A facile synthesis of a novel three‐phase nanocomposite: Single‐wall carbon nanotube/silver nanohybrid fibers embedded in sulfonated polyaniline

Abstract

A three-phase water-soluble nanocomposite of single wall carbon nanotube/silver nanoparticle hybrid fibers embedded in sulfonated polyaniline has been synthesized by a simple chemical solution mixing process. The nanocomposite has been characterized by high resolution electron microscopy, X-ray diffractometry, FTIR spectroscopy, Raman spectroscopy, and thermogravimetric analysis. Optical and electrical characteristics of the nanocomposite have been determined by UV-vis absorption spectroscopy, photoluminescence spectroscopy, and four-probe electrical conductivity measurement. A surface plasmon absorption band obtained around 460 nm indicates the presence of silver nanoparticles in the composite. The optical band gap calculation for sulfonated polyaniline vis-a-vis the nanocomposite supported the conductivity measurement. Over 1300 times increase in DC electrical conductivity has been observed for the three-phase nanocomposite, with a filler loading of 20 wt %, at 306 K. This observation could be explained by Mott's variable range hopping model considering a three-dimensional conduction. Such a nanocomposite has immense potential for use as a cathode material in lithium-ion batteries and supercapacitors.

Synergetic effect of synthesized sulfonated polyaniline/quaternized graphene and its application as a high-performance supercapacitor electrode

“…In the spectrum of nanohybrid, the adsorption peak located to 1566 and 1502 cm -1 is assigned to the C=C stretching of the benzene ring on the q-graphene and benzenoid rings of s-PANINa, respectively, demonstrate the presence of s-PANINa and q-graphene in the nanohybrid. Furthermore, the strong bond centered at 1128 cm -1 is associated to a high degree of delocalization of electrons and high conductivity of the polymer for the nanohybrid, which is also confirmed by enhanced electrical conductivity of the nanohybrid [29].…”

“…The peak at 1339 and 1174 cm -1 arises from the C-N ? stretching and C-H bending of the quinoid/ benzenoid ring, respectively [29]. The Raman spectrum of reduced graphene oxide (rGO) exhibits two strong peaks, the G band at 1589 cm -1 and the D band at 1314 cm -1 .…”

Comparison studies on covalently and non‐covalently modified MWNTs using chitosan and their starch nanocomposites

“…. The diffractogram of oxidized MWNTs exhibited two characteristic peaks at 2θ = 25.8 and 43.0°, corresponding to the 002 and 100 reflections of the graphitic plane , respectively. These two peaks appeared as expected in the diffractograms of MWNTs/CS and MWNTs‐CS.…”

Graphene–metal oxide nanohybrids for toxic gas sensor: A review

“…Relatively good quality graphene can be prepared at temperatures above 800 °C by incorporation of nickel nanoparticles which substantially eliminates the oxygen containing impurities and hence have great potential in graphene based applications including sensors. The authors of this review have also developed methods to grow SWCNT via chemical vapour deposition [54], and methods to physically [55] and chemically [56][57][58][59] functionalize CNT and graphene [60] and for diverse potential applications including sensors.…”