One step hydrothermal synthesis of a carbon nanotube/cerium oxide nanocomposite and its electrochemical properties

Kalubarme, Ramchandra S.; Kim, Yong-Han; Park, Chan‐Jin

doi:10.1088/0957-4484/24/36/365401

Cited by 67 publications

(33 citation statements)

References 38 publications

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“…have been successfully deposited on CNTs to fabricate nanocomposites, also solving the problem of CNT agglomeration in solutions without the use of surfactants [159]. These oxides can be deposited as a continuous amorphous or single-crystalline film with controlled thickness, or as discrete units in the form of nanoparticles, nanorods, or nanobeads.…”

Section: Metal Oxides/cnts Hybrids (Nanocomposites)mentioning

confidence: 99%

Manufacturing nanomaterials: from research to industry

et al. 2014

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-Manufacturing of nanomaterials is an interdisciplinary field covering physics, chemistry, biology, materials science and engineering. The interaction between scientists with different disciplines will undoubtedly lead to the production of novel materials with tailored properties. The success of nanomanufacturing depends on the strong cooperation between academia and industry in order to be informed about current needs and future challenges, to design products directly transferred into the industrial sector. It is of paramount importance the selection of the appropriate method combining synthesis of nanomaterials with required properties and limited impurities as well as scalability of the technique. Their industrial use faces many obstacles as there is no suitable regulatory framework and guidance on safety requirements; specific provisions have yet to be established in EU legislation. Moreover, regulations related to the right of intellectual properties as well as the absence of an appropriate framework for patent registration are issues delaying the process of products' industrial application. The utilization of high-quality nanomaterials is now growing and coming to the industrial arena rendering them as the next generation attractive resources with promising applications. Undoubtedly, the existing gap between basic research relating nanomaterials and their application in real life will be overcome in the coming decade.

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Section: Metal Oxides/cnts Hybrids (Nanocomposites)mentioning

confidence: 99%

Manufacturing nanomaterials: from research to industry

et al. 2014

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“…Like many other metal oxides, CeO 2 , a ceramic material, suffers from an inherently low electrical conductivity. Thus, nano CeO 2 has been used as supercapacitor material, often in combination with carbonaceous materials like graphene, reduced graphene oxide (rGO), graphene oxide, nitrogen doped reduced graphene oxide and carbon nanotubes . Supporting CeO 2 over these carbonaceous material improves the conductivity and thereby increases charge storage.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, nano CeO 2 has been used as supercapacitor material, often in combination with carbonaceous materials like graphene, reduced graphene oxide (rGO), graphene oxide, nitrogen doped reduced graphene oxide and carbon nanotubes. [29,30,[39][40][41][42] Supporting CeO 2 over these carbonaceous material improves the conductivity and thereby increases charge storage. Padmanathan and Selladurai showed that CeO 2 nanoparticles (CNPs) and carboncoated CeO 2 nanorods (CNRs) synthesized by a simple hydrothermal process exhibits a specific capacitance (SC) of 381 and 400 F g −1 respectively.…”

Section: Introductionmentioning

confidence: 99%

Morphology and Crystal Planes Effects on Supercapacitance of CeO₂ Nanostructures: Electrochemical and Molecular Dynamics Studies

Jeyaranjan

Sakthivel

Molinari

et al. 2018

Part & Part Syst Charact

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Nano cerium oxide (CeO2) is a promising supercapacitor material, but the effect of morphology on charge storage capacity remains elusive. To determine this effect, three different morphologies, nanorods, cubes, and particles are synthesized by a one‐step hydrothermal process. Electrochemical evaluation through cyclic voltammetry and galvanostatic charge–discharge techniques reveals specific capacitance to be strongly dependent on the nanostructure morphology. The highest specific capacitance in nanorods (162.47 F g−1) is due to the substantially larger surface area relative to the other two morphologies and the predominant exposure of the highly reactive {110} and {100} planes. At comparable surface areas, exposed crystal planes exhibit a profound effect on charge storage. The exposure of highly reactive {100} planes in nanocubes induce a greater specific capacitance compared to nanoparticles, which are dominated by the less reactive {111} facets. The experimental findings are supported by reactivity maps of the nanostructures generated by molecular dynamics simulations. This study indicates that supercapacitors with higher charge storage can be designed through a nanostructure morphology selection strategy.

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“…11,15 However, addition of reducing agents drive the reaction toward zero-valent metal formation (rather than hybridization), which leads to isolated and (Table S1). Following oxides are reported to have formed with metals: Al2O3, [16][17][18] CeO2, 19,20 CoO3, 21,22 Eu2O3, 23,24 FexOy, [25][26][27][28] HfO2, 29,30 MgO, 31 MoO2, 32 NiO, 33 SiO2, [34][35][36] SnO2, 37 TiO2, 38,39 VxOy, 40 ZnO, 41 and ZrO2. 42 On the other hand, Ag, 43 Au, 44 Pt, 45…”

Section: Introductionmentioning

confidence: 99%

Insights into Metal Oxide and Zero-Valent Metal Nanocrystal Formation on Multiwalled Carbon Nanotube Surfaces during Sol-gel Hybridization

Das¹,

Sabaraya²,

Sabo-Attwood³

et al. 2018

Preprint

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Carbon nanotubes are hybridized with metal crystals to impart multifunctionality into the nanohybrids (NHs). Simple but effective synthesis techniques are desired to form both zero-valent and oxides of different metal species on carbon nanotube surfaces. Sol-gel technique brings in significant advantages and is a viable technique for such synthesis. This study probes the efficacy of sol-gel process and aims to identify underlying mechanisms of crystal formation. Standard electron potential (SEP) is used as a guiding parameter to choose the metal species; i.e., highly negative SEP (e.g., Zn) with oxide crystal tendency, highly positive SEP (e.g., Ag) with zero-valent crystal-tendency, and intermediate range SEP (e.g., Cu) to probe the oxidation tendency in crystal formation are chosen. Transmission electron microscopy and X-ray diffraction are used to evaluate the synthesized NHs. Results indicate that SEP can be a reliable guide for the resulting crystalline phase of a certain metal species, particularly when the magnitude of this parameter is relatively high. However, for intermediate range SEP-metals, mix phase crystals can be expected. For example, Cu will form Cu2O and zero-valent Cu crystals, unless the synthesis is performed in a reducing environment.

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One step hydrothermal synthesis of a carbon nanotube/cerium oxide nanocomposite and its electrochemical properties

Cited by 67 publications

References 38 publications

Manufacturing nanomaterials: from research to industry

Manufacturing nanomaterials: from research to industry

Morphology and Crystal Planes Effects on Supercapacitance of CeO₂ Nanostructures: Electrochemical and Molecular Dynamics Studies

Insights into Metal Oxide and Zero-Valent Metal Nanocrystal Formation on Multiwalled Carbon Nanotube Surfaces during Sol-gel Hybridization

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One step hydrothermal synthesis of a carbon nanotube/cerium oxide nanocomposite and its electrochemical properties

Cited by 67 publications

References 38 publications

Manufacturing nanomaterials: from research to industry

Manufacturing nanomaterials: from research to industry

Morphology and Crystal Planes Effects on Supercapacitance of CeO2 Nanostructures: Electrochemical and Molecular Dynamics Studies

Insights into Metal Oxide and Zero-Valent Metal Nanocrystal Formation on Multiwalled Carbon Nanotube Surfaces during Sol-gel Hybridization

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Product

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Morphology and Crystal Planes Effects on Supercapacitance of CeO₂ Nanostructures: Electrochemical and Molecular Dynamics Studies