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R. Preethi

Bio: R. Preethi is an academic researcher from Alagappa University. The author has an hindex of 2, co-authored 2 publications receiving 40 citations.

Papers
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Journal ArticleDOI
K. Velsankar1, R M Aswin Kumar1, R. Preethi1, V Muthulakshmi1, S. Sudhahar1 
TL;DR: In this paper, the green synthesis of CuO nanoparticles was synthesized by Allium sativum extract and the powder X-ray diffraction pattern explained the high crystalline nature and the calculated crystallite size in 25−35'nm.
Abstract: The green synthesis of CuO nanoparticles was synthesized by Allium sativum extract. The powder X-ray diffraction pattern explained the high crystalline nature and the calculated crystallite size in 25−35 nm. The Fourier transform infrared spectrum described the CuO bonding nature. The UV visible analysis reported the surface Plasmon resonance band at 398 nm. The Photoluminescence spectrum denoted the red band emission in the visible region. The particle size analyzer displayed the CuO nanoparticles in a 20−40 nm range of size. The SEM images manifested the spherical, oval-shaped morphology of CuO nanoparticles. The EDAX spectrum and mapping proved the purity of CuO with Cu and O occurrence. The HRTEM images confirmed the crystalline nature formation of CuO nanoparticles. The phytochemical analysis listed the phytochemicals contributed for CuO nanoparticle synthesis via Allium sativum extract. The antimicrobial activity reported the efficient infection on bacteria as well as fungi. The antioxidant activity demonstrated the potential ability of free radical scavenging activity. The potential anti-inflammatory activity against egg albumin has obtained. The anti larvicidal activity showed the notable potential nature of affection on Anopheles subpictus mosquito larvae. At 21st century, CuO nanoparticles from environment friendly synthesis have special efficient applications in drugs, optics, batteries, gas sensors, catalysts, cosmetics, and semiconductor applications. Moreover, CuO nanoparticles have future applications in formulating the drug for human life-threatening diseases and various dangerous cancer treatments.

96 citations

Journal ArticleDOI
K. Velsankar1, R. Preethi1, P.S. Jeevan Ram1, M. Ramesh1, S. Sudhahar1 
TL;DR: In this paper, a phytochemical analysis of Allium sativum flower extract provides the phytochemicals exist in it and the formation of spherical shaped Ag nanoparticles was confirmed by the appearance of Ag peak in Energy Dispersive X-ray Diffraction spectrum and mapping study.
Abstract: The eco-friendly phytomediated synthesis of Ag nanoparticles provides better efficient applications than synthetic methods. Ag nanoparticles are considered by researchers due to its specific properties. The phytochemical analysis of Allium Sativum flower extract provides the phytochemicals exist in it. Due to this, the efficient eco-friendly synthesis of Ag nanoparticles via Allium Sativum flower extract has performed. The X-ray diffraction pattern exposes the crystalline nature with the mean crystallite size at 25 nm. The Fourier Transform Infra-Red spectrum displays the phytochemicals involved in the synthesis. The UV–Visible spectrum illustrates the formation of Ag nanoparticles with SPR band at 436 nm. The particle size analyzer demonstrates the size of formed Ag particles in 20–35 nm. The morphological, elemental and structural analyzes demonstrate the formation of spherical shaped Ag nanoparticles. The formation of Ag nanoparticles was confirmed by the appearance of Ag peak in Energy Dispersive X-ray Diffraction spectrum and mapping study. The antimicrobial activity explains the effective antimicrobial effect on human pathogens. The antioxidant activity reports the efficient scavenging property of synthesized Ag nanoparticles. The anti-inflammatory activity reveals the potential ability of protein denaturation on bovine serum albumin. The anti-diabetic activity exhibits much inhibition on α-Amylase. The anticancer activity reports the effective inhibition of synthesized Ag nanoparticles on human MCF-7 breast cancer cells.

27 citations


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TL;DR: In this article , the current state of the art and potential challenges in the green synthesis of CuO NPs are described and a thorough explanation of green synthesis and stabilizing agents for CuONPs made from these green sources is given.
Abstract: Copper oxide nanoparticles (CuO NPs) are one of the most widely used nanomaterials nowadays. CuO NPs have numerous applications in biological processes, medicine, energy devices, environmental remediation, and industrial fields from nanotechnology. With the increasing concern about the energy crisis and the challenges of chemical and physical approaches for preparing metal NPs, attempts to develop modern alternative chemistry have gotten much attention. Biological approaches that do not produce toxic waste and therefore do not require purification processes have been the subject of numerous studies. Plants may be extremely useful in the study of biogenic metal NP synthesis. This review aims to shed more light on the interactions between plant extracts and CuO NP synthesis. The use of living plants for CuO NPs biosynthesis is a cost-effective and environmentally friendly process. To date, the findings have revealed many aspects of plant physiology and their relationships to the synthesis of NPs. The current state of the art and potential challenges in the green synthesis of CuO NPs are described in this paper. This study found a recent increase in the green synthesis of CuO NPs using various plant extracts. As a result, a thorough explanation of green synthesis and stabilizing agents for CuO NPs made from these green sources is given. Additionally, the multifunctional applications of CuO NPs synthesized with various plant extracts in environmental remediation, sensing, catalytic reduction, photocatalysis, diverse biological activities, energy storage, and several organic transformations such as reduction, coupling, and multicomponent reactions were carefully reviewed. We expect that this review could serve as a useful guide for readers with a general interest in the plant extract mediated biosynthesis of CuO NPs and their potential applications.

109 citations

Journal ArticleDOI
TL;DR: In this paper, the current state of the art and potential challenges in green synthesis of CuO NPs are described and a thorough explanation of green synthesis and stabilizing agents for CuONPs made from these green sources is given.

108 citations

Journal ArticleDOI
TL;DR: The results indicated that the proactive eco-benign fabrication of CuONPs by sustainable “green chemistry” approaches can offer a convenient alternative to orthodox multi-step strategies for the creation ofCuONPs.
Abstract: Herein, we report the eco-benevolent fabrication of copper oxide nanoparticles (CuONPs) by a green process using Polyalthia longifolia leaf extract (PLLE). Phytochemical screening for the PLLE evinced the existence of tannins, terpenoids, saponins, phenols, glycosides, and flavonoids. The produced CuONPs were explored by using XRD, zeta potential, DLS, EDAX, HRTEM, BET-surface area, UV-DRS, photoluminescence, and FTIR to ascertain its structural, morphological, and optical properties. Besides, these CuONPs evinced noteworthy bactericidal performance against Pseudomonas aeruginosa (P. aeruginosa), Staphylococcus aureus (S. aureus), Escherichia coli (E. coli), Streptococcus pyogenes (S. pyogenes), and good antifungal performance against Aspergillus niger (A. niger), Epidermophyton floccosum (E. floccosum), Aspergillus clavatus (A. clavatus), and Candida albicans (C. albicans). The results indicated that the proactive eco-benign fabrication of CuONPs by sustainable “green chemistry” approaches can offer a convenient alternative to orthodox multi-step strategies for the creation of CuONPs.

58 citations

Journal ArticleDOI
12 Apr 2021
TL;DR: In this article, the authors present an overview and current update of plant-mediated Cu/copper oxide (CuO) NPs, including their synthesis, medicinal applications, and mechanisms.
Abstract: Plants are rich in phytoconstituent biomolecules that served as a good source of medicine. More recently, they have been employed in synthesizing metal/metal oxide nanoparticles (NPs) due to their capping and reducing properties. This green synthesis approach is environmentally friendly and allows the production of the desired NPs in different sizes and shapes by manipulating parameters during the synthesis process. The most commonly used metals and oxides are gold (Au), silver (Ag), and copper (Cu). Among these, Cu is a relatively low-cost metal that is more cost-effective than Au and Ag. In this review, we present an overview and current update of plant-mediated Cu/copper oxide (CuO) NPs, including their synthesis, medicinal applications, and mechanisms. Furthermore, the toxic effects of these NPs and their efficacy compared to commercial NPs are reviewed. This review provides an insight into the potential of developing plant-based Cu/CuO NPs as a therapeutic agent for various diseases in the future.

56 citations

Journal ArticleDOI
TL;DR: In this article , the green synthesis of nanoparticles were performed using Erythrina variegata leaf extract as capping and stabilizing agent whereas for comparative analysis chemical synthesis was carried out using sodium hydroxide as reducing agent.

36 citations