In-situ synthesis and attachment of colloidal ZnO nanoparticles inside porous carbon structures

Motoc, Adrian Mihail; Tudor, Ioan Albert; Petriceanu, Mirela; Bădiliţă, Viorel; Barrio, Elena Palomo del; Jana, Prasanta; Fierro, Vanessa; Celzard, Alain; Piticescu, Radu Robert

doi:10.1016/j.matchemphys.2015.05.039

Cited by 10 publications

(4 citation statements)

References 21 publications

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“…Nanostructured zinc oxide coating, developing multi-textured flower-like habit on the carbon surface, is a good candidate for drastic reduction of contact angle and surface energy [31]. Hydrothermal-electrochemical method has been successfully used to obtain ZnO nanostructured coatings on porous carbon materials [32]. DSC-TG method (Fig.…”

Section: Hybrid Inorganic-organic Coatingsmentioning

confidence: 99%

A review on differential scanning calorimetry as a tool for thermal assessment of nanostructured coatings

et al. 2021

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Nanostructured coatings and films play an important role in modern surface engineering due to their ability to improve and optimize materials behavior under different external constraints such as high/low temperatures, stress/strain, corrosive/oxidizing atmosphere, electromagnetic fields/fluxes etc., used practically in all industrial fields. Surface modification may be done using any type of materials: polymers, metals, ceramics, composites or hybrids on any type of substrate by different physical, chemical or combined technologies. Thermal characterization methods are one of the most accessible tools to study, model and predict the process parameters required to preserve the nanostructures during thermal treatment of different coatings, develop novel multi-material coating systems, study the complex correlations between material properties vs. synthesis and processing parameters in real environments. Differential Scanning Calorimetry (DSC) is often used as a standard method to put in evidence different thermal events such as phase transitions, decomposition, oxidation/reduction, nucleation and growth at the substrate/coating interfaces or in coating materials. The present paper aims to review some examples on how DSC may be used to assess the thermal behavior of coatings using standardization tools and developing novel application fields.

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Section: Hybrid Inorganic-organic Coatingsmentioning

confidence: 99%

A review on differential scanning calorimetry as a tool for thermal assessment of nanostructured coatings

et al. 2021

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“…The use of nanostructured ZnO aims to enhance the thermal transfer due to the formation of flower-like structures with high specific surface and good chemical compatibility with CNT because of negative charges of hydroxylated zinc species formed on the surface in hydrothermal conditions, as previously demonstrated in [58].…”

Section: Introductionmentioning

confidence: 98%

Development of 3D ZnO-CNT Support Structures Impregnated with Inorganic Salts

et al. 2022

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Carbon-based materials are promising candidates for enhancing thermal properties of phase change materials (PCMs) without lowering its energy storage capacity. Nowadays, researchers are trying to find a proper porous structure as PCMs support for thermal energy storage applications. In this context, the main novelty of this paper consists in using a ZnO-CNT-based nanocomposite powder, prepared by an own hydrothermal method at high pressure, to obtain porous 3D printed support structures with embedding capacity of PCMs. The morphology of 3D structures, before and after impregnation with three PCMs inorganic salts (NaNO3, KNO3 and NaNO3:KNO3 mixture (1:1 vol% saturated solution) was investigated by scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM-EDX). For structure impregnated with nitrates mixture, SEM cross-section morphology suggest that the inorganic salts impregnation started into micropores, continuing with the covering of the 3D structure surface and epitaxial growing of micro/nanostructured crystals, which led to reducing the distance between the structural strands. The variation of melting/crystallization points and associated enthalpies of impregnated PCMs and their stability during five repeated thermal cycles were studied by differential scanning calorimetry (DSC) and simultaneous DSC-thermogravimetry (DSC-TGA). From the second heating-cooling cycle, the 3D structures impregnated with NaNO3 and NaNO3-KNO3 mixture are thermally stable.

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“…To obtain antibacterial properties, oxides such as ZnO, CaO, MgO or Ag 2 O are added to the composition of the gels [ 11 , 12 , 13 , 14 , 15 , 16 ]. Many papers have reported antibacterial properties of ZnO-containing nanomaterials [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. Tatar [ 20 ] reported obtaining of antibacterial transparent thin films containing different amounts of silver ion on the glass substrate.…”

Section: Introductionmentioning

confidence: 99%

Effect of ZnO on Properties of Gels for Heritage Objects Conservation

Mocioiu

Atkinson

Mocioiu

et al. 2021

Gels

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One of the current research objectives is the development of new films for the conservation of glass heritage objects. The value of historical glass objects is given by the technology and raw materials used in production as well as their transparency and color. Their colors are correlated with oxide composition rich in transitional metals, which decrease resistance of corrosive agents from the atmosphere. In this paper, SiO2-ZnO gels have been designed to protect historical glass objects. The sol–gel method used to obtain gels is a powerful tool for functionalizing different materials. An important functionalization is the antibacterial activity. By applying a gel, the coated material is able to decrease the growth of bacteria. After deposition, some gels must be strengthened by heat treatment. The effect of ZnO content (10 mol% and 20 mol%) on the properties of the studied gels was investigated by Differential scanning calorimetry (DSC), Fourier transform infrared (FTIR), X-ray diffraction (XRD), Scanning electron microscopy (SEM), and antibacterial tests. Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 25923, and the halotolerant bacterium, Virgibacillus halodenitrificans, isolated from a salt crystal from Unirea mine, Slănic Prahova, Romania, were used. The gel Gel 2 (SiO2-ZnO (20 mol%)) showed the best properties.

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In-situ synthesis and attachment of colloidal ZnO nanoparticles inside porous carbon structures

Cited by 10 publications

References 21 publications

A review on differential scanning calorimetry as a tool for thermal assessment of nanostructured coatings

A review on differential scanning calorimetry as a tool for thermal assessment of nanostructured coatings

Development of 3D ZnO-CNT Support Structures Impregnated with Inorganic Salts

Effect of ZnO on Properties of Gels for Heritage Objects Conservation

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