Ultrathin graphene oxide encapsulated in uniform MIL-88A(Fe) for enhanced visible light-driven photodegradation of RhB

Liu, Ning; Huang, Wenyuan; Zhang, Xiaodong; Tang, Liang; Wang, Liang; Wang, Yuxin; Wu, Minghong

doi:10.1016/j.apcatb.2017.09.020

Cited by 412 publications

(148 citation statements)

References 68 publications

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“…The preparation processes of CoFeS@rGO are schematically illustrated in Figure 1 a. First, an iron‐metal‐organic‐framework (Fe‐MOF), MIL‐88A, was prepared as the sacrificial template (Figure S1a, Supporting Information) . The MIL‐88A shows a well‐defined polyhedron morphology with an average diameter/length of 500/950 nm (Figure b).…”

Section: Resultsmentioning

confidence: 99%

Promoting Highly Reversible Sodium Storage of Iron Sulfide Hollow Polyhedrons via Cobalt Incorporation and Graphene Wrapping

Huang

Fan

Xie

et al. 2019

Advanced Energy Materials

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Sodium ion batteries (SIBs) have drawn significant attention owing to their low cost and inherent safety. However, the absence of suitable anode materials with high rate capability and long cycling stability is the major challenge for the practical application of SIBs. Herein, an efficient anode material consisting of uniform hollow iron sulfide polyhedrons with cobalt doping and graphene wrapping (named as CoFeS@rGO) is developed for high‐rate and long‐life SIBs. The graphene‐encapsulated hollow composite assures fast and continuous electron transportation, high Na+ ion accessibility, and strong structural integrity, showing an extremely small volume expansion of only 14.9% upon sodiation and negligible volume contraction during the desodiation. The CoFeS@rGO electrode exhibits high specific capacity (661.9 mAh g−1 at 100 mA g−1), excellent rate capability (449.4 mAh g−1 at 5000 mA g−1), and long cycle life (84.8% capacity retention after 1500 cycles at 1000 mA g−1). In situ X‐ray diffraction and selected‐area electron diffraction patterns show that this novel CoFeS@rGO electrode is based on a reversible conversion reaction. More importantly, when coupled with a Na3V2(PO4)3/C cathode, the sodium ion full battery delivers a superexcellent rate capability (496.8 mAh g−1 at 2000 mA g−1) and ≈96.5% capacity retention over 200 cycles at 500 mA g−1 in the 1.0–3.5 V window. This work indicates that the rationally designed anode material is highly applicable for the next generation SIBs with high‐rate capability and long‐term cyclability.

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Section: Resultsmentioning

confidence: 99%

Promoting Highly Reversible Sodium Storage of Iron Sulfide Hollow Polyhedrons via Cobalt Incorporation and Graphene Wrapping

Huang

Fan

Xie

et al. 2019

Advanced Energy Materials

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“…[18] Figure 4c shows the three peaks of O 1s at 533.1 eV, 532.1 eV, and 531.4 eV belong to CÀ O, the oxygen constituent in the C=O of ligand linkers and the FeÀ O bonds of NM88@RGO-15, respectively. [20,33] For the Fe 2p XPS spectrum (Figure 4d), two peaks appear at 711.8 eV (Fe 2p 3/2 ) and 725.5 eV (Fe 2p 1/2 ), their peak distance being about 13.6 eV, consistent with the Fe(III) of Fe 2 O 3 . [34] In addition, the peaks at 711.9 eV and 725.5 eV with a satellite signal at 718 eV are the feature of Fe 3 + in NM88@RGO-15.…”

Section: Fabrication and Characterization Of Photocatalystsmentioning

confidence: 80%

“…The carboxylate group (C=O) of ligand linkers is located at the binding energy of 288.6 eV . Figure c shows the three peaks of O 1s at 533.1 eV, 532.1 eV, and 531.4 eV belong to C−O, the oxygen constituent in the C=O of ligand linkers and the Fe−O bonds of NM88@RGO‐15, respectively . For the Fe 2p XPS spectrum (Figure d), two peaks appear at 711.8 eV (Fe 2p 3/2 ) and 725.5 eV (Fe 2p 1/2 ), their peak distance being about 13.6 eV, consistent with the Fe(III) of Fe 2 O 3 .…”

Section: Resultsmentioning

confidence: 98%

Construction of 2D MOFs@reduced Graphene Oxide Nanocomposites with Enhanced Visible Light‐induced Fenton‐like Catalytic Performance by Seeded Growth Strategy

Hou

Zhang

et al. 2019

ChemCatChem

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Seeded growth strategy to synthesize NH2‐MIL‐88B(Fe) embedded on reduced graphene oxide (NM88@RGO) is reported in this work. The 2D NM88@RGO composites show intensive Fenton‐like catalytic performance in the visible light‐driven degradation of contaminant. Among as‐synthesized samples, NM88@RGO‐15 is confirmed to possess the highest catalytic activity to the removal of RhB within 1 h and the efficiency is held at high level after 5 cycles. Besides, the synergistic interaction between NH2‐MIL‐88B(Fe) and RGO and photocatalytic mechanism are investigated thoroughly by the electrochemical measurements, the trap experiment of active species, and the analysis of energy‐level position. RGO is capable of acting as a template to direct the formation of 2D nanostructures and behaves as an electron‐captured net to facilitate the charge transfer and inhibit the recombination of electron‐holes on the NH2‐MIL‐88B(Fe). The homogeneous distribution of Fe‐MOFs particles on RGO nanosheets is in favor of the formation and exposure of active sites for light‐driven Fenton‐like reaction.

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“…Other peaks can be assigned to C-O (285.48 eV), C=O (287.48 eV) and -COOH (289.48). Furthermore, C-O bond represent the C-O-C (epoxy) bonding and C-OH (phenolic) functional groups attached to the basal planes of graphene sheets [38][39][40]. In O1s spectra, major peak at 533.48 eV is attributed to aromatic group (C-O) [41].…”

Section: Xps Analysismentioning

confidence: 99%

Graphene Oxide as An Efficient Photocatalyst For Photocatalytic Reduction of CO2 Into Solar Fuel

Shehzad¹,

Johari²,

Murugesan³

et al. 2018

INT. J. AUTOMOT. MECH. ENG.

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Photocatalytic reduction of CO2 into solar fuel such as methane and methanol, is an attractive approach to simultaneously solve the energy crisis and global warming problem. Herein, comparative photocatalytic activity of graphene oxide nanosheets have been investigated for photocatalytic reduction of CO2 into methane and methanol in continuous gas and liquid phase photoreactor system. The graphene oxide sheets were prepared according to Tour's method. The chemical composition and optical properties was evaluated through XPS and UV-vis spectroscopy. Graphene oxide nanosheets exhibited maximum amount of 224.87 μmol/g.h methanol and 14.8 μmol/g.h methane in liquid and gas phase system, respectively. Higher yield of methanol in liquid phase compared to methane in gaseous system can be attributed to dispersion of graphene oxide sheets in water. Hence, graphene oxide nanosheets are efficient photocatalyst for CO2 reduction into methanol. Nevertheless, further research is essential to improve the photostability of graphene oxide sheets for real application of photocatalytic CO2 reduction.

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Ultrathin graphene oxide encapsulated in uniform MIL-88A(Fe) for enhanced visible light-driven photodegradation of RhB

Cited by 412 publications

References 68 publications

Promoting Highly Reversible Sodium Storage of Iron Sulfide Hollow Polyhedrons via Cobalt Incorporation and Graphene Wrapping

Promoting Highly Reversible Sodium Storage of Iron Sulfide Hollow Polyhedrons via Cobalt Incorporation and Graphene Wrapping

Construction of 2D MOFs@reduced Graphene Oxide Nanocomposites with Enhanced Visible Light‐induced Fenton‐like Catalytic Performance by Seeded Growth Strategy

Graphene Oxide as An Efficient Photocatalyst For Photocatalytic Reduction of CO2 Into Solar Fuel

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