Electrochemical Properties and Band Gap Variation of Polyaniline Due to the Presence of ZnO

Srivastava, Divyanshi; Shukla, R. K.

doi:10.1007/s40010-019-00612-9

Cited by 8 publications

(2 citation statements)

References 37 publications

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“…Charge transfer occurs between the HOMO of benzenoid and the LUMO of the localized quinoid ring (ES) and it is responsible for the second absorption peak in all the PANI/BNF composites. It confirms the adsorption of PANI in the form of the conducting emeraldine salt (ES) on the betel nut filaments surfaces 56,57 . It is further supported by the retention of the green color of the conducting form of polyaniline on the fiber surfaces.…”

Section: Resultssupporting

confidence: 63%

“…It confirms the adsorption of PANI in the form of the conducting emeraldine salt (ES) on the betel nut filaments surfaces. 56,57 It is further supported by the retention of the green color of the conducting form of polyaniline on the fiber surfaces. In each batch of reactions, interestingly color of the composites is different shades of green irrespective of the color of the reaction medium.…”

Section: Uv-vis Absorption Spectramentioning

confidence: 88%

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Liquefied petroleum gas sensing activity of betel nut fiber‐polyaniline conducting composites synthesized by time‐controlled in situ polymerization

Chutia¹,

Phukan²

2023

J of Applied Polymer Sci

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In this paper, we report the liquefied petroleum gas (LPG) sensing behavior of polyaniline‐betel nut fiber (PANI/BNF) composite synthesized through a one‐step in situ oxidative polymerization method using HCl, H2SO4 and H3PO4 as doping acids. The deposition of emeraldine salt (ES) form of PANI on betel nut filament surface is explained by Fourier‐transform infrared spectroscopy (FT‐IR) and Ultraviolet–Visible (UV–vis) spectroscopy. Scanning electron microscopy (SEM) revealed that PANI particle size decreased and the thickness of the coated PANI layer increased with reaction time. Optical band gap of Polyaniline‐Betel nut fiber composites (PB) PB‐2, PB‐4 and PB‐6 were found be 3.68, 3.37, and 2.75 eV using the Tauc plot. X‐ray diffraction (XRD) analysis and thermogravimetric (TG) analysis showed that HCl‐doped PANI/BNF composites have high crystallinity and thermal stability as compared to the composites formed using H2SO4 and H3PO4. The electrical conductivity of the composites was determined by using a multimeter (Keithley Model 2000). The conducting filaments showed good resistive sensing activity toward LPG with minimum (100 ppm) 26% and maximum (1300 ppm) 44% of response sensitivity with decreasing response time and increasing recovery time. The plausible response mechanism of PANI/cellulose sensor toward LPG operating at room temperature is also discussed.

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Section: Resultssupporting

confidence: 63%

Section: Uv-vis Absorption Spectramentioning

confidence: 88%