Abstract:Polypyrrole/porphyrin nanohybrid (PPy/Tpp(OH) 4 nanohybrid) have been synthesized through a self-assembled approach, and the as-synthesized PPy/Tpp(OH) 4 nanohybrid are characterized by Fourier-transform infrared, X-ray photoelectron spectroscopy, Raman spectroscopy, thermogravimetric analysis, Ultraviolet-visible absorption, scanning electron microscopy, and steady state fluorescence spectroscopic techniques. Formation of the PPy/Tpp(OH) 4 nanohybrid dramatically improved the solubility and processability of … Show more
“…The obvious N1s spectra have appeared only in PPY-coated fabric with N-H (401.1 eV) and C-N-C (399.8 eV) bonds. N1s spectra of PPY-coated confirm the well deposited PPY to the fabric surface [39] , [40] , [36] , [41] . Fig.…”
Highlights
Synthesis of polypyrrole from pyrrole involves only carbon dots as the catalyst.
PPY particles are optimally deposited on fluorinated nonwoven fabric by ultrasonication after 30 min.
With enhanced hydrophilicity, the resulting membrane can separate oil from a mixture of oil–water within 30 s with good reusability and efficiency.
The incorporation of PPY in the fluorinated nonwoven membrane also imparts superior antibacterial properties against
E. coli
(Gram-negative) and
S. aureus
(Gram-positive).
“…The obvious N1s spectra have appeared only in PPY-coated fabric with N-H (401.1 eV) and C-N-C (399.8 eV) bonds. N1s spectra of PPY-coated confirm the well deposited PPY to the fabric surface [39] , [40] , [36] , [41] . Fig.…”
Highlights
Synthesis of polypyrrole from pyrrole involves only carbon dots as the catalyst.
PPY particles are optimally deposited on fluorinated nonwoven fabric by ultrasonication after 30 min.
With enhanced hydrophilicity, the resulting membrane can separate oil from a mixture of oil–water within 30 s with good reusability and efficiency.
The incorporation of PPY in the fluorinated nonwoven membrane also imparts superior antibacterial properties against
E. coli
(Gram-negative) and
S. aureus
(Gram-positive).
“…The Raman spectrum of PPy/ASA (0.02) exhibits two principal spectral bands of interest, observed at Raman shift of 1568 cm −1 (G band) and 1337 cm −1 (D band), respectively. Compared between the observed D and G bands for PPy and ASA doped PPy, the blue‐shift of the D band and the G band for PPy/ASA (0.02), may result from the electron transfer process from ASA to PPy 64 …”
Section: Resultsmentioning
confidence: 86%
“…Compared between the observed D and G bands for PPy and ASA doped PPy, the blue-shift of the D band and the G band for PPy/ASA (0.02), may result from the electron transfer process from ASA to PPy. 64 Transmission electron micrographs of PPy and PPy/ASA were shown in Figure 6. From the TEM image F I G U R E 5 Raman spectra of the polypyrrole (PPy) (black line) and PPy/ASA(002) (red line) of PPy (Figure 6A), the morphology of intact PPy was observed to be a spherical shape.…”
Summary
In this study, excellent performance and wide operating voltage are obtained with an aqueous electrolyte. Aqueous electrolytes are attracted more attention than other electrolytes (such as organic solvents, ionic liquids) in supercapacitor applications because of their safety, low cost, nontoxicity. Polypyrrole (PPy), aniline 2‐sulfonic acid (ASA) modified electrodes are hydrothermal synthesized on carbon felt (CFt) for supercapacitor applications. We investigate the presence of the concentration of ASA on the polymerization of the PPy. Furthermore, a high operating voltage of 3.0 V asymmetric supercapacitor (ASC) with graphite plate is assembled 3 M KCI. CFt/PPy/ASA(0.02)//GP exhibits a high specific capacitance value of 902.9 F g−1 at 5 mV s−1 and after 5000 cycle‐life testing 93.6% capacitance retention at a scan rate of 1000 mV s−1. The assembled ASC has an ultrahigh‐energy density of 1005 Wh kg−1 while delivering a power density of 3000 W kg−1 at a current density of 2 A g−1. The effect of ASA concentration on the supercapacitor performance has been observed.
“…This corroborates our estimate of 3 nm for SnO 2 QDs determined from the Scherrer formula of PXRD data. The intense double peaks at 1571 and 1349 cm –1 are accredited to the CC backbone stretching and C–C ring stretching of PPy, respectively. − Additionally, the two weak peaks due to ring deformation modes in quinoid bipolaronic and polaronic forms are observed at 960 and 925 cm –1 , respectively …”
SnO 2 is an excellent candidate for replacement of conventional graphite-based anodes in lithium-ion batteries. It offers four times the specific capacity of carbon and a low working potential of ∼0.6 V vs Li + /Li but suffers from large capacity fade due to a drastic volume change (∼300%) upon cycling. A unique design of SnO 2 quantum dots (QDs) dispersed over flexible and conducting polypyrrole (PPy) is vital for achieving a high rate capability and long cycle life. This specially designed SnO 2 QDs@ PPy anode delivers excellent cycle performance with discharge capacities of 1252, 723, 474, 298, and 152 mAh g −1 at discharge rates of 0.35, 0.7, 1, 1.8, and 3.5 A g −1 . Upon long cycling at an elevated current density of 2 A g −1 , the anode demonstrated an initial discharge capacity of 572 mAh g −1 , while retaining 399 mAh g −1 at the 1360th cycle with a very low capacity decay of 0.022% per cycle. The superior mechanical stability and conductivity of the specially designed composite may be the reason behind very high cycle stability.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
