Facile synthesis of hollow Fe2O3 nanotubes on nitrogen-doped graphene and their electrochemical performances

Cheng, Tao; Li, Weilong; Yu, Baozhi; He, Mi; Cao, Linli; Li, Xinghua; Zheng, Xinliang; Ren, Zhaoyu

doi:10.1007/s11581-017-2123-9

Cited by 8 publications

(2 citation statements)

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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 12 − 16 , 49 − 58 ( Table 3 ). 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: 71%

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: 71%

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

2020

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“…Hydro/solvothermal treatment can not only connect Fe 2 O 3 with graphene but also transform Fe‐precursors/graphene composites into Fe 2 O 3 /graphene composites. For instance, hollow Fe 2 O 3 nanotubes/N‐doped graphene was synthesized by Cheng et al (Figure a) . 20 mg of N‐doped graphene and 0.4 mmol of hollow Fe 2 O 3 nanotubes were dispersed in 40 mL DI water.…”

Section: Synthesis Of Binary Graphene/fe2o3 Compositesmentioning

confidence: 99%

Synthesis and Applications of Graphene/Iron(III) Oxide Composites

Guo

Yang

et al. 2019

ChemElectroChem

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Iron(III) oxide (Fe 2 O 3 ) has attracted great attention, owing to its abundant natural resources, environmental friendliness, and low cost. Nevertheless, this material possesses an inferior rate capability and a cycle stability that is similar to most transition metal oxides. Graphene, with a one-atom-thick 2D structure, possesses superior mechanical properties, electrical conductivity, and stability, and excellent electrical and electrochemical behaviors. The hierarchical structure of graphene/Fe 2 O 3 composites provides a porous conductive network, close contact between the graphene and Fe 2 O 3 , a stress buffer space for charge transport, and superior structural stability. This composite consists of high conductivity graphene with interconnected Fe 2 O 3 , thus exposing abundant active sites for redox reactions and providing sufficient contacts with the electrolyte. Consequently, materials composed of Fe 2 O 3 and graphene have been widely explored, owing to their outstanding synergistic effects. Graphene can effectively limit the volume expansion and agglomeration of Fe 2 O 3 , whereas Fe 2 O 3 can prevent the restacking of graphene at the same time. This article mainly discusses the preparation of Fe 2 O 3 /graphene materials and their applications, including supercapacitors, rechargeable batteries, catalysis, and so forth. In addition, the perspectives and challenges of Fe 2 O 3 /graphene materials for different applications are also discussed.

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Green synthesis of reduced graphene oxide as high-performance electrode materials for supercapacitors

Liu

Luo

Yan

et al. 2019

Ionics

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Facile synthesis of hollow Fe2O3 nanotubes on nitrogen-doped graphene and their electrochemical performances

Cited by 8 publications

References 31 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

Synthesis and Applications of Graphene/Iron(III) Oxide Composites

Green synthesis of reduced graphene oxide as high-performance electrode materials for supercapacitors

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Facile synthesis of hollow Fe2O3 nanotubes on nitrogen-doped graphene and their electrochemical performances

Cited by 8 publications

References 31 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

Synthesis and Applications of Graphene/Iron(III) Oxide Composites

Green synthesis of reduced graphene oxide as high-performance electrode materials for supercapacitors

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Product

Resources

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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