Facile and Scalable Fabrication of Highly Porous Co3O4 and α-Fe2O3 Nanosheets and Their Catalytic Properties

Sơn, Lê Lâm; Thi, Tran Thi Van; Trung, Khuc Quang; Hiếu, Nguyễn Văn; Trung, Do Dang; Cuong, Nguyen Duc

doi:10.1007/s11664-019-07616-6

Cited by 3 publications

(3 citation statements)

References 43 publications

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“…On the other hand, no absorption band of −COOH was seen in the FTIR spectrum of K3‐Fe 2 O 3 ‐rGO/CNT, confirming the successful removal of oxygen‐containing groups from graphene oxide after heat treatment. The absorption peaks at 436 cm −1 and 578 cm −1 are attributed to the stretching vibrations of Fe−O, which would confirm the successful fabrication of the K3‐Fe 2 O 3 ‐rGO/CNT composites [23] . The XRD patterns show that the diffraction peaks at 17.5°, 24.7°, 35.2°, 39.6°and 43.5° are assigned to the crystalline planes of (100), (110), (200), (210) and (211) for K3–PB, whichcould be indexed on the basis of a face‐centered cubic lattice (FCC)‐type structure(JCPDS No.…”

Section: Resultsmentioning

confidence: 52%

“…The absorption peaks at 436 cm À 1 and 578 cm À 1 are attributed to the stretching vibrations of FeÀ O, which would confirm the successful fabrication of the K3-Fe 2 O 3 -rGO/CNT composites. [23] The XRD patterns show that the diffraction peaks at 17.5°, 24.7°, 35.2°, 39.6°and 43.5°are assigned to the crystalline planes of (100), ( 110), ( 200), ( 210) and (211) for K3-PB, whichcould be indexed on the basis of a face-centered cubic lattice (FCC)-type structure(JCPDS No. 73-0687), demonstrating the successful preparation of high pure crystalline FeFe(CN) 6 without any detectable impurity phases (Figure 1h).…”

Section: Materials Characterizationmentioning

confidence: 99%

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Preparation ofa Fe₂O₃/Reduced Graphene Oxide/Carbon Nanotube Composite with Highly Dispersed Fe₂O₃Particles:Electrochemical Performance as an Anode of Lithium Ion Batteries

Xu,

Yang,

2024

ChemistrySelect

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In this paper, a series of iron oxide/reduced graphene oxide/carbon nanotube composites (K3‐Fe2O3‐rGO/CNT) with well‐dispersedFe2O3 particles are prepared by in situ reaction and then heat‐treatment, and its electrochemical and battery performancesare studied as the anode material of lithium‐ion batteries. The results show that the introduction of reduced graphene oxide/carbon nanotube (rGO/CNT) improves the electrochemical and battery performances of the prepared electrode material. In particular, the K3‐Fe2O3‐rGO/CNT (30 %) composite material has a reversible capacity of 1559 mAh g−1 after 100 charge/discharge cycles at 100 mA g−1. And its specific discharge capacityis 641.1, 639.7, 609.5, 578.6 and 543 mAh g−1at the current density of 100, 200, 500, 1000 and 2000 mA g−1, respectively,with 84.7 % of capacity retention even with a 10 times increase in current density. The research of charge storage indicates that the electrochemical process is a mixed control process of diffusion and capacitance. The improved electrochemical and battery performancesfor the composite electrode material can be attributed to the enhanced dispersion of the Fe2O3 and the enhanced conductive network provided by rGO/CNT composite carbon. It makes a promising way to prepare high performance of anode material for lithium‐ion battery.

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Section: Resultsmentioning

confidence: 52%

Section: Materials Characterizationmentioning

confidence: 99%

Preparation ofa Fe₂O₃/Reduced Graphene Oxide/Carbon Nanotube Composite with Highly Dispersed Fe₂O₃Particles:Electrochemical Performance as an Anode of Lithium Ion Batteries

Xu,

Yang,

2024

ChemistrySelect

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“…The bands centered at 576 and 972 cm -1 are attributed to the vibrations of ρ w (Co-OH) and δ(Co-OH), respectively. The broad band at 3488 cm -1 indicates the presence of water in the sample [16]. After the annealing process, the XRD pattern of the calcined sample shows that all peaks match well with the cubic spinel Co 3 O 4 phase (JCPDS card No.…”

Section: Gas Sensing Testingmentioning

confidence: 99%

A high-sensitivity hydrogen gas sensor based on Ag nanoparticle-decorated porous Co3O4 nanorods

Sinh,

Quang,

Phuong

et al. 2024

Vietnam J. Sci. Technol.

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In this report, Ag nanoparticle-decorated cobalt carbonate hydroxide microflowers were synthesized using a simple hydrothermal approach without using surfactants, which were used as precursors to prepare Ag nanoparticle-decorated porous Co3O4 nanorods through an annealing process. The porous Co3O4 nanorods were composed of small primary nanoparticles with a size of ~ 10 nm, and their surface was decorated with uniform Ag nanoparticles (~ 10 nm). Sensors based on the porous Co3O4 nanorods decorated with Ag nanoparticles have higher sensitivity and selectivity to H2 gas than other reduced gases, as well as rapid response-recovery times. The enhanced H2 sensing properties of the sample may be attributed to the excellent catalytic features of Ag nanoparticles and unique porous Co3O4 nanorods. The results demonstrated the potential of Ag nanoparticle-decorated porous Co3O4 nanorods as sensing materials for the detection of hydrogen gas at low temperatures.

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Highly porous Co-doped NiO nanorods: facile hydrothermal synthesis and electrocatalytic oxygen evolution properties

et al. 2021

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Highly porous 3d transition metal oxide nanostructures are opening up the exciting area of oxygen evolution reaction (OER) catalysts in alkaline medium thanks to their good thermal and chemical stability, excellent physiochemical properties, high specific surface area and abundant nanopores. In this paper, highly porous Co-doped NiO nanorods were successfully synthesized by a simple hydrothermal method. The porous rod-like nanostructures were preserved with the added cobalt dopant ranging from 1 to 5 at% but were broken into aggregated nanoparticles at higher concentrations of additional cobalt. The catalytic activity of Co-doped NiO nanostructures for OER in an alkaline medium was assayed. The 5%Co-NiO sample showed a drastically enhanced activity. This result could originate from the combination of advantageous characteristics of highly porous NiO nanorods such as large surface area and high porosity as well as the important role of Co dopant that could provide more catalytic active sites, leading to an enhanced catalytic activity of the nanocatalyst.

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Facile and Scalable Fabrication of Highly Porous Co3O4 and α-Fe2O3 Nanosheets and Their Catalytic Properties

Cited by 3 publications

References 43 publications

Preparation ofa Fe₂O₃/Reduced Graphene Oxide/Carbon Nanotube Composite with Highly Dispersed Fe₂O₃Particles:Electrochemical Performance as an Anode of Lithium Ion Batteries

Preparation ofa Fe₂O₃/Reduced Graphene Oxide/Carbon Nanotube Composite with Highly Dispersed Fe₂O₃Particles:Electrochemical Performance as an Anode of Lithium Ion Batteries

A high-sensitivity hydrogen gas sensor based on Ag nanoparticle-decorated porous Co3O4 nanorods

Highly porous Co-doped NiO nanorods: facile hydrothermal synthesis and electrocatalytic oxygen evolution properties

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Facile and Scalable Fabrication of Highly Porous Co3O4 and α-Fe2O3 Nanosheets and Their Catalytic Properties

Cited by 3 publications

References 43 publications

Preparation ofa Fe2O3/Reduced Graphene Oxide/Carbon Nanotube Composite with Highly Dispersed Fe2O3Particles:Electrochemical Performance as an Anode of Lithium Ion Batteries

Preparation ofa Fe2O3/Reduced Graphene Oxide/Carbon Nanotube Composite with Highly Dispersed Fe2O3Particles:Electrochemical Performance as an Anode of Lithium Ion Batteries

A high-sensitivity hydrogen gas sensor based on Ag nanoparticle-decorated porous Co3O4 nanorods

Highly porous Co-doped NiO nanorods: facile hydrothermal synthesis and electrocatalytic oxygen evolution properties

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Preparation ofa Fe₂O₃/Reduced Graphene Oxide/Carbon Nanotube Composite with Highly Dispersed Fe₂O₃Particles:Electrochemical Performance as an Anode of Lithium Ion Batteries

Preparation ofa Fe₂O₃/Reduced Graphene Oxide/Carbon Nanotube Composite with Highly Dispersed Fe₂O₃Particles:Electrochemical Performance as an Anode of Lithium Ion Batteries