Reductive hybridization route with exfoliated graphene oxide and MoS2 nanosheets to efficient electrode materials

Patil, S. B.; Adpakpang, Kanyaporn; Oh, Seung Mi; Lee, Jang Mee; Hwang, Seong Ju

doi:10.1016/j.electacta.2015.06.133

Cited by 14 publications

(4 citation statements)

References 38 publications

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“…However, the further application of MoS 2 nanoflakes in biosensors is impeded by their low electric conductivity , which can be remarkably improved by hybridization with carbon‐based materials, such as reduced graphene oxide (rGO). During the preparation of rGO, it generally introduces significant defects and damages electric conductivity of graphene . Three‐dimensional (3D) graphene foam can be synthesized by chemical vapor deposition (CVD) using nickel foam as the template .…”

Section: Introductionsupporting

confidence: 74%

Preparation of MoS₂‐graphene Hybrid Nanosheets and Simultaneously Electrochemical Determination of Levodopa and Uric Acid

et al. 2017

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MoS2 nanoflakes were prepared by exfoliating commercial MoS2 powders with the assistance of ultrasound and graphene foam was synthesized by chemical vapor deposition using nickel foam as the template. MoS2‐graphene hybrid nanosheets were developed through the combination of MoS2 nanoflakes and graphene nanosheets by ultrasonic dispersion. The hybrid nanosheets were sprayed onto the ITO coated glass, which acts as an electrode for the simultaneously electrochemical determination of levodopa and uric acid. The MoS2‐graphene hybrid nanosheets were characterized by scanning electron microscopy, X‐ray diffraction and Raman spectroscopy. The results show that the hybrid nanosheets are composed of MoS2 and graphene with a sheet‐like morphology. The sensitivity of the electrode for levodopa and uric acid is 0.36 μA μM−1 and 0.39 μA μM−1, respectively. The electrode also shows low limit of detection, good selectivity, reproducibility and stability. And it is potential for use in clinical research.

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Section: Introductionsupporting

confidence: 74%

Preparation of MoS₂‐graphene Hybrid Nanosheets and Simultaneously Electrochemical Determination of Levodopa and Uric Acid

et al. 2017

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“…The present synthetic strategy can provide a universal methodology to explore high performance nanocomposite electrode materials. Considering the fact that the use of rG-O nanosheet as a conducting additive has evoked a large numbers of researches about the graphene-based composite electrode materials, − ,,,,,, the application of this emerging RuO 2 nanosheet must induce a great deal of research activity for the development of new efficient composite electrode materials. Exploring novel high performance electrode materials for emerging secondary batteries such as Na ion, Li–sulfur, and Li–air batteries via the immobilization of electrochemically active inorganic solids on the surface of RuO 2 nanosheet is currently under way in our laboratory.…”

Section: Discussionmentioning

confidence: 99%

“…There has been a great deal of research interest devoted to the synthesis and application of the exfoliated two-dimensional (2D) nanosheets of layered compounds. − The wide 2D surface and very thin thickness of the exfoliated nanosheet render this material a useful hybridization matrix for immobilizing diverse chemical species such as inorganic nanostructures, organic molecules, polymers, and biomolecules. − In particular, the hybridization of nanostructured inorganic solids with reduced graphene oxide (rG-O) nanosheet is widely studied as a powerful way of optimizing their functionalities through the enhancement of electrical conductivity and porosity. − The anchoring of electrochemically active metal oxide on the rG-O nanosheet is highly effective in exploring new 2D hybrid materials having excellent functionality for energy storage, energy harvesting, and electrocatalysis. − However, a strong self-aggregating tendency of rG-O nanosheets prevents from synthesizing homogeneously mixed hybrid structure of graphene–metal oxide and optimizing their pore structure . Moreover, there is a significant dissimilarity in the chemical nature of hydrophobic rG-O and hydrophilic metal oxide, which is not favorable for achieving efficient chemical interaction between these materials.…”

Section: Introductionmentioning

confidence: 99%

Superior Additive of Exfoliated RuO₂ Nanosheet for Optimizing the Electrode Performance of Metal Oxide over Graphene

Lee

Kim

et al. 2016

J. Phys. Chem. C

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An effective way to optimize the electrode performance of metal oxide was developed by employing exfoliated 2D RuO 2 nanosheet as a conducting additive. The exfoliated RuO 2 nanosheet was easily incorporated into the Li−MnO 2 nanocomposite via a simple mixing of exfoliated RuO 2 and MnO 2 nanosheets, followed by the restacking with Li + ions. The incorporation of RuO 2 nanosheet was found to be quite effective in increasing the surface area of the restacked Li−MnO 2 nanocomposite. The obtained heterolayered Li−MnO 2 −RuO 2 nanocomposites delivered much greater specific capacitances than do the pristine Li−MnO 2 and Li−RuO 2 nanocomposites. Considering the fact that the RuO 2 nanosheet has higher electrode activity than the MnO 2 nanosheet, the greater specific capacitance of Li−MnO 2 −RuO 2 nanocomposite than that of Li−RuO 2 strongly suggests that the incorporation of a small amount of RuO 2 nanosheet into the restacked Li−MnO 2 nanocomposite induces a synergistic improvement in its electrode activity. Of prime importance is that the Li−MnO 2 −RuO 2 nanocomposites showed somewhat better electrode performances than the reduced graphene oxide (rG-O)incorporated Li−MnO 2 −rG-O homologues, attributable to more efficient charge transport and pore structure upon RuO 2 incorporation. The hydrophilic RuO 2 nanosheet is more effective in making a stronger chemical interaction with hydrophilic MnO 2 and also in depressing the self-aggregation of nanosheets compared to hydrophobic rG-O nanosheet. The present study clearly demonstrates that the RuO 2 nanosheet can be used as a better additive for improving the electrode performance of metal oxides compared with widely used rG-O.

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“…The universal validity of exfoliated metal oxide nanosheet as an additive for optimizing the electrode performance of metal dichalcogenide-graphene nanocomposite is verifiedw ith the other metal chalcogenide of MoS 2 . [37] Several Na-MoS 2 -rG-O-titanate nanocomposites with the titanate/rG-O ratios of 0, 0.01, 0.025, and 0.05 are prepared and denoted as NMGT0, NMGT1, NMGT2.5,a nd NMGT5,r espectively.A sareference, the restacked Na-MoS 2 nanocomposite is also synthesized by the restacking of exfoliated MoS 2 nanosheets with Na + ions.…”

Section: Application Of the Presentm Ethod For Mos 2 Nanosheetmentioning

confidence: 99%

A 2D Metal Oxide Nanosheet as an Efficient Additive for Improving Na‐Ion Electrode Activity of Graphene‐Based Nanocomposites

Park

et al. 2017

Chemistry A European J

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What is the most significant result of this study? An efficient synthetic strategy to explore high-performance Na-ion electrode materials was developed by employing exfoliated metal oxide nanosheets as an additive for graphene-based nanocompo-sites. The incorporation of small amount of metal oxide nanosheets into metal-chalcogenide-graphene nanocomposites is quite effective in improving the nanoscale mixing of components and in enhancing the porosity of composite structure. These new nanocom-posite materials show much better Na-ion electrode performance with larger discharge capacity and higher rate characteristics than the metal oxide-free nanocomposite. What prompted you to investigate this topic/problem? Recently,w ef ound that the incorporation of exfoliated metal oxide nanosheets leads to the significant improvement of the pore and composite structures of graphene-based nanocomposites. Considering that many graphene-based nanocomposites show promising Na-ion electrode functionalities, we tried to apply this synthetic strategy to metal-chalcogenide-graphene nanocompo-sites to explore efficient electrode material for Na-ion batteries-an emerging alternative to currently commercialized Li-ion batteries. What was the biggest challenge(on the way to the results presented in this paper)? Considering that the exfoliated titanate nanosheets show quite high efficiency as an additive for improving the Na-ion electrode performance of SnS 2-graphene nanocomposites, the optimal concentration of titanate additive is much lower than we expected. Thus, the biggest challenge of this work is to determine the optimal concentration of the nanosheets for enhancing the Na-ion electrode functionality of the nanocomposites. Invited for the cover of this issue is the group of Seong-Ju Hwang at the Ewha WomansU niversity.T he image depicts the criticalr ole of exfoliated metal oxide nanosheets as additivesi ni mproving the sodium-ion electrode functionality of metal-chalcogenide-graphene nanocomposites. Read the full text of the article at

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Reductive hybridization route with exfoliated graphene oxide and MoS2 nanosheets to efficient electrode materials

Cited by 14 publications

References 38 publications

Preparation of MoS₂‐graphene Hybrid Nanosheets and Simultaneously Electrochemical Determination of Levodopa and Uric Acid

Preparation of MoS₂‐graphene Hybrid Nanosheets and Simultaneously Electrochemical Determination of Levodopa and Uric Acid

Superior Additive of Exfoliated RuO₂ Nanosheet for Optimizing the Electrode Performance of Metal Oxide over Graphene

A 2D Metal Oxide Nanosheet as an Efficient Additive for Improving Na‐Ion Electrode Activity of Graphene‐Based Nanocomposites

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Reductive hybridization route with exfoliated graphene oxide and MoS2 nanosheets to efficient electrode materials

Cited by 14 publications

References 38 publications

Preparation of MoS2‐graphene Hybrid Nanosheets and Simultaneously Electrochemical Determination of Levodopa and Uric Acid

Preparation of MoS2‐graphene Hybrid Nanosheets and Simultaneously Electrochemical Determination of Levodopa and Uric Acid

Superior Additive of Exfoliated RuO2 Nanosheet for Optimizing the Electrode Performance of Metal Oxide over Graphene

A 2D Metal Oxide Nanosheet as an Efficient Additive for Improving Na‐Ion Electrode Activity of Graphene‐Based Nanocomposites

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Preparation of MoS₂‐graphene Hybrid Nanosheets and Simultaneously Electrochemical Determination of Levodopa and Uric Acid

Preparation of MoS₂‐graphene Hybrid Nanosheets and Simultaneously Electrochemical Determination of Levodopa and Uric Acid

Superior Additive of Exfoliated RuO₂ Nanosheet for Optimizing the Electrode Performance of Metal Oxide over Graphene