scholarly journals Green synthesis of copper oxide nanoparticles using Justicia adhatoda leaf extract and its application in cotton fibers as antibacterial coatings

AIP Advances ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 125223
Author(s):  
Md. Johurul Islam ◽  
M. T. Khatun ◽  
Md. Rezwanur Rahman ◽  
M. M. Alam
Keyword(s):  
Copper Oxide ◽  
Green Synthesis ◽  
Leaf Extract ◽  
Copper Oxide Nanoparticles ◽  
Cotton Fibers ◽  
Oxide Nanoparticles ◽  
Antibacterial Coatings ◽  
Justicia Adhatoda

Green synthesis of copper oxide nanoparticles using Punica granatum leaf extract applied to the removal of methylene blue

2019 ◽  
Vol 257 ◽  
pp. 126685 ◽  
Author(s):  
Taynara Basso Vidovix ◽  
Heloise Beatriz Quesada ◽  
Eduarda Freitas Diogo Januário ◽  
Rosângela Bergamasco ◽  
Angélica Marquetotti Salcedo Vieira
Keyword(s):  
Methylene Blue ◽  
Copper Oxide ◽  
Green Synthesis ◽  
Leaf Extract ◽  
Punica Granatum ◽  
Copper Oxide Nanoparticles ◽  
Oxide Nanoparticles

scholarly journals Green Synthesis and Characterization of Crystalline CuO Nanoparticles using Aqueous Mentha Piperita L. Leaf Extract

2021 ◽  
Vol 20 (2) ◽  
pp. 1-6
Author(s):  
Fatma A. Shtewi ◽  
Wedad M. Al-Adiwish ◽  
Hamid A. Alqamoudy ◽  
Awatif A. Tarroush
Keyword(s):  
Copper Oxide ◽  
Green Synthesis ◽  
Leaf Extract ◽  
Copper Oxide Nanoparticles ◽  
Cuo Nanoparticles ◽  
Mentha Piperita ◽  
Synthesis Process ◽  
Oxide Nanoparticles ◽  
Cuo Nps ◽  
Tauc Plot

Copper oxide nanoparticles are essential technology materials that are utilized as catalysts in the chemical industry, as well as in photonic and electronic devices and medical applications. Due to their applications in advanced technologies, we have concentrated on the production of CuO nanoparticles using enhanced, cost-effective, and environmentally friendly synthetic techniques. In this paper, we have presented a green synthesis technique to successfully synthesis copper oxide nanoparticles (CuO NPs) utilizing copper (II) sulfate pentahydrate (CuSO4.5H2O) as precursor salt and Mentha Piperita leaf extract as a reducing and stabilizing agent during the synthesis process. The precursor salt solution and reducing agent were mixed in a 1:1 volume ratio at 50 °C. The CuO NPs synthesized were confirmed by the characteristics Surface Plasmon Resonance (SPR) peak in the UV-visible region. Also, the optical direct band gap energy of the CuO NPs determined from the Tauc plot was 3.26 eV. The FTIR spectrum analysis confirmed existence of functional groups of polyphenols from Mentha piperita L. leaf extract, which are responsible for the reduction of Cu2+ ions and effective stabilization of CuO NPs. All the peaks observed in the XRD pattern revealed the production of CuO NPs having monoclinic structure with an average crystallite size of 42.51 nm. The surface morphology of the CuO nanoparticles was detected using SEM analysis. Further, the synthesis mechanism of CuO NPs has also been investigated.

scholarly journals Preparation of green synthesized copper oxide nanoparticles for efficient removal of lead from wastewaters

2021 ◽  
Author(s):  
Amir Zarrabi ◽  
Reza Ghasemi-Fasaei
Keyword(s):  
Copper Oxide ◽  
Green Synthesis ◽  
Leaf Extract ◽  
Metal Salt ◽  
Plant Cover ◽  
Equilibrium Concentration ◽  
Copper Oxide Nanoparticles ◽  
Polluted Water ◽  
Oxide Nanoparticles ◽  
Cuo Nps

Abstract Green synthesis is a clean and eco-friendly process in which metal nanoparticles can be produced via reaction between a metal salt solution and plant organ extract. In present study, three copper oxide nanoparticles were synthesized using green synthesis processes from the leaf extracts of selected plants as abundant plant cover in the study area including astragalus (Astragalus membranaceus), rosemary (Salvia rosmarinus) and mallow (Malva sylvestris). The effectiveness of three green synthesized nanoparticles in the adsorption of lead ions from a polluted water was studied under laboratory conditions. According to the results, the removal efficiencies of the copper oxide nanoparticles synthesized from astragalus (A-CuO-NPs), rosemary (R-CuO-NPs) and mallow leaf extract (M-CuO-NPs) especially at the highest initial concentration of Pb (1.5 mM) were 88.4 %, 84.9 % and 69.6 %, respectively. Most probably due the smooth morphology and more uniform configuration of the M-CuO-NPs, the changes between equilibrium adsorption (qe) and equilibrium concentration (Ce) were more regular than those of the A-CuO-NPs and R-CuO-NPs. Accordingly the best fitted data to Langmuir and Freundlich isotherms were observed in the adsorption of Pb onto the M-CuO-NPs. Despite the lowest removal efficiency of the M-CuO-NPs, with the equal volumes of each leaf extract and CuSO4.5H2O solution (20 mM), the most produced dry weight was observed for these nanoparticles (4.3 g per 100 mL of leaf extract). According to the results reported herein, the copper oxide nanoparticles synthesized from different plant covers are efficient adsorption agents for Pb from wastewaters.

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