NiFe2O4 / rGO nanocomposites produced by soft bubble assembly for energy storage and environmental remediation

Rajendran, T.; Lekshmi, G.S.; Padmanathan, N.; Selvaraj, V.; Bazaka, Olha; Levchenko, Igor; Bazaka, Kateryna; Mandhakini, M.

doi:10.1016/j.renene.2021.07.088

Cited by 32 publications

(29 citation statements)

References 69 publications

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“…[68] The super hydrophilic properties thus obtained are very stable, more than those obtained by deposition of hydrophilic polymer by plasma. [69,70] A simple theoretical model for the treated surface-air interface energy is developed, based on a self-affine scaling behavior, in very good agreement with the experimental findings. We conclude that PET treated surfaces (both films and tissues) display characteristic wetting properties typical of a Wenzel regime, rather than a Cassie-Baxter one.…”

Section: Discussionmentioning

confidence: 57%

Hydrophilicity and Hydrophobicity Control of Plasma‐Treated Surfaces via Fractal Parameters

Piferi

Bazaka

D'Aversa

et al. 2021

Adv Materials Inter

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It is still problematic to define a direct relationship between specific properties of a nanostructured surface (e.g., wettability) and its morphology. Not surprisingly, scientists continue to explore en masse the cut‐and‐try method. In this work, new insights are presented into the correlation of functional properties of the complex nanocomposites with their morphological characteristics. Using polyethylene‐terephthalate (PET) as a model material due to its importance and wide use in experiments, super‐hydrophilic nanocomposites amenable to be used in a variety of industrial applications are first developed, by exposing PET samples to oxygen plasma under controlled conditions. The morphology of the surfaces is confirmed using AFM and SEM techniques, and wettability in air and its oleophobic properties in water using contact angle and roll‐off measurements. Next, different analytical tools such as Minkowski connectivity (Euler‐Poincaré characteristic), Hough distributions and 2D FFT are applied to study ordering, connectivity, and fractal characteristics of the samples. It is concluded that fractal dimension, along with ordering and connectivity, are among the major characteristics of the nanocomposite that determine many important physical and chemical properties of the functional nanomaterials, and the fractal dimension could be a target morphological feature to inform the design of fabrication technology.

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Section: Discussionmentioning

confidence: 57%

Hydrophilicity and Hydrophobicity Control of Plasma‐Treated Surfaces via Fractal Parameters

Piferi

Bazaka

D'Aversa

et al. 2021

Adv Materials Inter

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“…The structure and chemistry of the composite makes it a particularly good material for the indirect degradation of pollutants, e.g., dyes generated by the textile industry, through the oxidation and reduction mechanism outlined in Figure 5b. [ 98 ]…”

Section: Thermal Methods For Biowaste‐to‐nanomaterials Conversionmentioning

confidence: 99%

“…Reproduced with permission. [ 98 ] Copyright 2022, Elsevier. c) Schematic representation for the synthesis of peanut shell—few‐layer graphene active material and its subsequent integration into a solid‐state device.…”

Section: Thermal Methods For Biowaste‐to‐nanomaterials Conversionmentioning

confidence: 99%

“…In the case of a “direct” thermal treatment of water‐containing waste without prior drying, the first stage (heating of the precursor) usually results in complete drying and thus, dry waste is then converted in to the nanomaterial. Given that the process usually requires the temperature much exceeding the water evaporation temperature (e.g., 300 to 800 °C [ 98 ] ), the precursors could be considered completely dry during the reaction.…”

Section: Plasma and Thermal Methods: Which One To Chose?mentioning

confidence: 99%

“…Decoration of thus-produced graphene oxide using functional NiO and NiFe 2 O 4 nanoparticles resulted in a material with complex hierarchical architecture and excellent energy storage and photocatalytic characteristics. [98,99] The synergistic combination of NiFe 2 O 4 nanoparticles and reactive edge-rich rGO nanoflakes allowed the material to produce excellent specific capacitance of about 600 F g −1 at current density of 1 A g −1 . The retention rate was also very good, at 86.5% after 2000 cycles.…”

Section: Production Of Graphene Oxide and Reduced Graphene Oxide From...mentioning

confidence: 99%

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Functional Nanomaterials from Waste and Low‐Value Natural Products: A Technological Approach Level

Levchenko

Mandhakini

Prasad

et al. 2022

Adv Materials Technologies

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Low‐ and negative‐value (waste) products represent a valuable resource. Its use as a source for the fabrication of high value materials represents a lucrative pathway to increasing sustainability and decreasing the economic cost of various industries. Thermochemical methods for the valorization of biowaste and low‐value natural products are simple and cheap yet sufficiently efficient to deliver significant economic benefits. Plasma‐based methods represent another family of technologies for waste‐to‐value conversion. The nanostructure nucleation and growth in plasmas involve a complex set of physical and chemical processes that occur in bulk plasma and on surfaces. The choice between these two types of technology assumes a complex optimization that takes into account several factors including the cost of precursors; initial outlay and operating cost of equipment; the cost of labor; the cost of production engineering including the research and development efforts for designing the industrial technology, which is typically higher for the plasma‐based systems, and so on. In this article a technology level comparison of thermochemical and plasma‐based techniques for the valorization of raw and waste biomass, where the intent is to use the resulting products for environmental remediation, energy storage, optoelectronics, and biomedical applications, is presented.

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NiFe2O4 / rGO nanocomposites produced by soft bubble assembly for energy storage and environmental remediation

Cited by 32 publications

References 69 publications

Hydrophilicity and Hydrophobicity Control of Plasma‐Treated Surfaces via Fractal Parameters

Hydrophilicity and Hydrophobicity Control of Plasma‐Treated Surfaces via Fractal Parameters

Functional Nanomaterials from Waste and Low‐Value Natural Products: A Technological Approach Level

Nanoengineered Carbon‐Based Interfaces for Advanced Energy and Photonics Applications: A Recent Progress and Innovations

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