Influence of calcination temperature on structural, morphological, and electrochemical properties of Zn2P2O7 nanostructure

Karaphun, Attaphol; Sawadsitang, Sasiphimol; Duangchuen, Thanawut; Chirawatkul, Prae; Putjuso, Thanin; Kumnorkaew, Pisist; Maensiri, Santi; Swatsitang, Ekaphan

doi:10.1016/j.surfin.2021.100961

Cited by 9 publications

(6 citation statements)

References 41 publications

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“…As seen in Fig. 8a, the Zn foil and ZnO (having oxidation states of 0 and + 2, respectively) show the maximum gradient of their spectra at different energy positions, 9659.0 and 9661.83 eV, respectively [36][37][38] . For our samples, all the spectra display their maximal gradients in the range of 9660.20-9661.67 eV, implying that the oxidation state of the Zn cation is + 2, in agreement with the work of Wiriya et al 37 .…”

Section: Resultsmentioning

confidence: 89%

“…Last, in the low frequency range, the observed slope of the straight-line portion of the curve reflects the Warburg resistance (Rw). This represents the ion diffusion process of redox material in the KOH electrolyte 6 , 38 . The increased slope in this frequency range indicates that the materials have become more purely capacitive 2 , 32 .…”

Section: Resultsmentioning

confidence: 99%

“…It is suggested that this might be due to more effective contact of the Co 0.3 Zn 0.7 Fe 2 O 4 electrode and KOH electrolyte. This promotes simultaneous faster ion/charge transport in the bulk of electrode and at the electrode/electrolyte interface to these achieve excellent properties 6,8,12,38 . Moreover, this electrode has a higher active area via a uniform distribution of nanosized particles that prevents particle agglomeration, as shown in the SEM, TEM, and BET results.…”

Section: Electrochemical Properties Studymentioning

confidence: 99%

“…12d display three regions, depending on the applied frequency 1,7 . Initially, the Z' axis intercept in the high frequency range represents the solution resistance (Rs) of the 3 M KOH electrolyte and working electrode interface 6,15,38,43 . The Rs value for each Co x Zn 1−x Fe 2 O 4 (x = 0.0, 0.1, 0.2, 0.3 and 0.4) NPs electrode was found to be 0.55, 0.67, 0.71, 0.68 and 0.82 Ω, respectively.…”

Section: Electrochemical Properties Studymentioning

confidence: 99%

“…The Rs value for each Co x Zn 1−x Fe 2 O 4 (x = 0.0, 0.1, 0.2, 0.3 and 0.4) NPs electrode was found to be 0.55, 0.67, 0.71, 0.68 and 0.82 Ω, respectively. However, the slight increase of Rs causes a reduction in the conductivity of the KOH electrolyte 6,38 . In the next frequency range, where semicircular loops are observed, the diameter of each semicircular loop is related to electron charge transfer resistance (Rct) at the electrode and electrolyte interface, resulting from the Faradaic redox process 6,38,43,44 .…”

Section: Electrochemical Properties Studymentioning

confidence: 99%

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Influence of Co doping on phase, structure and electrochemical properties of hydrothermally obtained CoxZn1−xFe2O4 (x = 0.0–0.4) nanoparticles

Putjuso

Karaphun

et al. 2023

Sci Rep

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In this work, CoxZn1−xFe2O4 (x = 0.0–0.4) nanoparticles (NPs) were successfully synthesized by a hydrothermal method at 200 °C for 12 h. X-ray diffraction revealed a pure cubic spinel phase of all samples with space group Fd-3m. Fourier transform infrared spectrometry disclosed the vibrational modes of metal oxides in the spinel structure. Scanning electron microscopy and transmission electron microscopy disclosed a uniform distribution of cuboidal shape NPs with a decreased average NPs size from 22.72 ± 0.62 to 20.85 ± 0.47 nm as the Co content increased. X-ray absorption near edge spectroscopy results confirmed the presence of Zn2+, Co2+ and Fe2+/Fe3+ in Co-doped samples. The pore volume, pore size and specific surface area were determined using N2 gas adsorption/desorption isotherms by the Brunauer–Emmett–Teller (BET) and Barrett–Joyner–Halenda (BJH) techniques. Electrochemical properties of supercapacitors, having active CoxZn1−xFe2O4 (x = 0.0–0.4) NPs as working electrodes, indicated pseudo-capacitor performance related to the Faradaic redox reaction. Interestingly, the highest specific capacitance (Csc), 855.33 F/g at 1 A/g, with a capacity retention of 90.41% after 1000 GCD cycle testing was achieved in the Co0.3Zn0.7Fe2O4 electrode.

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Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Electrochemical Properties Studymentioning

confidence: 99%

Section: Electrochemical Properties Studymentioning

confidence: 99%

Section: Electrochemical Properties Studymentioning

confidence: 99%

See 3 more Smart Citations

Influence of Co doping on phase, structure and electrochemical properties of hydrothermally obtained CoxZn1−xFe2O4 (x = 0.0–0.4) nanoparticles

Putjuso

Karaphun

et al. 2023

Sci Rep

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Optimization and Applications of Instrumental and Preconcentration Neutron Activation Analysis Methods for Rapid Determination of Selected REE by Utilizing their Short‐Lived Activation Products**

Samanta,

Sengupta,

Gupta

et al. 2024

ChemistrySelect

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Determination of Rare Earth Elements (REEs) using spectroscopic methods is challenging. Conventional Instrumental Neutron Activation Analysis (INAA) method utilizing Pneumatic Carrier Facility (PCF) of Dhruva research reactor has been optimized with the short‐lived isotopes such as 161Gd, 165mDy and 153/155Sm for quantification of Gd, Dy and Sm respectively. Such isotopes are difficult to observe by conventional INAA with longer cooling periods owing to their very short half‐lives (1–3 mins). In this work, such isotopes are not only observed but also utilized as activation product for rapid determination of these REEs. The standardized method has been utilized for the first time in liquid samples involving nuclear fuel like U3O8 wherein TBP/n‐dodecane has been applied for chemical separation of Uranium prior to analysis. The INAA method has also been applied for validating the stoichiometry of Gd in Gd3+ co‐doped Zn2P2O7:Tb3+ green emitting solid‐state phosphors, which plays a very pivotal role in sensitizing the terbium ion in its performance for solid state lighting. We believe with huge current demand of REEs in research, science and technology; INAA can be a game changer wherever needed for quantification with high precision and accuracy and can also be extended to other REEs of interest.

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Development of heterostructure-like Zn2P2O7/NF@PPybinder-free electrode for high-energy hybrid supercapacitor applications

Premkumar,

Radjarejesri,

Vadivel

et al. 2024

Ionics

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Influence of calcination temperature on structural, morphological, and electrochemical properties of Zn2P2O7 nanostructure

Cited by 9 publications

References 41 publications

Influence of Co doping on phase, structure and electrochemical properties of hydrothermally obtained CoxZn1−xFe2O4 (x = 0.0–0.4) nanoparticles

Influence of Co doping on phase, structure and electrochemical properties of hydrothermally obtained CoxZn1−xFe2O4 (x = 0.0–0.4) nanoparticles

Optimization and Applications of Instrumental and Preconcentration Neutron Activation Analysis Methods for Rapid Determination of Selected REE by Utilizing their Short‐Lived Activation Products**

Development of heterostructure-like Zn2P2O7/NF@PPybinder-free electrode for high-energy hybrid supercapacitor applications

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