scholarly journals Green synthesis of copper oxide nanoparticles using Bougainvillea leaves aqueous extract and antibacterial activity evaluation

2021 ◽  
Author(s):  
CI Chemistry International
Keyword(s):  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Copper Oxide ◽  
Green Synthesis ◽  
Aqueous Extract ◽  
Low Cost ◽  
Copper Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Bacterial Strains ◽  
Cost Efficient

The aim of present study is based on low cost, efficient, non-toxic and eco-friendly method for green synthesis of copper oxide nanoparticles (CuONPs) using Bougainvillea leaves aqueous extract. The green synthesized nanoparticles were subjected to characterization techniques UV–visible spectroscopy (UV–vis), X-ray diffraction (XRD), Fourier transform Infrared spectroscopy (FT-IR) and transmission electron microscope (TEM). The synthesized CuONPs were pure, predominantly spherical with sizes ranges from 8-20 nm. CuONPs showed excellent antimicrobial activity against various bacterial strains Escherichia coli, Enterococcus faecalis, and Staphylococcus aureus. Moreover, E. coli and E. faecalis exhibited the highest sensitivity to CuONPs while Staphylococcus aureus was the least sensitive. Possible mechanisms of antimicrobial activity of CuONPs should be further investigated.

Green Synthesis of Copper Oxide Nanoparticles (CuO NPs) From Aqueous Extract of Seeds of Eletteria Cardamomum and Its Antimicrobial Activity against Pathogens

2020 ◽  
Vol 09 ◽  
Author(s):  
Akshaya Venkatramanan ◽  
Akila Ilangovan ◽  
Pakutharivu Thangarajan ◽  
Anitha Saravanan ◽  
Balachandar M
Keyword(s):  
Antimicrobial Activity ◽  
Copper Oxide ◽  
Green Synthesis ◽  
Aqueous Extract ◽  
Dye Sensitized Solar Cells ◽  
Copper Oxide Nanoparticles ◽  
Diffusion Method ◽  
Oxide Nanoparticles ◽  
Cuo Nps ◽  
Vis Spectroscopy

Background: The Nanomaterials/Nanoparticles are of great interest today because of their small size and large surface area, modular and easily tunable morphology and size. Copper oxide (CuO) nanoparticles are widely used in dye-sensitized solar cells (DSSCs). Research on the synthesis and properties of metallic nanomaterials is a growing field of nanotechnology due to the use of nanoparticles in the scientific, technical, pharmaceutical, and biomedical fields. Green synthesis is an emerging technology for the production of nanoparticles due to its many advantages over traditional physical processes and the method of chemical synthesis. Methods: In this study, we report the cost-effective, long-lasting, stable, and regenerative aqueous extract of Eletteria cardamom seeds to target the synthesis of copper oxide nanoparticles (CuO NPs). This method is completely green, free from toxic and harmful solvents. CuO NPs were synthesized from a cupric nitrate mixture and the aqueous extracts of Eletteria cardamom seeds were kept at room temperature for 24 h. CuO NPs were characterized using UV-visible spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), dynamic light scattering (DLS), and Fourier Transfer infra-red spectroscopy (FTIR) analyzes. UV - Vis spectroscopy revealed the presence of CuO NPs. Results: SEM images stated that the particles were spherical and ranged in size from 1–100nm. FTIR spectra of control (seed extract) and synthesized CuO NPs identify functional groups of active components. In addition, the synthesized CuO NPs were tested for antimicrobial activity by standard disc diffusion method. Conclusion: Nanoparticles found that Escherichia coli and Staphylococcus aureus resistant areas were observed around each well with antimicrobial activity against disease-causing pathogenic strains.

scholarly journals Green Synthesis of Copper Oxide Nanoparticles Using Protein Fractions from an Aqueous Extract of Brown Algae Macrocystis pyrifera

Processes ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 78
Author(s):  
Karla Araya-Castro ◽  
Tzu-Chiao Chao ◽  
Benjamín Durán-Vinet ◽  
Carla Cisternas ◽  
Gustavo Ciudad ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Copper Oxide ◽  
Green Synthesis ◽  
Aqueous Extract ◽  
Brown Algae ◽  
Copper Oxide Nanoparticles ◽  
Macrocystis Pyrifera ◽  
Protein Fractions ◽  
Oxide Nanoparticles ◽  
Cuo Nps

Amongst different living organisms studied as potential candidates for the green synthesis of copper nanoparticles, algal biomass is presented as a novel and easy-to-handle method. However, the role of specific biomolecules and their contribution as reductant and capping agents has not yet been described. This contribution reports a green synthesis method to obtain copper oxide nanoparticles (CuO-NPs) using separated protein fractions from an aqueous extract of brown algae Macrocystis pyrifera through size exclusion chromatography (HPLC-SEC). Proteins were detected by a UV/VIS diode array, time-based fraction collection was carried out, and each collected fraction was used to evaluate the synthesis of CuO-NPs. The characterization of CuO-NPs was evaluated by Dynamic Light Scattering (DLS), Z-potential, Fourier Transform Infrared (FTIR), Transmission Electron Microscope (TEM) equipped with Energy Dispersive X-ray Spectroscopy (EDS) detector. Low Molecular Weight (LMW) and High Molecular Weight (HMW) protein fractions were able to synthesize spherical CuO-NPs. TEM images showed that the metallic core present in the observed samples ranged from 2 to 50 nm in diameter, with spherical nanostructures present in all containing protein samples. FTIR measurements showed functional groups from proteins having a pivotal role in the reduction and stabilization of the nanoparticles. The highly negative zeta potential average values from obtained nanoparticles suggest high stability, expanding the range of possible applications. This facile and novel protein-assisted method for the green synthesis of CuO-NPs may also provide a suitable tool to synthesize other nanoparticles that have different application areas.

scholarly journals Green Synthesis and Evaluation of Copper Oxide Nanoparticles using Fig Leaves and their Antifungal and Antibacterial Activities

2020 ◽  
Vol 10 (03) ◽  
pp. 378-382
Author(s):  
Jenan Hussien Taha ◽  
Nada Khudair Abbas ◽  
Azhar A. F. Al-Attraqchi
Keyword(s):  
Copper Oxide ◽  
Green Synthesis ◽  
Antibacterial Activities ◽  
Copper Oxide Nanoparticles ◽  
Morphological Properties ◽  
Oxide Nanoparticles ◽  
Bacterial Strains ◽  
Tem Analysis ◽  
Cuo Nps ◽  
Transmission Electron

In this article, a simple new technique for the green synthesis of copper oxide nanoparticles (CuO NPs) using peroxidases oxidoreductases (POX) enzyme extracted from fig leaves for antifungal and antibacterial activities has been reported. Subsequently, a comprehensive investigation of the structural, optical, and morphological properties of the synthesized CuO NPs was elucidated, using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Electrodiagnostic (EDX), atomic force microscopy (AFM), and transmission electron microscopy (TEM) analysis techniques. Specifically, the resultant nanoparticles are spherical with a diameter ranging from 28–68. CuO NPs were further tested for their antifungal activity against Candida and Aspergillus species, while the antibacterial activity was screened in contradiction of pathogenic bacterial strains namely gram-positive Staphylococcus aureus and gram-negative Asinobacterial species. The present study reveals a convenient use of POX fig leaves extract as fuel, for the well-organized synthesis of CuO NPs via green synthesis technique to acquire considerably active antifungal and antibacterial materials.

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