The electrochemical behavior, antifungal and cytotoxic activities of phytofabricated MgO nanoparticles using Withania somnifera leaf extract

Raveesha, H. R.; Nayana, S.; Vasudha, D.R.; Begum, J.P. Shabaaz; Pratibha, S.; Ravikumara, C.R.; Dhananjaya, N.

doi:10.1016/j.jsamd.2019.01.003

Cited by 44 publications

(30 citation statements)

References 27 publications

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“…The band at ~670 cm −1 , which confirms the presence of bonds derived from Mg-O stretching vibrations, is also important in terms of FTIR analysis of pure MgO. The spectrum is consistent with the data presented in the literature [21,22].…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)supporting

confidence: 89%

Functional MgO–Lignin Hybrids and Their Application as Fillers for Polypropylene Composites

et al. 2020

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Inorganic–organic hybrids are a group of materials that have recently become the subject of intense scientific research. They exhibit some of the specific properties of both highly durable inorganic materials (e.g., titanium dioxide, zinc) and organic products with divergent physicochemical traits (e.g., lignin, chitin). This combination results in improved physicochemical, thermal or mechanical properties. Hybrids with defined characteristics can be used as fillers for polymer composites. In this study, three types of filler with different MgO/lignin ratio were used as fillers for polypropylene (PP). The effectiveness of MgO-lignin binding was confirmed using Fourier transform infrared spectroscopy. The fillers were also tested in terms of thermal stability, dispersive-morphological properties as well as porous structure. Polymer composites containing 3 wt.% of each filler were subjected to wide angle X-ray diffraction tests, differential scanning calorimetry and microscopic studies to define their structure, morphology and thermal properties. Additionally, tensile tests of the composites were performed. It was established that the composition of the filler has a significant influence on the crystallization of polypropylene—either spherulites or transcrystalline layers were formed. The value of Young’s modulus and tensile strength remained unaffected by filler type. However, composites with hybrid fillers exhibited lower elongation at break than unfilled polypropylene.

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Section: Fourier Transform Infrared Spectroscopy (Ftir)supporting

confidence: 89%

Functional MgO–Lignin Hybrids and Their Application as Fillers for Polypropylene Composites

et al. 2020

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“…Besides presenting the typical bands of PCL, the PCL/TiO 2 NPs spectrum also demonstrates the presence of a new band in this region, confirming successful incorporation of TiO 2 NPs onto PCL membranes [36,37]. The spectrum of commercial MgO NPs shows a band around 800-400 cm −1 , which corresponds to Mg-O stretching vibrations [31,[38][39][40]. The appearance of the band in the region of 800-400 cm −1 in the spectrum of PCL/MgO NPs fibers is observed, confirming the presence of these NPs into the PCL membranes' surface.…”

Section: Eds Atr-ftir Gsdr and Tga Analysesmentioning

confidence: 78%

Antibacterial and Biodegradable Electrospun Filtering Membranes for Facemasks: An Attempt to Reduce Disposable Masks Use

et al. 2021

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Due to the prevalence of the COVID-19 pandemic, the demand for disposable facemasks has become a global issue. Unfortunately, the use of these products has negative effects on the environment, and therefore, the use of biodegradable materials is a powerful strategy to overcome this challenge. Aligned with this concept, in this work, biodegradable facemasks were developed using poly(ε-caprolactone) (PCL) polymer and cotton natural fibers. The filter layer was produced using an electrospinning technique, since electrospun membranes present remarkable characteristics for air filtration. The electrospun membranes were functionalized with different nanoparticles (NPs), including silver (Ag), titanium dioxide (TiO2) and magnesium oxide (MgO), in order to include new properties, namely antibacterial effect. The developed membranes were characterized by FESEM, EDS, ATR-FTIR, GSDR and TGA, which confirmed the successful impregnation of NPs onto PCL membranes. The antibacterial effect and filtration efficiency were assessed, with the PCL/MgO NPs membrane presenting better results, showing inhibition zone diameters of 25.3 and 13.5 mm against Gram-positive and Gram-negative bacteria, respectively, and filtration efficiency of 99.4%. Three facemask prototypes were developed, and their filtration efficiency, air permeability and thermal comfort were evaluated. Overall, this study demonstrates the potential of PCL/NPs electrospun membranes to act as an active and biodegradable filter layer in facemasks.

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“…The Nyquist plot consists of a high-frequency region denoted by a semicircle which represents the transfer of charges occurring at the electrode/electrolyte interface and a low-frequency region signified by a straight line representing the capacitance of electrodes. The charge transfer resistance Rct can be directly measured as the diameter of the semicircle arc on the real axis [23][24][25]. The smaller diameter of the semicircle arc represents a lower Rct value for the sample.…”

Section: Electrochemical Impedance Analysismentioning

confidence: 99%

Synthesis and Characterization of Green CuO using Centella Asiatica Plant Leaf Extract: Electrochemical and Photocatalytic Activities

Rudresha¹,

Hussain²,

Ravikumar³

et al. 2020

Adv. Mater. Lett.

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The electrochemical behavior, antifungal and cytotoxic activities of phytofabricated MgO nanoparticles using Withania somnifera leaf extract

Cited by 44 publications

References 27 publications

Functional MgO–Lignin Hybrids and Their Application as Fillers for Polypropylene Composites

Functional MgO–Lignin Hybrids and Their Application as Fillers for Polypropylene Composites

Antibacterial and Biodegradable Electrospun Filtering Membranes for Facemasks: An Attempt to Reduce Disposable Masks Use

Synthesis and Characterization of Green CuO using Centella Asiatica Plant Leaf Extract: Electrochemical and Photocatalytic Activities

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