Investigation of chemical bonding and electronic network of rGO/PANI/PVA electrospun nanofiber
- PDF / 2,147,710 Bytes
- 17 Pages / 439.37 x 666.142 pts Page_size
- 96 Downloads / 196 Views
Investigation of chemical bonding and electronic network of rGO/PANI/PVA electrospun nanofiber W. Ishwarchand Singh1 · Sayantan Sinha1 · Naorem Aruna Devi1 · Sumitra Nongthombam1 · Soumyadeep Laha2 · Bibhu P. Swain1 Received: 30 June 2020 / Revised: 20 October 2020 / Accepted: 1 November 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Reduced graphene oxide-reinforced polyaniline and poly(vinyl alcohol) (PVA/ PANI/rGO) nanofibers were synthesized by electrospinning method with different rGO content varying from 1 to 5wt%. The PVA/PANI/rGO nanofibers were characterized by SEM, FTIR, Raman, XPS and UV–visible spectroscopy to investigate the morphology, vibrational bonding, elemental composition and optical properties, respectively. The XRD results reveal the broad peak at 2θ = 25° corresponding to (002) for rGO and three peaks at 2θ = 14°, 20° and 25° corresponding to (011), (020) and (200), respectively for PANI. The FTIR signatures at 1088, 1245, 1359, 1411, 1717, 2930 and 3305 cm−1 correspond to ν-(C–O), ν-(N–H), ν-(C–OH), ν-(C=O), ν-(C–H) and ν-(O–H), respectively. The optical bandgap of PVA/PANI/ rGO nanofibers was decreased from 4.20 to 4.07 eV as the rGO wt% increased. The structural and electronic network of carbon was analyzed by semiempirical Gaussian peaks to predict various binding energy of core orbital binding energy spectra in PVA/PANI/rGO nanofibers. Keywords Optical properties · Electrospinning · PVA/PANI/rGO · Nanofibers · XRD · SEM
Introduction In the recent few decades, nanoscales polymer fibers have become the choice of research for many researchers due to their numerous applications such as sensors and energy storage, wound healing, filtrations, engineering tissue scaffolds, * Bibhu P. Swain [email protected]; [email protected] 1
Department of Physics, National Institute of Technology Manipur, Imphal West, Langol, Manipur 795004, India
2
University Science Instrumentation Centre, University of North Bengal, Raja Rammohunpur, West Bengal 734013, India
13
Vol.:(0123456789)
Polymer Bulletin
electroconductive, UV-protecting, photocatalytic, antibacterial and electrodes for batteries because of their chemical and physical properties [1–10]. Poly(aniline) (PANI) is a conductive polymer that has been used in many optical, electronic and electrochemical applications, characterized by good environmental stability, due to its low cost, good electrical conductivity and redox reversibility [11, 12]. However, electrospinning of PANI nanofibers is a challenging process because of its rigid backbone due to its high aromaticity [13, 14]. In this matter, non-conductive polymers such as PVA incorporation to PANI to prepare composite fibers showing enhanced thermal stability, improved conductivity, good crystallinity and high solubility in common organic solvents were recently reported [15, 16]. Besides these advantages of PVA/PANI nanocomposite, some disadvantages exist such as poor mechanical properties [17, 18]. In this regard, incorporation of reduc
Data Loading...
