Ferromagnetic hematite@graphene nanocomposites for removal of rhodamine B dye molecules from water

Liu, Junkun; Cao, Huaqiang; Xiong, Jinping; Cheng, Ziyang

doi:10.1039/c2ce25578b

Cited by 42 publications

(22 citation statements)

References 65 publications

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“…5 Therefore, the preparation and application of MO/graphene composite materials has become a highly topical area. Until now, however, MO/graphene composite has been routinely prepared using the metal salt or compound, sometimes with the involvement of additional reducing agents, including both toxic and hazardous materials (hydrazine [6][7][8][9][10] or NaBH 4 11 ) and some eco-friendly chemical agents (glucose 12 or ascorbic acid 13 ). Recently, Fe, Al, and Zn in the form of active metals were chosen to reduce graphene oxide (GO) to reduced GO (RGO) under different pH values in acid or basic conditions.…”

Section: Introductionmentioning

confidence: 99%

A facile route to synthesize transition metal oxide/reduced graphene oxide composites and their lithium storage performance

et al. 2013

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. (2013). A facile route to synthesize transition metal oxide/reduced graphene oxide composites and their lithium storage performance. RSC Advances, 3 (37), 16597-16603. A facile route to synthesize transition metal oxide/reduced graphene oxide composites and their lithium storage performance AbstractTransition metal oxide (Mn3O4, Fe2O3, Co3O4, and ZnO) and reduced graphene oxide (RGO) composites were successfully synthesized via a hydrothermal method using the direct reaction between the corresponding metal powder and graphene oxide (GO). In this process, the GO can be reduced by transition metal powder in water, and the nanosized metal oxide can be obtained, and homogeneously mixed with and wrapped by RGO to form a metal oxide/RGO composite at the same time. X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and scanning and transmission electron microscopy were used to characterize the as-prepared materials. The different experimental parameters, including reactants, solvents, atmosphere inside the autoclave, temperature, and reaction time, were investigated for their effects on the phase of the products. Furthermore, as an example, the lithium storage properties of Fe2O3/RGO and Co3O4/RGO composites were also investigated. The electrochemical performance shows both good cycling stability (852 mA h g−1 up to 200 cycles) and high rate capability (425 mA h g−1 at the 4 C rate). This can be attributed to the novel RGO-wrapped composite structure, which can buffer the volume changes and maintain good electrical conductivity. were successfully synthesized via a hydrothermal method using the direct reaction between the corresponding metal powder and graphene oxide (GO). In this process, the GO can be reduced by transition metal powder in water, and the nanosized metal oxide can be obtained, and homogeneously mixed with and wrapped by RGO to form a metal oxide/RGO composite at the same time. X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and scanning and transmission electron microscopy were used to characterize the as-prepared materials. The different experimental parameters, including reactants, solvents, atmosphere inside the autoclave, temperature, and reaction time, were investigated for their effects on the phase of the products. Furthermore, as an example, the lithium storage properties of Fe 2 O 3 /RGO and Co 3 O 4 /RGO composites were also investigated. The electrochemical performance shows both good cycling stability (y852 mA h g 21 up to 200 cycles) and high rate capability (425 mA h g 21 at the 4 C rate). This can be attributed to the novel RGO-wrapped composite structure, which can buffer the volume changes and maintain good electrical conductivity.

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Section: Introductionmentioning

confidence: 99%

A facile route to synthesize transition metal oxide/reduced graphene oxide composites and their lithium storage performance

et al. 2013

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“…The C1s spectra contain 390 peaks originating from various oxy-carbon species (−COH, −COOH, 70. Typical α-Fe 2 O 3 signature bands can be observed in 370 the region of 150 to 800 cm -1 .…”

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Structural- and optical-properties analysis of single crystalline hematite (α-Fe₂O₃) nanocubes prepared by one-pot hydrothermal approach

et al. 2016

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15 16 High quality single crystal hematite (α-Fe 2 O 3 ) nanocubes with average dimensions of 40 nm 17 were successfully synthesized by a facile one-pot hydrothermal method. Systematic analyses 18 were performed to investigate the morphological-, structural-and optical-properties of the as-19 synthesized α-Fe 2 O 3 nanocubes. Continuous formation and hourly monitored towards proper 20 arrangement of single crystal α-Fe 2 O 3 nanocubes are observed throughout the hydrothermal 21 heating process of 180°C started from 4 h to 12 h. The probable growth mechanism on the 22 formation of cubic nanostructures is also proposed. Electron micrographs show the cubic α-23 Fe 2 O 3 synthesized at the most optimum 8 h hydrothermal heating duration are indeed 24produced in high-yield and with well-defined cubical shape. Typical rhombohedral structure 25 of cubic α-Fe 2 O 3 was evident by the XRD pattern. The SAED pattern indicates that the α-26

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“…[35][36][37][38][39][40][41][42][43] Because of these, individual graphene sheets and their functionalized derivatives have been used to remove metal ions and organic pollutants from water. [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60] Although these graphene-based nanomaterials show quite high adsorption performance as adsorbents, the additional cost on the removal of these adsorbent materials and the secondary environmental pollution were usually caused because such tiny materials are diffi cult to be collected completely after usage. Therefore, it would be of scientifi c and technological importance to assemble individual sheets into three-dimensional (3D) macroscopic structures which would preserve the unique properties of individual graphene sheets, and offer easy collecting and recycling after water remediation.Herein, we would like to emphasize the recent development of building bulky graphene materials with porous architectures for the water remediation.…”

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Porous Graphene Materials for Water Remediation

Niu

Liu

Zhang

et al. 2014

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Water remediation has been a critical issue over the past decades due to the expansion of wastewater discharge to the environment. Currently, a variety of functional materials have been successfully prepared for water remediation applications. Among them, graphene is an attractive candidate due to its high specific surface area, tunable surface behavior, and high strength. This Concept paper summarizes the design strategy of porous graphene materials and their applications in water remediation, such as the cleanup of oil, removal of heavy metal ions, and elimination of water soluble organic contaminants. The progress made so far will guide further development in structure design strategy of porous materials based on graphene and exploration of such materials in environmental remediation.

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Ferromagnetic hematite@graphene nanocomposites for removal of rhodamine B dye molecules from water

Cited by 42 publications

References 65 publications

A facile route to synthesize transition metal oxide/reduced graphene oxide composites and their lithium storage performance

A facile route to synthesize transition metal oxide/reduced graphene oxide composites and their lithium storage performance

Structural- and optical-properties analysis of single crystalline hematite (α-Fe₂O₃) nanocubes prepared by one-pot hydrothermal approach

Porous Graphene Materials for Water Remediation

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Ferromagnetic hematite@graphene nanocomposites for removal of rhodamine B dye molecules from water

Cited by 42 publications

References 65 publications

A facile route to synthesize transition metal oxide/reduced graphene oxide composites and their lithium storage performance

A facile route to synthesize transition metal oxide/reduced graphene oxide composites and their lithium storage performance

Structural- and optical-properties analysis of single crystalline hematite (α-Fe2O3) nanocubes prepared by one-pot hydrothermal approach

Porous Graphene Materials for Water Remediation

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Product

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Structural- and optical-properties analysis of single crystalline hematite (α-Fe₂O₃) nanocubes prepared by one-pot hydrothermal approach