Journal
CHEMICAL PHYSICS LETTERS
Volume 780, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.cplett.2021.138914
Keywords
NiO nanoparticles; Green synthesis; Photocatalyst; Sensor; Antibacteria
Funding
- [001/RE/ChemDept-UII/2021]
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In this study, NiO nanoparticles were successfully synthesized using green methods with Tagetes erecta L leaf extract as the bio-reductor. The nanoparticles demonstrated efficient photocatalytic and electrochemical sensing properties, as well as effective antibacterial activity, particularly against Gram-positive bacteria.
In this study, the green synthesis of NiO nanoparticles (NiO NPs) by using the leaf extract of Tagetes erecta L as the bio-reductor was reported. NiO NPs were synthesized by two methods, viz. microwave irradiation and the reflux method, respectively, and physicochemical properties of the as-formed NiO NPs were characterized by XRD, SEM-EDX, TEM, and XPS analyses. The chemical properties of NiO NPs were evaluated as a photocatalyst for the degradation of methylene blue and as a glucose sensor for electrochemical sensing. Moreover, their biological property was examined as an antibacterial agent. Results revealed that the microwave-assisted green synthesis successfully affords NiO NPs with a particle size of 18.2 nm. In addition, NiO NPs were demonstrated to be an efficient photocatalyst and an effective electrochemical sensor with a degradation efficiency (53% for 120 min) comparable to those reported in similar studies, and the feasibility for glucose analysis was demonstrated by a limit of detection of less than 83 mu M and a sensitivity of 2556.41 mu A. mM(- )1.cm(-2).. From the antibacterial activity test, nanoparticles were found to be effective against Gram-positive and Gram-negative bacteria, with better antibacterial activity toward Gram-positive bacterial strains.
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