Hydrothermal synthesis and electrochemical performance of GNPs-doped MgFe2O4 electrodes for supercapacitors

Mashrah, Muwafaq; Polat, Safa

doi:10.1016/j.ssi.2022.116107

Cited by 10 publications

(10 citation statements)

References 44 publications

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“…The intensities of these peaks are also influenced by ion adherence to the electrode surface and the scanning speed. Here, as the scanning speed increases, the intensities of these peaks are expected to increase in a linear direction as seen in previous studies [ 11 , 26 ]. This is confirmed to occur with a slope of 0.98942 in the anodic region and 0.99924 in the cathodic region in the Randel–Sevic plot of Figure 6 c. On the other hand, the determination of the charging mechanism of such electrodes is an important issue, which can be clarified from the CV graph.…”

Section: Resultssupporting

confidence: 65%

“…While GCD measurements were carried out at a current density of 1–32 mA cm −2 , CV measurements were conducted in the potential range of 0 to 0.45 V. Additionally, EIS measurements were made in the frequency range of 100 kHz to 0.1 Hz with a bias potential of 0 V and a signal amplitude of 10 mV AC. The specific capacitance (Cs) of the electrodes was computed by following the nonlinear discharge curves [ 26 ].

…”

Section: Methodsmentioning

confidence: 99%

“…In this equation, Cs is the area capacitance in millifarads (mF), I is the discharge current constant in milliamperes (mA), t is the discharge duration in seconds (s), V is the potential window in volts (V), and S is the surface area of the working electrode in square centimeters (cm 2 ). In addition, based on the information gathered from the Equation (1), the energy (E) and power (P) densities of the electrode were calculated using Equations (2) and (3) [ 26 ].

…”

Section: Methodsmentioning

confidence: 99%

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Sustainable Cauliflower-Patterned CuFe2O4 Electrode Production from Chalcopyrite for Supercapacitor Applications

2023

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The primary purpose of this study was to produce an ore-based high-capacity supercapacitor electrode. For this, chalcopyrite ore was first leached with nitric acid, and then metal oxide synthesis was carried out immediately on nickel foam using a hydrothermal technique from the solution. Cauliflower-patterned CuFe2O4 with a wall thickness of about 23 nm was synthesized on the Ni foam surface, characterized by XRD, FTIR, XPS, SEM, and TEM investigations. The produced electrode also displayed a feature of a battery-like charge storage mechanism with a specific capacity of 525 mF cm−2 at 2 mA cm−2 current density, energy of 8.9 mWh cm−2, and a power density of 233 mW cm−2. Additionally, even after 1350 cycles, this electrode still performed at 109% of its original capacity. The performance of this finding is 255% higher than that of the CuFe2O4 in our earlier investigation; despite being pure, it performs far better than some of its equivalents in the literature. Obtaining such performance from an electrode made from ore indicates that the use of ore has a lot of potential for supercapacitor production and property improvement.

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Section: Resultssupporting

confidence: 65%

…”

Section: Methodsmentioning

confidence: 99%

…”

Section: Methodsmentioning

confidence: 99%

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Sustainable Cauliflower-Patterned CuFe2O4 Electrode Production from Chalcopyrite for Supercapacitor Applications

2023

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“…3, the FTIR spectra of MFO-GM samples indicate several signals corresponding to oxygen-containing functional groups arising from the material surface. In particular, a strong peak located at 3400 cm −1 can be attributed to the vibration of the hydroxyl (−OH) functional group whereas other noticeable peaks are recognized at 1650, 1490, and 1200 cm −1 , which can be ascribed to the O−H bending vibration [32] . It is also noticeable that all MFO-GM materials provide a broad absorption signal at around 500 cm −1 resulting from the vibration of metal oxide bonds, namely Mg−O and Fe−O, thereby affirming the existence of magnesium and ferrite oxide nanoparticles within the composition [33] .…”

Section: Characterization Of Materialsmentioning

confidence: 99%

“…8, upon the addition of TiO 2 and rGO, the adsorption and photodegradation efficiencies of all MGTG samples were improved noticeably as compared to those of the pristine MFO-GM-600. This can be ascribed to the incorporation of TiO 2 and rGO, which prolongs the recombination rate of the photogenerated electron-hole pairs, thereby enhancing the photocatalytic potential of the material [32,47] . Additionally, with the introduction of a substrate such as rGO, the MFO and TiO 2 nanoparticles can be uniformly distributed and this reduces their agglomeration, which provides smaller particle sizes that can more efficaciously interact with CV molecules [48] .…”

Section: Photocatalytic Degradation Of CVmentioning

confidence: 99%

Green synthesis of three-dimensional magnesium ferrite/titanium dioxide/reduced graphene from Garcinia mangostana extract for crystal violet photodegradation and antibacterial activity

Lin,

Cong,

Nam

et al. 2023

J. Semicond.

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In this study, three-dimensional porous magnesium ferrite/titanium dioxide/reduced graphene oxide (MgFe2O4-GM/TiO2/rGO (MGTG)) was successfully synthesized via green and hydrothermal-supported co-precipitation methods using the extract of Garcinia mangostana (G. mangostana) as a reducing agent. The characterization results indicate the successful formation of the nano/micro MgFe2O4 (MFO) and TiO2 on the structure of the reduced graphene oxide (rGO), which can also act as efficient support, alleviating the agglomeration of the nano/micro MFO and TiO2. The synergic effects of the adsorption and photodegradation activity of the material were investigated according to the removal of crystal violet (CV) under ultraviolet light. The effects of catalyst dosage, CV concentration, and pH on the CV removal efficiency of the MGTG were also investigated. According to the results, the CV photodegradation of the MGTG-200 corresponded to the pseudo-first-order kinetic model. The reusability of the material after 10 cycles also showed a removal efficiency of 92%. This happened because the materials can easily be recollected using external magnets. In addition, according to the effects of different free radicals ·O2 −, h+, and ·OH on the photodegradation process, the photocatalysis mechanism of the MGTG was also thoroughly suggested. The antibacterial efficiency of the MGTG was also evaluated according to the inhibition of the Gram-positive bacteria strain Staphylococcus aureus (S. aureus). Concurrently, the antibacterial mechanism of the fabricated material was also proposed. These results confirm that the prepared material can be potentially employed in a wide range of applications, including wastewater treatment and antibacterial activity.

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Simultaneous optimization of production yield and sulfadiazine adsorption of MgFe2O4 loaded on prickly pear biochars using Box-Behnken design

Nguyen,

Tran,

Lam

et al. 2023

Environ Sci Pollut Res

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Hydrothermal synthesis and electrochemical performance of GNPs-doped MgFe2O4 electrodes for supercapacitors

Cited by 10 publications

References 44 publications

Sustainable Cauliflower-Patterned CuFe2O4 Electrode Production from Chalcopyrite for Supercapacitor Applications

Sustainable Cauliflower-Patterned CuFe2O4 Electrode Production from Chalcopyrite for Supercapacitor Applications

Green synthesis of three-dimensional magnesium ferrite/titanium dioxide/reduced graphene from Garcinia mangostana extract for crystal violet photodegradation and antibacterial activity

Simultaneous optimization of production yield and sulfadiazine adsorption of MgFe2O4 loaded on prickly pear biochars using Box-Behnken design

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