Microwave assisted growth of stannous ferrite microcubes as electrodes for potentiometric nonenzymatic H 2 O 2 sensor and supercapacitor applications

Bindu, K; Sridharan, Kishore; Ajith, K M; Lim, Hong Ngee; Nagaraja, H.S.

doi:10.1016/j.electacta.2016.09.083

Cited by 60 publications

(2 citation statements)

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“…53 Highly porous, hierarchical morphology of mixed ferrites promotes fast mass transfer kinetics across their channels besides increasing the density as well as reactivity of exposed electrocatalytic active sites. 54,55 The above explorations reveal that further improved and prominent electrochemical behavior would be expected in porous microsphere morphology compared to densely packed mixed-ferrite nanoparticles. The observation that self-assembled ferrite microstructures often exhibit striking electrical, optical, magnetic, and catalytic properties compared to their nanoparticle counterparts, 52 thus, has inspired us to investigate the performance of Co 0.3 Zn 0.7 Fe 2 O 4 self-assembled microspheres as nonenzymatic H 2 O 2 sensors.…”

Section: Introductionmentioning

confidence: 96%

Magnetic, Pseudocapacitive, and H₂O₂-Electrosensing Properties of Self-Assembled Superparamagnetic Co_0.3Zn_0.7Fe₂O₄with Enhanced Saturation Magnetization

et al. 2019

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The present work explores the structural, microstructural, optical, magnetic, and hyperfine properties of Co 0.3 Zn 0.7 Fe 2 O 4 microspheres, which have been synthesized by a novel template-free solvothermal method. Powder X-ray diffraction, electron microscopic, and Fourier transform infrared spectroscopic techniques were employed to thoroughly investigate the structural and microstructural properties of Co 0.3 Zn 0.7 Fe 2 O 4 microspheres. The results revealed that the microspheres (average diameter ∼121 nm) have been formed by self-assembly of nanoparticles with an average particle size of ∼12 nm. UV–vis diffuse reflectance spectroscopic and photoluminescence studies have been performed to study the optical properties of the sample. The studies indicate that Co 0.3 Zn 0.7 Fe 2 O 4 microspheres exhibit a lower band gap value and enhanced PL intensity compared to their nanoparticle counterpart. The outcomes of dc magnetic measurement and Mössbauer spectroscopic study confirm that the sample is ferrimagnetic in nature. The values of saturation magnetization are 76 and 116 emu g –1 at 300 and 5 K, respectively, which are substantially larger than its nanosized counterpart. The infield Mössbauer spectroscopic study and Rietveld analysis of the PXRD pattern reveal that Fe 3+ ions have migrated from [B] to (A) sites resulting in the cation distribution: (Zn 2+ 0.46 Fe 3+ 0.54 ) A [Zn 2+ 0.24 Co 2+ 0.3 Fe 3+ 1.46 ] B O 4 . Comparison of electrochemical performance of the Co 0.3 Zn 0.7 Fe 2 O 4 microspheres to that of the Co 0.3 Zn 0.7 Fe 2 O 4 nanoparticles reveals that the former displays greater specific capacitance (149.13 F g –1 ) than the latter (80.06 F g –1 ) due to its self-assembled porous structure. Moreover, it was found that Co 0.3 Zn 0.7 Fe 2 O 4 microspheres possess a better electrochemical response toward H 2 O 2 sensing than Co 0.3 Zn 0.7 Fe 2 O 4 nanoparticles in a wide linear range.

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Section: Introductionmentioning

confidence: 96%

Magnetic, Pseudocapacitive, and H₂O₂-Electrosensing Properties of Self-Assembled Superparamagnetic Co_0.3Zn_0.7Fe₂O₄with Enhanced Saturation Magnetization

et al. 2019

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“…Additionally, the binary and ternary metal oxides have been proven to be electrochemically active with higher redox property and electrical conductivity than pure metal oxides because certain single metal oxides have limited conductivity and poor cyclic performance due to their aggregation after a certain number of cycles . Recently, researchers have focused on magnetic materials such as metal ferrites (MFe 2 O 4 ; here, M = Mn, Co, Ni, Zn, Sn, and Cu) as promising electrode materials. ,− However, the perovskite metal oxide shows good electrochemical performance and is cost effective. The general formula of perovskite metal oxide is ABO 3 , where the A site is filled with rare earth metals like La, Sm, Sr., Ce, Nd, Gd, Pr, Tb, Y, and other metallic elements of Bi and the B site is filled by transition metals like Fe, Co, Cr, Mn, Ni, and Ti of different oxidation states.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Cyclic Stability of Cobalt Doped Bi₂₅FeO₄₀/BiFeO₃ as an Electrode Material for a Super Long Life Symmetric Supercapacitor Device

Selvaraj¹,

Hemalatha²,

Nallathambi

et al. 2023

Energy Fuels

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BiFeO3/Bi25FeO40 and cobalt doped Bi25FeO40/BiFeO3 are synthesized by a cost-efficient hydrothermal technique. Cobalt is doped at four different concentrations of 1.5, 2.5, 3.5, and 4.5 mmol in a bismuth ferrite composite (BFCO1, BFCO2, BFCO3, and BFCO4). The capacitive behavior of BFCO3 is significantly higher than those of BFO, BFCO1, BFCO2, and BFCO4 based on their structure, morphology, and electrochemical properties. XRD confirmed the formation of a rhombohedral structure of BiFeO3 and cubic crystal structure of Bi25FeO40 and cobalt doped Bi25FeO40/BiFeO3 composites. Raman modes confirm the presence of cobalt doped Bi25FeO40/BiFeO3 in BFCO3. Microsized particles of BFCO1 were broken upon increasing the concentration of cobalt ion in BFCO2, BFCO3, and BFCO4. In BFCO3, the length of the needle is 0.45 μm and breadth is 0.06 μm, which spread over the spherical-shaped particles with an average size of 0.43 μm. The surface area and average pore diameter of BFCO3 are 60.25 m2/g and 3.38 nm, which are relatively higher than the surface area and average pore diameter of BFO, BFCO1, BFCO2, and BFCO4. The capacitive behavior of BFCO3 shows a significantly higher specific capacitance of 605.16 F g–1 at a current density of 1 A g–1 under 3 M KOH as electrolyte in a three-electrode configuration. The symmetric device of BFCO3 exhibits higher specific capacitance of 176.87 F g–1, specific energy of 35.36 Wh kg–1, and specific power of 1199.43 W kg–1 at a current density of 0.5 A g–1 with super long cyclic stability of about 87% capacity retention, and the coulombic efficiency is about 96% even after 10,000 cycles.

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Simultaneous Detection of Paracetamol, Ascorbic Acid, and Caffeine Using a Bismuth–Silver Nanosensor

et al. 2020

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The bimetallic nanoparticles of bismuth-silver were used to modify a disk GCE for the simultaneous electrochemical analysis of caffeine (CAF), ascorbic acid (AA), and paracetamol (PAR). The constructed Bi-AgNPs/GCE illustrated strong electrocatalytic activity towards the oxidation of CAF, PAR, and AA. Under the optimum conditions, the sensor provided linearity for PAR, AA, CAF between 2 to 20 μΜ, 10 to 70 μM, and 2 to 40 μM (n = 3), respectively. The detection limits for CAF, PAR, and AA was 2.36 μM, 0.155 μM, and 0.697 μM, respectively. The GCE/Bi-AgNPs sensor presented good sensitivity and selectivity for the simultaneous electrochemical analysis of CAF, PAR, and AA.

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Microwave assisted growth of stannous ferrite microcubes as electrodes for potentiometric nonenzymatic H 2 O 2 sensor and supercapacitor applications

Cited by 60 publications

References 59 publications

Magnetic, Pseudocapacitive, and H₂O₂-Electrosensing Properties of Self-Assembled Superparamagnetic Co_0.3Zn_0.7Fe₂O₄with Enhanced Saturation Magnetization

Magnetic, Pseudocapacitive, and H₂O₂-Electrosensing Properties of Self-Assembled Superparamagnetic Co_0.3Zn_0.7Fe₂O₄with Enhanced Saturation Magnetization

Enhanced Cyclic Stability of Cobalt Doped Bi₂₅FeO₄₀/BiFeO₃ as an Electrode Material for a Super Long Life Symmetric Supercapacitor Device

Simultaneous Detection of Paracetamol, Ascorbic Acid, and Caffeine Using a Bismuth–Silver Nanosensor

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Microwave assisted growth of stannous ferrite microcubes as electrodes for potentiometric nonenzymatic H 2 O 2 sensor and supercapacitor applications

Cited by 60 publications

References 59 publications

Magnetic, Pseudocapacitive, and H2O2-Electrosensing Properties of Self-Assembled Superparamagnetic Co0.3Zn0.7Fe2O4with Enhanced Saturation Magnetization

Magnetic, Pseudocapacitive, and H2O2-Electrosensing Properties of Self-Assembled Superparamagnetic Co0.3Zn0.7Fe2O4with Enhanced Saturation Magnetization

Enhanced Cyclic Stability of Cobalt Doped Bi25FeO40/BiFeO3 as an Electrode Material for a Super Long Life Symmetric Supercapacitor Device

Simultaneous Detection of Paracetamol, Ascorbic Acid, and Caffeine Using a Bismuth–Silver Nanosensor

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Product

Resources

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Magnetic, Pseudocapacitive, and H₂O₂-Electrosensing Properties of Self-Assembled Superparamagnetic Co_0.3Zn_0.7Fe₂O₄with Enhanced Saturation Magnetization

Magnetic, Pseudocapacitive, and H₂O₂-Electrosensing Properties of Self-Assembled Superparamagnetic Co_0.3Zn_0.7Fe₂O₄with Enhanced Saturation Magnetization

Enhanced Cyclic Stability of Cobalt Doped Bi₂₅FeO₄₀/BiFeO₃ as an Electrode Material for a Super Long Life Symmetric Supercapacitor Device