Investigation of structural and optical properties of NiO nanoparticles mediated by Plectranthus amboinicus leaf extract

Ramesh, R.; Yamini, V.; Sundaram, S. John; Khan, F. Liakath Ali; Kaviyarasu, K.

doi:10.1016/j.matpr.2020.03.581

Cited by 28 publications

(4 citation statements)

References 35 publications

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“…scutellarioides-Cu NCs. , The small peak at 1087 cm –1 is attributed to −C–N stretching in P. scutellarioides-Cu NCs . These findings demonstrated that the typical absorption bands are either weaker or shifted from their initial positions, supporting the idea of the interaction of electron-rich groups present in the extract with Cu atoms in the Cu(OAc) 2 for synthesis of P.…”

Section: Resultsmentioning

confidence: 99%

Biosynthesis of Green-Emissive Copper Nanoclusters from Plectranthus scutellarioides Extract for the Detection of Terbufos in Carrot and Water Samples

Raval,

Mehta,

Jha

et al. 2023

ACS Food Sci. Technol.

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The development of superior sensors that can detect terbufos insecticide in the fields of agriculture and human health is of utmost importance. Herein, green emissive copper nanoclusters (Cu NCs) were fabricated using the extract of Plectranthus scutellarioides (P. scutellarioides) leaves as biological ligands. The synthesized Plectranthus scutellarioides-Cu NCs (P. scutellarioides-Cu NCs) possess green fluorescence (FL) under UV-light and depict excitation-dependent emission behavior at 450 nm showing maximum emission intensity at 510 nm. The dispersive nature and size of the P. scutellarioides-Cu NCs were calculated to be 2.1 ± 0.6 nm using high-resolution transmission electron microscopy (HR-TEM). The as-synthesized P. scutellarioides-Cu NCs are waterdispersive and show good stability. The introduction of terbufos quenched the FL intensity of P. scutellarioides-Cu NCs via a static quenching mechanism. With terbufos concentrations ranging from 0.1 to 4.0 μM, the ratio of I 0 /I of P. scutellarioides-Cu NCs showed a clear linear relationship with a corresponding low detection limit (LOD) of 0.029 μM. The as-synthesized detection methodology was successfully used to analyze terbufos in vegetable (carrot) and water samples with good recovery and relative standard deviation (RSD) values of less than 2. The real-time study was also performed using a paper-strip-based detection method.

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Section: Resultsmentioning

confidence: 99%

Biosynthesis of Green-Emissive Copper Nanoclusters from Plectranthus scutellarioides Extract for the Detection of Terbufos in Carrot and Water Samples

Raval,

Mehta,

Jha

et al. 2023

ACS Food Sci. Technol.

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“…Preliminary investigations for all probable binding affinity with the targeted enzyme and their interactions with the bioactive compounds of C. odorata predicted their theoretical biological data of ten bioactive compounds. The molecular docking study was performed against the bacterial protein dihydrofolate synthetase, PDB ID: 1AD1, 1AJ0, and fungal protein Lanosterol C14 α-Demethylase protein, PDB ID: 5V5Z with bioactive compounds of C. odorata (1)(2)(3)(4)(5)(6)(7)(8)(9)(10). The molecular docking scores and binding interactions of bioactive compounds with protein were shown (Table 2).…”

Section: Molecular Dockingmentioning

confidence: 99%

Unveiling the antibacterial and antifungal potential of biosynthesized silver nanoparticles from Chromolaena odorata leaves

Bishoyi,

Sahoo,

Samal

et al. 2024

Sci Rep

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This research investigates the biogenic synthesis of silver nanoparticles (AgNPs) using the leaf extract of Chromolaena odorata (Asteraceae) and their potential as antibacterial and antifungal agents. Characterization techniques like ultraviolet–visible, Fourier transform infrared (FTIR), Dynamic light scattering and zeta potential (DLS), X-ray diffraction (XRD), transmission electron microscopy (TEM), and field emission scanning electron microscopy and energy-dispersive X-ray spectroscopy (FESEM-EDX) confirmed the formation of spherical (AgNPs). UV–vis spectroscopy reaffirms AgNP formation with a peak at 429 nm. DLS and zeta potential measurements revealed an average size of 30.77 nm and a negative surface charge (− 0.532 mV). Further, XRD analysis established the crystalline structure of the AgNPs. Moreover, the TEM descriptions indicate that the AgNPs are spherical shapes, and their sizes ranged from 9 to 22 nm with an average length of 15.27 nm. The X-ray photoelectron spectroscopy (XPS) analysis validated the formation of metallic silver and elucidated the surface state composition of AgNPs. Biologically, CO-AgNPs showed moderate antibacterial activity but excellent antifungal activity against Candida tropicalis (MCC 1559) and Trichophyton rubrum (MCC 1598). Low MIC values (0.195 and 0.390 mg/mL) respectively, suggest their potential as effective antifungal agents. This suggests potential applications in controlling fungal infections, which are often more challenging to treat than bacterial infections. Molecular docking results validated that bioactive compounds in C. odorata contribute to antifungal activity by interacting with its specific domain. Further research could pave the way for the development of novel and safe antifungal therapies based on biogenic nanoparticles.

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“…The distinctive characteristics of NiO, such as its large energy gap, present exciting opportunities for improving the efficiency and stability of DSSCs. This is attributed to their strong magnetic properties resulting from unbalanced surface spins within the metal oxides [1][2][3][4][5]. Nanostructured NiO is utilized in hightech applications such as smart windows, electrochemical supercapacitors, and desensitized photocathodes.…”

Section: Introductionmentioning

confidence: 99%

Enhanced photocatalytic and electrochemical performance of hydrothermally prepared NiO‐doped Co nanocomposites

Venkatachalapathy,

Sambathkumar,

Rajasaravanan

et al. 2024

Luminescence

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In this study, we synthesize nanostructured nickel oxide (NiO) and doped cobalt (Co) by combining nickel(II) chloride hexahydrate (NiCl2.6H2O) and sodium hydroxide (NaOH) as initial substances. We analyzed the characteristics of the product nanostructures, including their structure, optical properties, and magnetic properties, using various techniques such as x‐ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet absorption spectroscopy (UV–Vis), Fourier transform infrared (FTIR) spectroscopy, and vibrating sample magnetometers (VSM). The NiO nanoparticles doped with Co showed photocatalytic activity in degrading methylene blue (MB) dye in aqueous solutions. We calculated the degradation efficiencies by analyzing the UV–Vis absorption spectra at the dye's absorption wavelength of 664 nm. It was observed that the NiO‐doped Co nanoparticles facilitated enhanced recombination and migration of active elements, which led to more effective degradation of organic dyes during photocatalysis. We also assessed the electrochemical properties of the materials using cyclic voltammetry (CV) and impedance spectroscopy in a 1 mol% NaOH solution. The NiO‐modified electrode exhibited poor voltammogram performance due to insufficient contact between nanoparticles and the electrolyte solution. In contrast, the uncapped NiO's oxidation and reduction cyclic voltammograms displayed redox peaks at 0.36 and 0.30 V, respectively.

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Investigation of structural and optical properties of NiO nanoparticles mediated by Plectranthus amboinicus leaf extract

Cited by 28 publications

References 35 publications

Biosynthesis of Green-Emissive Copper Nanoclusters from Plectranthus scutellarioides Extract for the Detection of Terbufos in Carrot and Water Samples

Biosynthesis of Green-Emissive Copper Nanoclusters from Plectranthus scutellarioides Extract for the Detection of Terbufos in Carrot and Water Samples

Unveiling the antibacterial and antifungal potential of biosynthesized silver nanoparticles from Chromolaena odorata leaves

Enhanced photocatalytic and electrochemical performance of hydrothermally prepared NiO‐doped Co nanocomposites

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