Investigation of chemical bonding and electronic network of rGO/PANI/PVA electrospun nanofiber

Singh, W. Ishwarchand; Sinha, Sayantan; Devi, Naorem Aruna; Nongthombam, Sumitra; Laha, Soumyadeep; Swain, Bibhu P.

doi:10.1007/s00289-020-03442-7

Cited by 40 publications

(6 citation statements)

References 39 publications

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“…The HRTEM image (Figure b) reveals no visible lattice fringes, illustrating the amorphous structure of NiCo x S y . As shown in Figure c, the broad band around 25.5° in all three PANI@GF, CoNi pre-PANI@GF, and NiCo x S y -PANI@GF correspond to the (200) planes of PANI . There were no other peaks observed in the XRD spectra, indicating that the NiCo x S y nanosheets were amorphous structures.…”

Section: Resultsmentioning

confidence: 89%

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Scalable NiCo_xS_y-PANI@GF Membranes with Broadband Light Absorption and High Salt-Resistance for Efficient Solar-Driven Interfacial Evaporation

Ying

Zhu

Huang

et al. 2021

ACS Appl. Energy Mater.

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Solar-driven interfacial evaporation has been considered a promising approach to solve clean water scarcity with minimum environmental impact. Herein, we rationally developed a flexible, floating, and high-efficiency solar-driven interfacial water evaporation device by designing a hierarchical structure (NiCo x S y -PANI@GF) in which numerous NiCo x S y nanosheets were vertically and densely grown on a polyaniline (PANI)-modified glass fiber (GF) membrane. The NiCo x S y -PANI@GF with honeycomb-like structures and rough surfaces could produce multiscattering of incident solar light and convert it into heat at the air–water interface. Simultaneously, the hydrophilic NiCo x S y -PANI@GF modified by PANI coating could provide continuous and rapid water supply via the capillary wicking effect. The GF substrate with low thermal conductivity thermally localizes solar heating at the air–water interface by suppressing underline heat loss. The NiCo x S y -PANI@GF achieves a broad-spectrum light absorption rate of 96%, an evaporation rate of 1.30 kg m–2 h–1, and a solar-to-steam efficiency of 78.7% under one solar irradiation. In practical desalination, the homemade devices afford continuous stable operation over 20 h and 15 evaporation cycles. Meanwhile, the excellent hydrophilicity ensures the high salt-resistance ability and excellent self-cleaning performance. Additionally, the high stability and scalability in harsh conditions make the NiCo x S y -PANI@GF competitive for practical full-spectrum and large-scale solar energy harvesting.

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Section: Resultsmentioning

confidence: 89%

“…As shown in Figure 2c, the broad band around 25.5°in all three PANI@GF, CoNi pre-PANI@GF, and NiCo x S y -PANI@GF correspond to the (200) planes of PANI. 34 There were no other peaks observed in the XRD spectra, indicating that the NiCo x S y nanosheets were amorphous structures. The obtained XPS spectra in Figure S4 .…”

Section: ■ Results and Discussionmentioning

confidence: 95%

Scalable NiCo_xS_y-PANI@GF Membranes with Broadband Light Absorption and High Salt-Resistance for Efficient Solar-Driven Interfacial Evaporation

Ying

Zhu

Huang

et al. 2021

ACS Appl. Energy Mater.

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“…It is seen that the two bands near 954 cm −1 and 844 cm −1 are corresponding to CH 2 rocking mode, C‐C stretching vibrations. Apart from this, the observed band is responsible for the C‐C symmetric stretching 52,53 . The C‐O stretching or C‐N stretching and CH 2 wagging were observed at 1088 and 1260 cm −1 ; the shifts in the peak position are due to the doping of BaTiO 3 fillers.…”

Section: Resultsmentioning

confidence: 90%

High performance of the sodium‐ion conducting flexible polymer blend composite electrolytes for electrochemical double‐layer supercapacitor applications

et al. 2022

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Herein, we present the synthesis of a nanocomposite blend of polyvinyl alcohol (PVA), polyethylene glycol (PEG), sodium nitrate (NaNO3), and various weight percent of nanofillers, BaTiO3, using a simple standard solution casting technique. The prepared nanocomposites are characterized in detail via techniques such as X‐ray diffraction technique, field‐emission scanning microscope, FTIR, and Raman spectra for confirming the crystal structure, morphology, and chemical bond formation within the samples, respectively. The suitable ionic conductivity of prepared samples is in the range of 10−4–10−8 S/cm at room temperature. Further, its maximum electrochemical stability window is ~4.1 V, and the ionic transference number is about 0.96 (15 wt%) at room temperature. The results associated with the optimized polymer nanocomposite motivated us to check its practical applicability for supercapacitors. The cyclic voltammetry of the fabricated cell based on optimized polymer as separator cum electrolyte appears as a distorted rectangle with no redox peaks. The cell charge storage mechanism is explored to be the electric double layer (EDLC) in nature. The maximum specific capacitance exhibited by the cell is nearly 4.4 F/g at a scan rate of 3 mV/s. The energy and power densities delivered by the same cell are equal to 27.7 W h kg−1 and 9972 W kg−1, respectively, which sustain for 100 cycles. The results of the designed cell reveal that both blend polymer composite electrolyte films and the composite electrode can be implemented to be used for EDLC supercapacitor.

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“…440 nm, which could be assigned to the polaron–π* transition of PANI, suggesting that the imine nitrogen was protonated by the carboxylic acids present and effectively anchored onto the surface of rGO sheets due to the conversion of these segments into poly(semiquinone) cation-radicals [ 22 , 52 , 53 , 54 ]. The values of energy band gaps were estimated using the Tauc plot method, resulting in 3.2 eV and 3.1 eV for PANI and rGO-PANI, respectively, which could be attributed to the presence of defects from rGO and higher conductivity [ 55 , 56 ].…”

Section: Resultsmentioning

confidence: 99%

NH3 Sensor Based on rGO-PANI Composite with Improved Sensitivity

Hadano

Gavim

Stefanelo

et al. 2021

Sensors

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This work reports on a reduced graphene oxide and poly(aniline) composite (rGO-PANI), with rGO clusters inserted between PANI chains. These clusters were formed due the plasticizing effect of N-methyl-2-pyrrolidone (NMP) solvent, which was added during the synthesis. Further, this composite was processed as thin film onto an interdigitated electrode array and used as the sensitive layer for ammonia gas, presenting sensitivity of 250% at 100 ppm, a response time of 97 s, and a lowest detection limit of 5 ppm. The PANI deprotonation process, upon exposure to NH3, rGO, also contributed by improving the sensitivity due its higher surface area and the presence of carboxylic acids. This allowed for the interaction between the hydrogen of NH3 (nucleophilic character) and the -COOH groups (electrophilic character) from the rGO surface, thereby introducing a promising sensing composite for amine-based gases.

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Investigation of chemical bonding and electronic network of rGO/PANI/PVA electrospun nanofiber

Cited by 40 publications

References 39 publications

Scalable NiCo_xS_y-PANI@GF Membranes with Broadband Light Absorption and High Salt-Resistance for Efficient Solar-Driven Interfacial Evaporation

Scalable NiCo_xS_y-PANI@GF Membranes with Broadband Light Absorption and High Salt-Resistance for Efficient Solar-Driven Interfacial Evaporation

High performance of the sodium‐ion conducting flexible polymer blend composite electrolytes for electrochemical double‐layer supercapacitor applications

NH3 Sensor Based on rGO-PANI Composite with Improved Sensitivity

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Investigation of chemical bonding and electronic network of rGO/PANI/PVA electrospun nanofiber

Cited by 40 publications

References 39 publications

Scalable NiCoxSy-PANI@GF Membranes with Broadband Light Absorption and High Salt-Resistance for Efficient Solar-Driven Interfacial Evaporation

Scalable NiCoxSy-PANI@GF Membranes with Broadband Light Absorption and High Salt-Resistance for Efficient Solar-Driven Interfacial Evaporation

High performance of the sodium‐ion conducting flexible polymer blend composite electrolytes for electrochemical double‐layer supercapacitor applications

NH3 Sensor Based on rGO-PANI Composite with Improved Sensitivity

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Scalable NiCo_xS_y-PANI@GF Membranes with Broadband Light Absorption and High Salt-Resistance for Efficient Solar-Driven Interfacial Evaporation

Scalable NiCo_xS_y-PANI@GF Membranes with Broadband Light Absorption and High Salt-Resistance for Efficient Solar-Driven Interfacial Evaporation