Multifunctional magnetic CoFe2O4 nanoparticles for the photocatalytic discoloration of aqueous methyl violet dye and energy storage applications

Vijayalakshmi, S.; Elaiyappillai, Elanthamilan; Johnson, Princy Merlin; Lydia, I. Sharmila

doi:10.1007/s10854-020-03624-z

Cited by 28 publications

(19 citation statements)

References 47 publications

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“…Compared with the pristine CoFe-LDH electrode, the optimized amount of PANI astonishingly upsurges the capacitance of the composite electrode by ≈49.4%. The CoFe-LDH/P2 electrode achieves a much broader potential window than all previously reported Co/Fe-based electrodes [47][48][49][50][51][52] and the highest specific capacitance among other electrodes due to the well-balanced amount of PANI and homogenous pores on the surface of CoFe-LDH. While the decreased performance of the CoFe-LDH/P3 is mainly due to the deprotonation effect of a high concentration of PANI in alkaline electrolyte.…”

Section: Discussionmentioning

confidence: 86%

Unprecedented Dual Role of Polyaniline for Enhanced Pseudocapacitance of Cobalt–Iron Layered Double Hydroxide

Mahmood

Zhao

Javed

et al. 2022

Macromol. Rapid Commun.

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Creating nanosized pores in layered materials can increase the abundant active surface area and boost potential applications of energy storage devices. Herein, a unique synthetic strategy based on polyaniline (PANI) doped 2D cobalt-iron layered double hydroxide (CoFe-LDH/P) nanomaterials are designed, and the formation of pores at low temperature (80 °C) is developed. It is found that the optimized concentration of PANI creates the nanopores on the CoFe-LDH nanosheets among all other polymers. The well-ordered pores of CoFe-LDH/P allow the high accessibility of the redox-active sites and promote effective ion diffusion. The optimized CoFe-LDH/P2 cathode reveals a specific capacitance 1686 (1096 Cg −1 ) and 1200 Fg −1 (720 Cg −1 ) at 1 and 30 Ag −1 respectively, a high rate capability (71.2%), and a long cycle life (98% over 10 000 cycles) for supercapacitor applications. Charge storage analysis suggests that the CoFe-LDH/P2 electrode displays a capacitive-type storage mechanism (69% capacitive at 1 mV s −1 ). Moreover, an asymmetric aqueous supercapacitor (CoFe-LDH/P2//AC) is fabricated, delivering excellent energy density (75.9 Wh kg −1 at 1124 W kg −1 ) with outstanding stability (97.5%) over 10 000 cycles. This work opens a new avenue for designing porous 2D materials at low temperature for aqueous energy storage devices.

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Section: Discussionmentioning

confidence: 86%

Unprecedented Dual Role of Polyaniline for Enhanced Pseudocapacitance of Cobalt–Iron Layered Double Hydroxide

Mahmood

Zhao

Javed

et al. 2022

Macromol. Rapid Commun.

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“…Furthermore, XRD pattern of the series of ZrW 2 O 8 NPs prepared under similar optimized conditions was given in Figure S2, which closely resemble with one another and no phase change was observed, which also indicated the reliability of the synthetic procedure. The average crystallite size of ZrW 2 O 8 NPs was obtained from Scherrer equation (Equation ) and it was found to be 42.7 nm 38

D = \frac{italicKλ}{β Cosθ}

where, D , K , λ , β , and θ indicate mean crystallite size, K ‐shape factor (0.94), wavelength of the X‐ray beam, Full Width at Half Maximum (FWHM), and Bragg’s angle respectively.…”

Section: Resultsmentioning

confidence: 99%

Facile synthesis of platelet‐like zirconium tungstate nanostructures for high‐performance supercapacitors

Elaiyappillai

Rajkumar

Wang

et al. 2022

Intl J of Energy Research

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Increasing demand for electronic devices has sparked quantum of research work on energy storage systems. In the present work, we report the facile synthesis of platelet-like Zirconium tungstate (ZrW 2 O 8 NPs) binary metal oxide via co-precipitation method. The ZrW 2 O 8 NPs was confirmed by several physicochemical techniques. Furthermore, FESEM images proved the platelet-like morphology of ZrW 2 O 8 NPs. The as-prepared ZrW 2 O 8 NPs was used as electrode material in the fabrication of supercapacitors. ZrW 2 O 8 NPs @ Ni foil shows the specific capacitance (C sp ) maximum of 508 F g À1 at 5 mV/s and showed 91.3% of cyclic stability after 4000 GCD cycles. As a result, ZrW 2 O 8 NPs was utilized as an anode electrode material to construct an asymmetric device, ZrW 2 O 8 NPs jj Activated carbon (AC). The as-fabricated device showed the energy density of 9.65 Wh kg À1 related to the power density of 299.48 W kg À1 . The effective supercapacitive behavior might be due to the unique morphological features, occurrence of multiple redox sites, and enhanced electrical conductivity of ZrW 2 O 8 NPs. Thus, all these findings account for the applicability of ZrW 2 O 8 NPs as electrode material in highperformance supercapacitors.

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“…Different mechanisms rely on the form of adsorption and type of contaminant available. There are toxins found in wastewater and the spinel ferrite nanoparticles/spinel ferrite nanoparticle composites are being used to handle wastewater treatment [52]. For more illustration, the ion-exchange process for Pb (II) adsorption on Co0.6 Fe2.4 O4 was found to be a significant adsorption mechanism.…”

Section: Adsorption Pathwaysmentioning

confidence: 99%

Spinel Ferrite Based Nanomaterials for Water Remediation Application

Jasrotia

2021

Materials Research Foundations

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The decreasing levels of consumable water on earth have been a serious issue and this issue makes the researchers and scientists develop new technologies for the purification of polluted water. Several reports have been carried on wastewater remediation by utilizing spinel ferrite-based nanoparticles and their composites. The spinel ferrites-based nanoparticles utilized for wastewater treatment was cost effective, chemically stable, easily retrieved and reusable. The present work addresses the various fabrication techniques for the preparation of spinel ferrite-based nanoparticles and their utilization for the removal of organic and inorganic pollutants through the adsorption paths.

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Multifunctional magnetic CoFe2O4 nanoparticles for the photocatalytic discoloration of aqueous methyl violet dye and energy storage applications

Cited by 28 publications

References 47 publications

Unprecedented Dual Role of Polyaniline for Enhanced Pseudocapacitance of Cobalt–Iron Layered Double Hydroxide

Unprecedented Dual Role of Polyaniline for Enhanced Pseudocapacitance of Cobalt–Iron Layered Double Hydroxide

Facile synthesis of platelet‐like zirconium tungstate nanostructures for high‐performance supercapacitors

Spinel Ferrite Based Nanomaterials for Water Remediation Application

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