Effect on superhydrophobic surfaces on electrical porcelain insulator, improved technique at polluted areas  for longer life and reliability

Ramalla, Isaac; Gupta, Rajeev; Bansal, Kamal

doi:10.14419/ijet.v4i4.5405

Cited by 72 publications

(31 citation statements)

References 21 publications

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“…FTIR examination of pure one-dimensional silica structures reveals two bond types occurring in the chemical structure of SiO 2 nanowires including Si-O-Si and Si-O, which correspond to the following values of the wavenumber: 451, 802, 964, and 1072 cm −1 , respectively. This coincides with the results obtained in the works [ 40 , 41 ]. In addition, the peaks obtained in the FTIR spectrum, which were obtained for bimodal SiO 2 /SiO 2 nanowires, correspond to the bonds present in the chemical structure of the reinforcing phase.…”

Section: Resultssupporting

confidence: 93%

Synthesis of the Novel Type of Bimodal Ceramic Nanowires from Polymer and Composite Fibrous Mats

Tański

Matysiak

2018

Nanomaterials

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The purpose of this paper was to produce SiO2 and TiO2 nanowires via the electrospinning process from a polyvinylpyrrolidone (PVP)/Tetraethyl orthosilicate (TEOS)/Titanium (IV) butoxide (TNBT)/dimethylformamide (DMF) and ethanol (EtOH) solution. The as-obtained nanofibers were calcined at temperatures ranging from 400 °C to 600 °C in order to remove the organic phase. The one-dimensional ceramic nanostructures were studied using a scanning electron microscope (SEM) and a transmission electron microscope (TEM) to analyze the influence of the used temperature on the morphology and structures of the obtained ceramic nanomaterials. In order to examine the chemical structure of the nanowires, energy dispersive spectrometry (EDX) and Fourier-Transform Infrared spectroscopy (FTIR) were used. The optical property analysis was performed on the basis of UV-Vis spectra of absorbance as a function of the wavelength. Using the modified Swanepoel method, which the authors proposed and the recorded absorbance spectra allowed to determine the banded refractive index n, real n′ and imaginary k part of the refractive index as a function of the wavelength, complex dielectric permeability ε, and real and imaginary part εr and εi of the dielectric permeability as a function of the radiation energy of the produced ceramic nanowires.

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Section: Resultssupporting

confidence: 93%

Synthesis of the Novel Type of Bimodal Ceramic Nanowires from Polymer and Composite Fibrous Mats

Tański

Matysiak

2018

Nanomaterials

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“…For SiO 2 -Ag, there is a broad band located near 3400 cm −1 and another located at 1627 cm −1 , both corresponding to the O–H stretching of water and the formed silanol groups (Si–OH), respectively [ 92 , 93 ]. The bands observed at 1100 and 475 cm −1 , on the other hand, are attributed to symmetrical stretching and bending of Si–O–Si bonds, respectively [ 92 , 94 , 95 ]. The peaks located at 950 and 845 cm −1 indicate the bending of the O–Si–O moiety [ 80 , 95 ].…”

Section: Resultsmentioning

confidence: 99%

SiO2-Ag Composite as a Highly Virucidal Material: A Roadmap that Rapidly Eliminates SARS-CoV-2

et al. 2021

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COVID-19, as the cause of a global pandemic, has resulted in lockdowns all over the world since early 2020. Both theoretical and experimental efforts are being made to find an effective treatment to suppress the virus, constituting the forefront of current global safety concerns and a significant burden on global economies. The development of innovative materials able to prevent the transmission, spread, and entry of COVID-19 pathogens into the human body is currently in the spotlight. The synthesis of these materials is, therefore, gaining momentum, as methods providing nontoxic and environmentally friendly procedures are in high demand. Here, a highly virucidal material constructed from SiO2-Ag composite immobilized in a polymeric matrix (ethyl vinyl acetate) is presented. The experimental results indicated that the as-fabricated samples exhibited high antibacterial activity towards Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) as well as towards SARS-CoV-2. Based on the present results and radical scavenger experiments, we propose a possible mechanism to explain the enhancement of the biocidal activity. In the presence of O2 and H2O, the plasmon-assisted surface mechanism is the major reaction channel generating reactive oxygen species (ROS). We believe that the present strategy based on the plasmonic effect would be a significant contribution to the design and preparation of efficient biocidal materials. This fundamental research is a precedent for the design and application of adequate technology to the next-generation of antiviral surfaces to combat SARS-CoV-2.

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“…SEM and TEM images of the SiO 2 and TiO 2 nanoparticles showed average diameters of 75.1 and 113.5 nm, respectively. PL, UV-vis absorbance and FT-IR spectra of the sterilized SiO 2 and TiO 2 nanoparticles showed that the spectroscopic properties of the nanoparticles did not significantly change from previously reported data after the sterilization processes [31][32][33]. After the characterization of the sterilized SiO 2 and TiO 2 nanoparticles, 2D and 3D human normal colon fibroblast CCD-18Co cells were used to monitor their cytotoxicity.…”

Section: Discussionmentioning

confidence: 81%

Toxicity Assessment of SiO2 and TiO2 in Normal Colon Cells, In Vivo and in Human Colon Organoids

et al. 2020

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We conducted systemic assessments on the toxicity of silicon dioxide (SiO2) and titanium dioxide (TiO2) nanoparticles using different forms of normal colon cells (CCD-18Co), in vivo and in human colon organoids. The in vivo acute oral toxicity data showed that the LD50 values are greater than 2000 mg/kg for both the SiO2 and TiO2 nanoparticles; however, the SiO2 and TiO2 nanoparticles induced cytotoxicity in two-dimensional CCD-18Co cells and three-dimensional CCD-18Co spheroids and human colon organoids, with IC50 values of 0.6, 0.8 and 0.3 mM for SiO2 and 2.5, 1.1 and 12.5 mM for TiO2 nanoparticles, respectively. The data suggest that, when SiO2 and TiO2 are in nanoparticle form, cytotoxicity is induced; thus, care should be taken with these materials.

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Effect on superhydrophobic surfaces on electrical porcelain insulator, improved technique at polluted areas for longer life and reliability

Cited by 72 publications

References 21 publications

Synthesis of the Novel Type of Bimodal Ceramic Nanowires from Polymer and Composite Fibrous Mats

Synthesis of the Novel Type of Bimodal Ceramic Nanowires from Polymer and Composite Fibrous Mats

SiO2-Ag Composite as a Highly Virucidal Material: A Roadmap that Rapidly Eliminates SARS-CoV-2

Toxicity Assessment of SiO2 and TiO2 in Normal Colon Cells, In Vivo and in Human Colon Organoids

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