be used for reversible sensing of SO<sub>2</sub> gas in ChemFET modality at room temperature.</p>