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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14623
Title: A mechanistic approach for the modulation of band gap of nanopolyaniline using various heterogeneous carbon nanostructures
Authors: Kumar G.
Singh J.P.
Saha U.
Bera M.
Goswami T.H.
Maji, Pradip K.
Published in: Polymer Bulletin
Abstract: Abstract: The present work introduces a mechanistic approach for the synthesis of nanopolyaniline (nPANI) and modulation of its band gap using various carbon nanostructured materials. Carbon-based different nanostructures, viz. graphene oxide, reduced graphene oxide and multiwall carbon nanotubes, have been incorporated in situ for the preparation of nanocomposites. Polyethylene glycol (PEG)-based non-ionic surfactant-assisted oxidative polymerization of aniline was implemented. The major concern of this study is to present a possible mechanism and chemistry for the development of the nanomaterials (nPANI and its nanocomposites) and further the effect of heterogeneous carbon nanomaterials on both types of band gaps (optical and electrochemical) of nPANI in the presence of PEG. First time a comparative study between optical and electrochemical band gap has also been done to analyze the effect of carbon nanomaterials on nPANI. The prepared samples were characterized by Field-emission scanning electron microscopy, Fourier transform-infrared spectroscopy and X-ray diffraction. Electrochemical and optical properties were assessed by cyclic voltammetry (CV) and ultraviolet–visible spectroscopy (UV–Vis), respectively. The electrochemical (EgCV) and optical (Egopt) energy gap of nPANI was evaluated as 2.74 and 2.34 eV by CV and UV–Vis quantification, respectively. It was observed that incorporation of carbon nanomaterials at lower percentage improves EgCV of nPANI to as minimum as 2.34 eV as per the CV data. Schematic energy diagram showing the band gap reduction and electron transport mechanism using CV has also been presented. Graphic abstract: [Figure not available: see fulltext.] © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
Citation: Polymer Bulletin (2020), 77(7): 3499-3521
URI: https://doi.org/10.1007/s00289-019-02927-4
http://repository.iitr.ac.in/handle/123456789/14623
Issue Date: 2020
Publisher: Springer
Keywords: Band gap
Graphene oxide (GO)
Multiwall carbon nanotube (MWNT)
Nanopolyaniline (nPANI)
Reduced graphene oxide (rGO)
ISSN: 1700839
Author Scopus IDs: 57211725411
57215131044
36931301800
57193335800
35609571500
56249287900
Author Affiliations: Kumar, G., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur, UP 247001, India
Singh, J.P., Defence Materials and Stores Research and Development Establishment, DMSRDE P.O., G.T Road, Kanpur, 208013, India
Saha, U., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur, UP 247001, India, Defence Materials and Stores Research and Development Establishment, DMSRDE P.O., G.T Road, Kanpur, 208013, India
Bera, M., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur, UP 247001, India
Goswami, T.H., Defence Materials and Stores Research and Development Establishment, DMSRDE P.O., G.T Road, Kanpur, 208013, India
Maji, P.K., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur, UP 247001, India, Centre of Nanotechnology, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Funding Details: The authors gratefully acknowledge the financial support of the Ministry of Human Resource Development (MHRD), Govt. of India. The authors also thankful to all the group members of Advanced Materials Research Laboratory (AMRL), IIT Roorkee and DMSRDE Kanpur, DRDO for their unconditional support.
Corresponding Author: Maji, P.K.; Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, India; email: pradip.fpt@iitr.ac.in
Appears in Collections:Journal Publications [PE]

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