Multifunctional polyaniline–tin oxide (PANI–SnO₂) nanocomposite: Synthesis, electrochemical, and field emission investigations

Abstract

Synthesis of PANI–SnO2 nanocomposite has been performed using a simple two step chemical oxidative polymerization route. The structural, morphological and chemical properties of the as‐synthesized PANI–SnO2 nanocomposite have been revealed by various characterization techniques such as SEM, TEM, XRD, FTIR, and XPS. Interestingly the as‐synthesized PANI–SnO2 nanocomposite exhibits supercapacitance value of 721 F g−1 with energy density 64 Wh kg−1, which is noticed to be higher than that of pristine SnO2 and PANI nanostructures. Furthermore, the galvanostatic charge–discharge characteristics revealed pseudocapacitive nature of the PANI–SnO2 nanocomposite. The estimated values of charge transfer resistance and series resistance estimated from the Nyquist plot are found to be lower. Along with the supercapacitive nature, PANI–SnO2 nanocomposite showed promising field emission behavior. The threshold field, required to draw emission current density of 1 μA/cm2, is observed to be 0.90 V/μm and emission current density of 1.2 mA/cm2 has been drawn at applied field of ∼2.6 V/μm. The emission current stability investigated at preset values of 0.02 and 0.1 mA/cm2 is observed to be fairly stable over duration of more than 3 h. The enhanced supercapacitance values, as well as, the promising field emission characteristics are attributed to the synergic effect of SnO2 nanoparticles and PANI nanotubes. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41401.

Easily Applicable Heterogeneous Catalyst from Sustainable Resources: Anchoring of Pd Nanoparticles onto Chemically Poly(2-amino thiophenol)-Modified Wool Fabrics

“…These signals, especially the latter in the N 1s spectra, can be attributed to the doped polyaniline-like conjugated polymer formation on the fabric surfaces in the emeraldine salt form. 50 The relative abundance of C�N + binding was calculated as 30.0 and 2.9% in the P2ATP-g-WSH and P2ATP/WSH samples, respectively, suggesting that a higher doping state was ensured in the P2ATP-g-WSH fabric.…”

Sequential Deposition of Polyaminothiophenols and Gold Nanoparticle on Wool Fabrics: Fabric Composites as Efficient Catalysts in the Reduction of Nitroarenes

“…Unlike the N1s spectrum of 3‐ATP/WSH, in the spectra of P3ATP‐modified fabrics, the C−N(H)−C and C=N + deconvoluted peaks were distinguished, with the relative abundance values of 12.6 % and 19.8 %, and 24.8 % and 13.9 % for P3ATP‐ g ‐WSH and P3ATP/WSH samples, respectively (Supporting Information Table 2S). The C=N + peak was correlated with the doped emeraldine salt‐like conjugated P3ATP structure in the literature [19] . Accordingly, considering this peak‘s higher relative abundance value in the P3ATP‐ g ‐WSH spectrum may indicate a higher doping level has been ensured in P3ATP chains through the grafting route.…”

“…The C=N + peak was correlated with the doped emeraldine salt-like conjugated P3ATP structure in the literature. [19] Accordingly, considering this peak's higher relative abundance value in the P3ATP-g-WSH spectrum may indicate a higher doping level has been ensured in P3ATP chains through the grafting route.…”

Gama-Fe2O3 silica-coated 2-(2-benzothiazolyl azo)-4-methoxyaniline for supercapacitive performance

“…The specific capacitance of prepared electrodes was also examined at different scan rates 10-100 mV s -1 and the results are also presented in Figure 8C. The results show a reduction in specific capacitance values with increasing scan rate because of difficult redox transition at high scan rate value [33,34].…”