Controlled pyrolysis of MIL-88A to Fe<sub>2</sub>O<sub>3</sub>@C nanocomposites with varied morphologies and phases for advanced lithium storage

Wang, Yang; Guo, Xingmei; Wang, Zhenkang; Lü, Minfeng; Wu, Bin; Wang, Yue; Yan, Chao; Yuan, Aihua; Yang, Hongxun

doi:10.1039/c7ta08314a

Cited by 152 publications

(73 citation statements)

References 72 publications

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“…It is shown that the peaks at 711.6 and 725.2 eV correspond to Fe 2p 3/2 and Fe 2p 1/2 in the Fe 2p spectrum, respectively. The binding energy difference is 13.6 eV which is consistent with the trivalent oxidation state of Fe [26]. The C 1s spectrum of Fe 2 O 3 /C (Fig.…”

Section: Resultssupporting

confidence: 55%

Preparation and Electrochemical Properties of Pomegranate-Shaped Fe2O3/C Anodes for Li-ion Batteries

et al. 2018

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Due to the severe volume expansion and poor cycle stability, transition metal oxide anode is still not meeting the commercial utilization. We herein demonstrate the synthetic method of core-shell pomegranate-shaped Fe2O3/C nano-composite via one-step hydrothermal process for the first time. The electrochemical performances were measured as anode material for Li-ion batteries. It exhibits excellent cycling performance, which sustains 705 mAh g−1 reversible capacities after 100 cycles at 100 mA g−1. The anodes also showed good rate stability with discharge capacities of 480 mAh g−1 when cycling at a rate of 2000 mA g−1. The excellent Li storage properties can be attributed to the unique core-shell pomegranate structure, which can not only ensure good electrical conductivity for active Fe2O3, but also accommodate huge volume change during cycles as well as facilitate the fast diffusion of Li ion.

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Section: Resultssupporting

confidence: 55%

Preparation and Electrochemical Properties of Pomegranate-Shaped Fe2O3/C Anodes for Li-ion Batteries

et al. 2018

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“…33‐0664) and γ‐Fe 2 O 3 (JCPDS card No. 39‐1346) (Figure S2) . The intensity of the XRD peak at 16–28° increased relative to that of Fe 2 O 3 (Figure S1c and d).…”

Section: Resultsmentioning

confidence: 94%

Metal‐Organic Framework Templated Synthesis ofg‐C₃N₄/Fe₂O₃@FeP Composites for Enhanced Hydrogen Production

et al. 2019

ChemCatChem

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The simultaneous construction of heterostructures and co‐catalyst loading while maintaining a tight contact favoring charge transfer is important for improving the photocatalytic H2 production of g‐C3N4. Following this approach, we prepared herein a Fe2O3@FeP hybrid material by annealing and phosphidation of a g‐C3N4/Fe metal‐organic framework (MOF). The as‐prepared Fe2O3@FeP was used as both heterojunction and co‐catalyst material to enhance the photocatalytic H2 evolution performance of g‐C3N4 by water splitting under visible‐light irradiation. We developed an optimized g‐C3N4/Fe2O3@FeP‐60 catalyst with a H2 evolution rate as high as 12.03 mmol g−1 h−1 under Eosin Y (EY, 1.0 mmol L−1)‐sensitization. This rate was 12 times higher than that of pristine EY‐sensitized g‐C3N4 (0.97 mmol g−1 h−1). The apparent quantum efficiency (AQE) at 420 nm was 38.8 %. The improved photocatalytic activity of this composite compared to g‐C3N4 can be ascribed to: (i) its enhanced visible‐light absorption intensity; (ii) its efficient electron‐hole separation by the formation of a type‐II heterojunction with Fe2O3 and the loading of an electron collector such as FeP; and (iii) the accelerated H+ reductive reaction resulting from the FeP co‐catalyst. We believe that this work may pave the way for the construction of MOF‐based hybrid H2‐evolution photocatalysts.

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“…Above 100 °C, the sample displayed almost no weight loss until 250 °C. Thereafter, the weight decreased rapidly in the temperature range of 250–280 °C, which is due to decomposition of the organic ligand . Thus, in the two‐step pyrolysis process for Fe 2 O 3 powder synthesis, the first thermal treatment at 250 °C under the Ar atmosphere destroyed and carbonized the organic ligand chain in MIL‐88 A, moreover it would prevent the agglomeration of metal elements, thereby making it beneficial for retention of high porosity.…”

Section: Resultsmentioning

confidence: 99%

Ternary Composite of g‐C₃N₄/ZnFe₂O₄/Fe₂O₃: Hydrothermal Synthesis and Enhanced Photocatalytic Performance

Yang

Chen

et al. 2019

ChemistrySelect

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A ternary composite of g‐C3N4/ZnFe2O4/Fe2O3 was synthesized by a hydrothermal method. Structural and optical properties of the as‐synthesized composites were characterized and the photocatalytic performances were evaluated via the degradation of Rhodamine B under visible light irradiation. Results showed that this ternary composite exhibited a higher photocatalytic activity compared to the binary ZnFe2O4/Fe2O3 systems in this research. The enhanced activity could be attributed to the stepped arrangement of the band structures of its components which enabled electron transfer from g‐C3N4 to ZnFe2O4 then to Fe2O3 through the potential gradient, thus facilitating the charge separation and retarding their recombination. Moreover, the g‐C3N4/ZnFe2O4/Fe2O3 exhibited stable photochemical performance without obvious deterioration after five successive runs, while the ternary composites could be conveniently separated by using an external magnetic field, showing a promising application for the photo‐oxidative degradation of organic contaminants.

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Controlled pyrolysis of MIL-88A to Fe₂O₃@C nanocomposites with varied morphologies and phases for advanced lithium storage

Cited by 152 publications

References 72 publications

Preparation and Electrochemical Properties of Pomegranate-Shaped Fe2O3/C Anodes for Li-ion Batteries

Preparation and Electrochemical Properties of Pomegranate-Shaped Fe2O3/C Anodes for Li-ion Batteries

Metal‐Organic Framework Templated Synthesis ofg‐C₃N₄/Fe₂O₃@FeP Composites for Enhanced Hydrogen Production

Ternary Composite of g‐C₃N₄/ZnFe₂O₄/Fe₂O₃: Hydrothermal Synthesis and Enhanced Photocatalytic Performance

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Controlled pyrolysis of MIL-88A to Fe2O3@C nanocomposites with varied morphologies and phases for advanced lithium storage

Cited by 152 publications

References 72 publications

Preparation and Electrochemical Properties of Pomegranate-Shaped Fe2O3/C Anodes for Li-ion Batteries

Preparation and Electrochemical Properties of Pomegranate-Shaped Fe2O3/C Anodes for Li-ion Batteries

Metal‐Organic Framework Templated Synthesis ofg‐C3N4/Fe2O3@FeP Composites for Enhanced Hydrogen Production

Ternary Composite of g‐C3N4/ZnFe2O4/Fe2O3: Hydrothermal Synthesis and Enhanced Photocatalytic Performance

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Product

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Controlled pyrolysis of MIL-88A to Fe₂O₃@C nanocomposites with varied morphologies and phases for advanced lithium storage

Metal‐Organic Framework Templated Synthesis ofg‐C₃N₄/Fe₂O₃@FeP Composites for Enhanced Hydrogen Production

Ternary Composite of g‐C₃N₄/ZnFe₂O₄/Fe₂O₃: Hydrothermal Synthesis and Enhanced Photocatalytic Performance