Electrochemical supercapacitive performance of Hematite α-Fe2O3 thin films prepared by spray pyrolysis from non-aqueous medium

Yadav, Abhijit A.; Deshmukh, Tushar B.; Deshmukh, Rahul; Patil, Dewyani; Chavan, U.J.

doi:10.1016/j.tsf.2016.08.062

Cited by 40 publications

(16 citation statements)

References 43 publications

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“…This decrement in the capacity at high current densities is likely due to a high IR drop and a slow rate of the α-Fe 2 O 3 nanoleaves’ redox reaction. However, the observed specific capacity of α-Fe 2 O 3 @MPC-chit nanocomposites is quite better than that of the previously reported Fe 2 O 3 based electrodes − ,− (Table ). The high specific capacitance of the α-Fe 2 O 3 @MPC-chit composite is mainly attributed to the rational combination of the electrical double-layer capacitance of MPC-chit with the faradic capacitance of Fe 2 O 3 nanoleaves.…”

Section: Results and Discussioncontrasting

confidence: 64%

Mesoporous Carbon/α-Fe₂O₃ Nanoleaf Composites for Disposable Nitrite Sensors and Energy Storage Applications

2020

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In this work, we report a novel hydrothermal synthesis of α-Fe 2 O 3 nanoleaf-incorporated mesoporous carbon-chitosan (α-Fe 2 O 3 @MPC-chit) as a versatile disposable sensor for selective electrochemical detection of nitrite and for supercapacitor applications. The newly synthesized α-Fe 2 O 3 @MPC-chit nanocomposite was characterized by scanning electron microscopy, X-ray diffraction, Fourier transform-infrared spectroscopy, UV, and Raman spectroscopy. The extensive physicochemical characterization reveals the strong immobilization of α-Fe 2 O 3 nanoleaves within the MPC-chit composite. The electrochemical characterization with cyclic voltammetry and impedance spectroscopy using [Fe(CN) 6 )] 3–/4– as a redox probe concludes good electron conductivity and efficient electron transfer behavior of α-Fe 2 O 3 @MPC-chit. The α-Fe 2 O 3 @MPC-chit modified electrode exhibits excellent electrocatalytic activity toward nitrite oxidation. The amperometric method of nitrite detection showed a linear range of up to 200 μmol L –1 . The current sensitivity and detection limit were found to be 0.913 μA μM –1 and 31 nM cm –2 , respectively. The improved catalytic activity of the proposed electrode was endorsed by the synergistic effect of α-Fe 2 O 3 with the MPC-chit composite. The ability of the proposed electrode was demonstrated by the successful detection of nitrite present in tap water, river water, and industrial samples with extensive recovery values. Furthermore, the α-Fe 2 O 3 @MPC-chit modified stainless-steel electrode showed high-performance supercapacitor application and exhibited a large specific capacitance of 380 F g –1 at 1 A g –1 .

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Section: Results and Discussioncontrasting

confidence: 64%

Mesoporous Carbon/α-Fe₂O₃ Nanoleaf Composites for Disposable Nitrite Sensors and Energy Storage Applications

2020

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“…40 Through the in-depth study of the negative materials, researchers found that some negative materials with high electrochemical performance and a suitable anode voltage window could be used as an alternative to carbon-based materials. For instance, Chavan et al reported Hematite α-Fe 2 O 3 thin films by spray pyrolysis from a non-aqueous medium, showing a specific capacitance of 451 F g −1 at 5 mV s −1 with a potential window ranging from −1.1 to 0.2 V. 41 Han et al prepared Bi 2 O 3 microrods with a carbon coat (Bi 2 O 3 @C) by a facile metalorganic framework (MOF)-derived strategy, which exhibited a high specific capacity of 1378 C g −1 at 0.5 A g −1 and excellent cycle life (93% after 4000 cycles). 42 Despite these achievements, these metal compounds usually suffer from unsatisfactory rate capability, low electronic conductivity or inferior stability, leading to the unsatisfactory electrochemical performance.…”

Section: Introductionsmentioning

confidence: 99%

A self-templating scheme for the synthesis of NiCo₂Se₄ and BiSe hollow microspheres for high-energy density asymmetric supercapacitors

et al. 2022

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“…Commonly studied iron-based nanomaterials include magnetite (Fe 3 O 4 ) [29], goethite(α-FeOOH) [30], and hematite(Fe 2 O 3 ) [31][32][33]. Among those, hematite nanoparticles have been investigated for a range of applications, including adsorption [18,[34][35][36][37], water splitting [38,39], photochemical [40,41], catalytic [40,42], and electrochemical [43,44] processes.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Hematite Nanodiscs from Natural Laterites and Investigating Their Adsorption Capability of Removing Ni2+ and Cd2+ Ions from Aqueous Solutions

et al. 2020

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In this work, disc-like hematite (Fe2O3) nanoparticles were prepared using a readily available inexpensive earth material, ferruginous laterite, via a low-cost synthesis route. Prepared hematite nanoparticles were characterized using X-Ray diffraction (XRD), inductively coupled plasma mass spectroscopy (ICP-MS), particle size analyzer (PSA), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), and nitrogen adsorption-desorption analyzer. The performance of hematite nanoparticles was evaluated as a heavy metal ion adsorbent. Batch adsorption experiments were conducted to study the adsorption behaviour of Ni2+ and Cd2+ ions as a function of the amount of adsorbent, contact time, and pH. Adsorption data fitted to the linearized Langmuir and Freundlich kinetic models were compared and discussed. The correlation coefficient (R2) was used to determine the best fit kinetic model. Our data fitted the Langmuir kinetic model well and the highest adsorption efficiencies were found to be 62.5 mg/g for Ni2+ and 200 mg/g for Cd2+, respectively. Due to high surface area, pore volume with active sites, and sorption capabilities, hematite nanoparticles can be used as efficient and economical nano-adsorbents for the removal of Ni2+ and Cd2+ ions from industrial wastewater.

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Electrochemical supercapacitive performance of Hematite α-Fe2O3 thin films prepared by spray pyrolysis from non-aqueous medium

Cited by 40 publications

References 43 publications

Mesoporous Carbon/α-Fe₂O₃ Nanoleaf Composites for Disposable Nitrite Sensors and Energy Storage Applications

Mesoporous Carbon/α-Fe₂O₃ Nanoleaf Composites for Disposable Nitrite Sensors and Energy Storage Applications

A self-templating scheme for the synthesis of NiCo₂Se₄ and BiSe hollow microspheres for high-energy density asymmetric supercapacitors

Synthesis of Hematite Nanodiscs from Natural Laterites and Investigating Their Adsorption Capability of Removing Ni2+ and Cd2+ Ions from Aqueous Solutions

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Electrochemical supercapacitive performance of Hematite α-Fe2O3 thin films prepared by spray pyrolysis from non-aqueous medium

Cited by 40 publications

References 43 publications

Mesoporous Carbon/α-Fe2O3 Nanoleaf Composites for Disposable Nitrite Sensors and Energy Storage Applications

Mesoporous Carbon/α-Fe2O3 Nanoleaf Composites for Disposable Nitrite Sensors and Energy Storage Applications

A self-templating scheme for the synthesis of NiCo2Se4 and BiSe hollow microspheres for high-energy density asymmetric supercapacitors

Synthesis of Hematite Nanodiscs from Natural Laterites and Investigating Their Adsorption Capability of Removing Ni2+ and Cd2+ Ions from Aqueous Solutions

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Product

Resources

About

Mesoporous Carbon/α-Fe₂O₃ Nanoleaf Composites for Disposable Nitrite Sensors and Energy Storage Applications

Mesoporous Carbon/α-Fe₂O₃ Nanoleaf Composites for Disposable Nitrite Sensors and Energy Storage Applications

A self-templating scheme for the synthesis of NiCo₂Se₄ and BiSe hollow microspheres for high-energy density asymmetric supercapacitors