TiO2/reduced graphene oxide composite based nano-petals for supercapacitor application: effect of substrate

Fulari, A. V.; Reddy, M.V. Ramana; Jadhav, S. T.; Ghodake, Gajanan; Kim, Dae-Young; Lohar, G. M.

doi:10.1007/s10854-018-9146-5

Cited by 31 publications

(15 citation statements)

References 41 publications

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“…Among TMO, TiO 2 is one of the most used compounds for electrochemical applications due to its low cost, availability and chemical stability, being also a target material for supercapacitors development. Fulari et al [ 40 ] obtained TiO 2 /rGO powder composite with nanopetal-like microstructure by a coprecipitation method, and subsequent deposition on Cu and steel substrates as a way to reduce the device cost, reporting a better capacitive performance with the steel substrate (192 F·g −1 at 5mV·s −1 ). The presence of TiO 2 np apparently worked synergistically with graphene, preventing sheets agglomeration and increasing the specific surface area of composites as well; for instance, a 3D rGO@TiO 2 hybrid [ 41 ] showed a specific surface area of 171 m 2 ·g −1 , more than 3 times higher than that of pure 3D rGO, achieving a capacitance of 235 F·g −1 at 0.5 A·g −1 .…”

Section: Ceramic/graphene Composites Used In Energy Production and Storagementioning

confidence: 99%

Applications of Ceramic/Graphene Composites and Hybrids

et al. 2021

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Research activity on ceramic/graphene composites and hybrids has increased dramatically in the last decade. In this review, we provide an overview of recent contributions involving ceramics, graphene, and graphene-related materials (GRM, i.e., graphene oxide, reduced graphene oxide, and graphene nanoplatelets) with a primary focus on applications. We have adopted a broad scope of the term ceramics, therefore including some applications of GRM with certain metal oxides and cement-based matrices in the review. Applications of ceramic/graphene hybrids and composites cover many different areas, in particular, energy production and storage (batteries, supercapacitors, solar and fuel cells), energy harvesting, sensors and biosensors, electromagnetic interference shielding, biomaterials, thermal management (heat dissipation and heat conduction functions), engineering components, catalysts, etc. A section on ceramic/GRM composites processed by additive manufacturing methods is included due to their industrial potential and waste reduction capability. All these applications of ceramic/graphene composites and hybrids are listed and mentioned in the present review, ending with the authors’ outlook of those that seem most promising, based on the research efforts carried out in this field.

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Section: Ceramic/graphene Composites Used In Energy Production and Storagementioning

confidence: 99%

Applications of Ceramic/Graphene Composites and Hybrids

et al. 2021

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“…Graphene oxide (GO) and reduced-GO (rGO) are excellent candidates to anchor semiconductors nanocrystals due to the presence of functional groups in GO surface and offer desirable efficiency in electron-hole pairs separation [1][2][3][4][5][6][7][8][9][10]. Reduced graphene oxide (rGO)/WO 3 heterostructures have a better UV photocatalytic activity in the degradation of the methylene blue dye at the 15% RGO mass ratio in WO 3 than others rGO-WO 3 proportion (from 6 to 20%) [11].…”

Section: Introductionmentioning

confidence: 99%

Direct photo-oxidation and superoxide radical as major responsible for dye photodegradation mechanism promoted by TiO2–rGO heterostructure

Byzynski

Volanti

Ribeiro

et al. 2018

J Mater Sci: Mater Electron

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The increase in photocatalytic activity of reduced graphene oxide-TiO 2 heterostructures under ultraviolet and visible illumination is already well known, as the photocatalyst mechanism modifications with heterostructure formation. However, which step in the degradation mechanism is modified with reduced graphene oxide-TiO 2 heterostructure formation has been not demonstrated yet. These specific modifications are caused by the alteration in reactive oxygen species production. In this way, the goal of this study is defined which reactive oxygen species are produced by reduced graphene oxide-TiO 2 heterostructure in the photocatalytic mechanism. A fast synthesis method to obtain this heterostructure by the microwave-assisted solvothermal method is presented, obtaining an improvement of photocatalytic efficiency, under UV and visible illumination. The non-hydrolytic method favors a better distribution of TiO 2 nanoparticles around the reduced graphene oxide structure and inhabits the charge carrier recombination, showing a faster electron transfer than TiO 2 samples. The RhB discoloration mechanism confirms that the reduced graphene oxide presence modifies the main reactive oxygen species produced. Under UV illumination, O 2 H* radical is the dominant reactive oxygen species produced by TiO 2. For the heterostructure, the direct oxidation by oxygen vacancy is the primary mechanism step. Under visible illumination, O 2 H* is the main reactive oxygen species for both materials. The results present a better understanding of principal reasons related to the improvement in photocatalytic activity and could be useful in semiconductor heterostructure design.

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“…This increases the total resistance of the system thereby hindering the overall stability of the electrode. 57,58 Fig. S6 † illustrates the cyclic voltammograms of MnFe 2 O 4 /rGO nanoneedles and nanoparticles deposited on the Cu substrate recorded at various scan rates from 5 to 100 mV s −1 .…”

Section: Resultsmentioning

confidence: 99%

Enhanced electrochemical activities of morphologically tuned MnFe₂O₄ nanoneedles and nanoparticles integrated on reduced graphene oxide for highly efficient supercapacitor electrodes

et al. 2021

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TiO2/reduced graphene oxide composite based nano-petals for supercapacitor application: effect of substrate

Cited by 31 publications

References 41 publications

Applications of Ceramic/Graphene Composites and Hybrids

Applications of Ceramic/Graphene Composites and Hybrids

Direct photo-oxidation and superoxide radical as major responsible for dye photodegradation mechanism promoted by TiO2–rGO heterostructure

Enhanced electrochemical activities of morphologically tuned MnFe₂O₄ nanoneedles and nanoparticles integrated on reduced graphene oxide for highly efficient supercapacitor electrodes

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TiO2/reduced graphene oxide composite based nano-petals for supercapacitor application: effect of substrate

Cited by 31 publications

References 41 publications

Applications of Ceramic/Graphene Composites and Hybrids

Applications of Ceramic/Graphene Composites and Hybrids

Direct photo-oxidation and superoxide radical as major responsible for dye photodegradation mechanism promoted by TiO2–rGO heterostructure

Enhanced electrochemical activities of morphologically tuned MnFe2O4 nanoneedles and nanoparticles integrated on reduced graphene oxide for highly efficient supercapacitor electrodes

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Enhanced electrochemical activities of morphologically tuned MnFe₂O₄ nanoneedles and nanoparticles integrated on reduced graphene oxide for highly efficient supercapacitor electrodes