Graphene-templated formation of two-dimensional lepidocrocite nanostructures for high-efficiency catalytic degradation of phenols

Cheng, Peng; Jiang, Bowei; Liu, Qing; Guo, Zhi; Xu, Zijian; Huang, Qing; Xu, Hongjie; Tai, Renzhong; Fan, Chunhai

doi:10.1039/c0ee00495b

Cited by 85 publications

(51 citation statements)

References 44 publications

(43 reference statements)

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“…In Figure S7A (SI), the peaks at 711.01 eV, 712.59 eV, 714.6 eV and 716.6 eV should be related to Fe 3+ ,‐ and the peak at 711.01 eV should be matched to Fe 2 O 3 . The peak at 720.7 eV was due to FeOOH . After the LSV, the area of Fe 3+ was increased to 74%, which confirmed that LSV produced more Fe 3+ , and generated FeOOH.…”

Section: Resultsmentioning

confidence: 99%

Self‐Supportive NiFe hydroxide with High Electrocatalytic Activity for Oxygen and Hydrogen Evolution Reaction

Guo

Pan

et al. 2019

ChemistrySelect

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Here, a facile method to prepare low‐cost self‐supportive NiFe hydroxide on etching galvanized sheet iron (EGSI) (FexNiyOOH/EGSI) for electrochemical water splitting was proposed for the first time. The EGSI was firstly treated in Fe2+, Ni2+ and urea mixture to obtain FexNiyOH/EGSI and then were further transformed into FexNiyOOH/EGSI by the electrooxidation in NaOH solution. SEM results indicated various morphologies including nanoflowers, nanosheets and cubes could be obtained depending on the ratio of Fe2+ and Ni2+. Raman spectra, XRD and electrochemical results indicated that the NiOOH was produced in electrooxidation process, which improved its catalytic activity of OER remarkably. Besides, modest Fe‐doping could make it achieve better catalytic activity because Fe‐doping could alter the redox properties of NiFe hydroxide to result in low overpotential. As a result, the FexNiyOOH/EGSI presented good OER and HER performances. The optimum Fe1.5Ni0.5OOH/EGSI as cathode and Fe0.2Ni1.8OOH/EGSI as anode were applied for water splitting, achieving a current density of 10 mA cm‐2 at 1.69 V, indicating that it could work at a lower potential.

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Section: Resultsmentioning

confidence: 99%

Self‐Supportive NiFe hydroxide with High Electrocatalytic Activity for Oxygen and Hydrogen Evolution Reaction

Guo

Pan

et al. 2019

ChemistrySelect

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“…The resulting materials are characterized by a range of state‐of‐the‐art techniques, which identify that the average thickness of the γ‐FeOOH is about 2.1 nm. [ 116 ] Aside from above mentioned nonreactive templates (CuO and graphene), reactive templates are also impressive for fabricating thin‐layered materials. For example, Di et al proposed an unique self‐sacrificial template‐directed method for fabricating ultrathin Bi 2 MoO 6 .…”

Section: Strategies For Synthesizing Thin‐layered Photocatalystsmentioning

confidence: 99%

Thin‐Layered Photocatalysts

Sun

Huang

Zhao

et al. 2020

Adv Funct Materials

132

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Semiconductor photocatalysis, a green and sustainable technology, is of great significance for solving environmental pollution and energy shortages. However, the common problems of inefficient light harvesting, rapid recombination of electron-hole pairs, and low surface reactive reaction sites for photocatalysts urgently need to be solved. In this regard, thin-layered photocatalysts are considered to be one of the most promising candidates for addressing these issues, due to their unique surface and electronic properties. In this review, the various strategies for constructing thin-layered photocatalysts are summarized, and emphasis is given to approaches for optimizing the photocatalytic performance of the thin-layered materials, which can be classified into surface engineering and junction construction. In addition, the photocatalytic applications of thin-layered materials, i.e., water splitting, CO 2 reduction, nitrogen fixation, and molecule oxygen activation, are summarized. Finally, based on current achievements in thin-layered photocatalysts, their future development and challenges are discussed.

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“…As a typical layered material,18 lepidocrocite (γ‐FeOOH) has promising application for removal of heavy metal ions from waste water19 and photoelectrochemical water splitting 20. Recently, ultrathin lepidocrocite nanosheets were synthesized on graphene, and the composites were used for the degradation of phenols in waste water 21. However, successful exfoliation of freestanding ultrathin lepidocrocite nanosheets from the bulk material has not been reported to date to our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Ultrathin Lepidocrocite Nanosheets from Layered Precursors

Yang

Zhong

Wang

et al. 2014

Chemistry An Asian Journal

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Ultrathin two-dimensional nanosheets have been widely studied because of their peculiar properties and promising applications. As a typical layered material, successful exfoliation of freestanding ultrathin lepidocrocite (γ-FeOOH) nanosheets from the bulk material has not been reported to date. Herein, we report a facile synthetic route to prepare ultrathin lepidocrocite nanosheets with a thickness of approximately 2-3 nm from FeOx -propanediol layered precursors through weakening of the hydrogen bonds during the crystallization process. The ultrathin morphology and single-crystal structure of the nanosheets were confirmed by transmission electron microscopy, X-ray diffraction, and atomic force microscopy. The formation process of these nanosheets demonstrated simultaneous exfoliation and crystallization of lepidocrocite in basic aqueous solution. The obtained ultrathin nanosheets exhibited a much lower Néel temperature (18.3 K) than bulk lepidocrocite and weak ferromagnetic behavior below this temperature.

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Graphene-templated formation of two-dimensional lepidocrocite nanostructures for high-efficiency catalytic degradation of phenols

Cited by 85 publications

References 44 publications

Self‐Supportive NiFe hydroxide with High Electrocatalytic Activity for Oxygen and Hydrogen Evolution Reaction

Self‐Supportive NiFe hydroxide with High Electrocatalytic Activity for Oxygen and Hydrogen Evolution Reaction

Thin‐Layered Photocatalysts

Facile Synthesis of Ultrathin Lepidocrocite Nanosheets from Layered Precursors

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