PrGO decorated TiO2 nanoplates hybrid nanocomposite for augmented NO2 gas detection with faster gas kinetics under UV light irradiation
Harathi N. Bollu M. Pasupuleti K.S. Tauanov Z. Peta K.R. Kim M.-D. Reddeppa M. Sarkar A. Rao V.N.
1 May 2022Elsevier B.V.
Sensors and Actuators B: Chemical
2022#358
Controlling the anatase TiO2 based-rectangular nanoplates (NPs) with {001} faces have gained immense interest in gas sensors applications, since the rectangular NPs of {001} planes are highly reactive for the adsorption of oxygen species that led to significant improvement in gas sensing performance. In this work, we report on the room temperature (RT) NO2 gas sensing performances of hybrid nanocomposites with the interpenetrated network using p-Phenylenediamine-reduced graphene oxide (PrGO) decorated TiO2 NPs. The fabricated TiO2 NPs/PrGO heterostructure sensor demonstrated the superior NO2 response (∼14.9% to 100 ppm of NO2) compared to TiO2/rGO and pristine TiO2 nanoplates. On the other hand, the TiO2 NPs/PrGO heterostructure device showed high sensitivity, repeatability and excellent selectivity with short response/recovery times towards NO2 gas at RT. Further, the performances of the TiO2NPs/PrGO gas sensor was accelerated by UV irradiation (λ = 365 nm), and the response was found as ~35.68% to 100 ppm of NO2 at RT, which was ~2.35-fold times higher than the dark condition. The high gas sensing performance would be attributed to the electrical sensitization of PrGO and the ample interface between TiO2 NPs and PrGO that stimulated the charge separation with faster charge transport characteristics. Our strategy and results shed new light to exploit diverse functionalized materials to the high response gas sensors at RT.
Hybrid nanocomposite , NO2 gas sensor , P-Phenylenediamine , rGO , TiO2 nanoplates
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Department of Electronics & Instrumentation Engineering, Sree Vidyanikethan Engineering College, Andhra Pradesh, 517102, India
Department of Physics, Sri Venkateswara University, Tirupati, 517502, India
Department of Physics, Chungnam National University, 99 Daehak-ro, Daejeon, Yuseong-gu, 34134, South Korea
Faculty of Chemistry and Chemical Technology al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Department of Electronic Science, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
Department of Electrical Engineering and Computer Science, University of Michigan, 1301 Beal Avenue, Ann Arbor, 48109-2122, MI, United States
Electronics and Communication Engineering, Vishnu Institute of Technology, Andhra Pradesh, Bhimavaram, 534202, India
National nanofab center, Korea advanced institute of science, Daejeon, 34141, South Korea
Department of Electronics & Instrumentation Engineering
Department of Physics
Department of Physics
Faculty of Chemistry and Chemical Technology al-Farabi Kazakh National University
Department of Electronic Science
Department of Electrical Engineering and Computer Science
Electronics and Communication Engineering
National nanofab center
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