scholarly journals Solanum Nigrum Leaf Extract Capped Copper Oxide Nanoparticles and its Tetrahedral L2Cu(ɳ2-BH4) Complex for Effective Degradation of Congo Red

2021 ◽  
Author(s):  
Kijay Bahadur Singh ◽  
Neelam Gautam ◽  
Deen Dayal Upadhyay ◽  
Gulam Abbas ◽  
Gajanan Pandey
Keyword(s):  
Copper Oxide ◽  
Surface Area ◽  
Congo Red ◽  
Leaf Extract ◽  
Copper Oxide Nanoparticles ◽  
Solanum Nigrum ◽  
Oxide Nanoparticles ◽  
Cuo Nps ◽  
Uv Visible ◽  
Positively Charged

Abstract In this work, we reported the green synthesis of Solanum nigrum extract capped copper oxide nanoparticles (SN@CuO NPs) at room temperature, avoiding harsh, toxic, and environment unfriendly chemicals. The synthesized SN@CuO NPs, were analyzed with the help of spectroscopic techniques. UV-visible spectroscopy confirmed the synthesis of SN@CuO NPs in reaction mixture while fourier transform infrared spectroscopy (FTIR) results revealed capping of phytochemicals of Solanum nigrum over the surface of CuO NPs. Morphology and elemental composition of formed SN@CuO NPs were explored with the help of FE-SEM, TEM, and EDS, respectively. Crystalline nature, surface charge and specific surface area was characterized using XRD pattern, DLS and BET analyses, respectivley. The data obtained from spectroscopic analyses specified the formation of mesoporous, positively charged and highly stabilized CuO nanoparticles due to adsorption of phytochemicals present in Solanum nigrum leaf extract on the CuO nanoparticle’s surface. SN@CuO NPs have shown promising catalytic activity towards reduction of highly carcinogenic dye Congo red making use of sodium borohydride. Negatively charged reactants like anionic Congo red molecules and BH4− ions eagerly adsorbed on positively charged, small sizes (5–6 nm), mesoporous SN@CuO NPs surface having wide surface area. It is proposed that BH4− ions interacted with SN@CuO NPs to form Cu tetrahydroborates dihydrogen bonded (DHB) tetrahedral L2Cu(ɳ2-BH4) complex, which is proved as an effective reducing agent. This complex acts as dihydrogen source for rapid reduction of azo bond. UV-visible, FTIR, 1H NMR, 13C NMR, and LC-MS studies of reaction mixture at different reaction stages have shown that the major degradation intermediates were benzidine and α-naphthol. The apparent rate constants for the products at intermediate and final degradation stages have been found to be 0.468 min− 1 and 0.0189 min− 1, respectively. A plausible degradation mechanism for Congo red reduction has also been proposed in this study.

scholarly journals Green Synthesis of Copper Oxide Nanoparticles Using Aerva javanica Leaf Extract and Their Characterization and Investigation of In Vitro Antimicrobial Potential and Cytotoxic Activities

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Fozia Amin ◽  
Fozia ◽  
Baharullah Khattak ◽  
Amal Alotaibi ◽  
Muhammad Qasim ◽  
...  
Keyword(s):  
Copper Oxide ◽  
Fungal Pathogens ◽  
Leaf Extract ◽  
Antimicrobial Activities ◽  
Copper Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Antimicrobial Potential ◽  
Cuo Nps

The development of green technology is creating great interest for researchers towards low-cost and environmentally friendly methods for the synthesis of nanoparticles. Copper oxide nanoparticles (CuO-NPs) attracted many researchers due to their electric, catalytic, optical, textile, photonic, monofluid, and pharmacological activities that depend on the shape and size of the nanoparticles. This investigation aims copper oxide nanoparticles synthesis using Aerva javanica plant leaf extract. Characterization of copper oxide nanoparticles synthesized by green route was performed by three different techniques: X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR) Spectroscopy, and Scanning Electron Microscopy (SEM). X-ray diffraction (XRD) reveals the crystalline morphology of CuO-NPs and the average crystal size obtained is 15 nm. SEM images showed the spherical nature of the particles and size is lying in the 15–23 nm range. FTIR analysis confirms the functional groups of active components present in the extract which are responsible for reducing and capping agents for the synthesis of CuO-NPs. The synthesized CuO-NPs were studied for their antimicrobial potential against different bacterial as well as fungal pathogens. The results indicated that CuO-NPs show maximum antimicrobial activities against all the selected bacterial and fungal pathogens. Antimicrobial activities of copper oxide nanoparticles were compared with standard drugs Norfloxacin and amphotericin B antibiotics. Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of copper oxide nanoparticles were 128 μg/mL against all selected bacterial pathogens. MIC of fungus and minimum fungicidal concentration (MFC) of CuO-NPs were 160 μg/mL. Thus, CuO-NPs can be utilized as a broad-spectrum antimicrobial agent. The cytotoxic activity of the synthesized CuO-NPs suggested that toxicity was negligible at concentrations below 60 μg/mL.

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 Green Synthesis of Copper Oxide Nanoparticles Using Coix lacryma jobi Leaves Extract and Screening of its Potential Anticancer Activities

2021 ◽  
pp. 128-139
Author(s):  
Ksh. Sangeeta Devi ◽  
Atom Rajiv Singh ◽  
D. Velmurugan ◽  
M. Damayanti Devi ◽  
Deepak Singh Lourembam ◽  
...  
Keyword(s):  
Copper Oxide ◽  
Copper Chloride ◽  
Copper Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Visible Spectroscopy ◽  
Anticancer Activities ◽  
Chloride Dihydrate ◽  
Cuo Nps ◽  
Uv Visible

Background: Copper oxide nanoparticles(CuO NPs) have been powerful evidence in several in vitro studies such as cytotoxicity and antimicrobial compared with other metal oxide. Here, we have synthesized green CuO NPs using Coix lacryma jobi leaves extracts. Place and Duration of Study: Department of Chemistry  Manipur University, Manipur, India and Regional Institute of Medical Sciences, Imphal, India between February 2019 to March 2021. Methodology: Green CuO NPs nanoparticles were synthesized from Copper chloride dihydrate (CuCl2.2H2O) using Coix lacryma jobi leaves extract, and the synthesized green CuO NPs were characterized using Field Emission Scanning Electron Microscopy (FESEM) - Energy Dispersive Spectroscopy, IR Spectroscopy, UV-Visible Spectroscopy, Powder X-Ray diffraction Spectroscopy and HR-TEM where FESEM-EDS determined the purity of CuO NPs. Results: No other impurities present were observed in EDS, and the PXRD spectra show the crystallite size of CuO NPs with respect to the (002) plane is found to be 25.2 nm, and the presence of CuO NPs at adsorption spectrum with a distinct peak at 282 nm was determined by  UV-Visible spectroscopy and the homogenous morphology and crystalline nature of the CuO NPs were determined from TEM micrograph and SAED pattern. In applications, the substantial anticancer activity of green CuO NPs (synthesized using Coix lacryma jobi leaves extract) was proved on human cervical and lung cancer cell lines with IC50 values of 31.88 μg/ml and 15.61 μg/ml, respectively.

scholarly journals Adsorption of Congo Red (Acid Red 28) Azodye on Biosynthesized Copper Oxide Nanoparticles

2019 ◽  
Vol 31 (3) ◽  
pp. 707-713 ◽  
Author(s):  
Madiha Batool ◽  
Muhammad Zahid Qureshi ◽  
Farwa Hashmi ◽  
Nida Mehboob ◽  
Walid M. Daoush
Keyword(s):  
Copper Oxide ◽  
Congo Red ◽  
Leaf Extract ◽  
Dye Removal ◽  
Copper Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Average Particle ◽  
Aloe Barbadensis ◽  
Congo Red Dye ◽  
Red Dye

A green synthesis of copper oxide nanoparticles and its removal efficiency of azodye were studied. Biosynthesis of stable copper oxide nanoparticles were preformed using Aloe barbadensis leaf extract as a size and shape-directing agent for preparing of spherical copper oxide nanoparticles by calcination at 400 °C. The leaf extract of Aloe barbadensis was prepared in deionized water. The produced copper particles were calcined at 400 °C to produce copper oxide nanoparticles. The characterization of copper oxide nanoparticles was performed by XRD, SEM, FTIR, UV spectroscopy. The XRD analysis showed that the average particle size was between 5-30 nm. The shape of the copper oxide nanoparticles was spherical and cubic. EDX of the synthesized nanoparticles showed the composition consists of 68 % copper. The UV-visible spectrum analysis confirms an absorption peak at 200-400 nm of the produced CuO nanoparticles. The FTIR analysis of the copper oxide particles indicate the presence of the organometallic Cu-O bond between Cu and O. The obtained copper oxide was used as a removing agent of Congo red dye. The effect of variables like concentration, time, pH, adsorbent dosage were studied. It was observed from the results that the maximum dye removal occurs at pH of 4, the concentration of nanoparticles was 1 mg/L and the maximum time for dye removal was 120 min. The Langmuir isotherm model was calculated to study the adsorption efficiency of the Congo red dye on the produced copper oxide nanoparticles. The kinetics of pseudo second order is followed by adsorption. The calculated sum of square was 0.012 and r2 = 0.98. it was observed that the model fit the best and straight line with r2 value of 0.991 and probability value of 1.6E-5. The nanoparticles remove 70 % of the Congo red dye from its solution. This showed that the copper oxide nanoparticles has efficient capacity of azodye degradation.

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.

scholarly journals Green synthesis of copper oxide nanoparticles using Juglans regia leaf extract and assessment of their physico-chemical and biological properties

2019 ◽  
Vol 8 (1) ◽  
pp. 557-567 ◽  
Author(s):  
Marjan Asemani ◽  
Navideh Anarjan
Keyword(s):  
Antioxidant Activity ◽  
Particle Size ◽  
Copper Oxide ◽  
Leaf Extract ◽  
Copper Oxide Nanoparticles ◽  
Copper Salt ◽  
Oxide Nanoparticles ◽  
Furnace Temperature ◽  
Cuo Nps ◽  
Synthesis Parameters

Abstract Copper oxide nanoparticles (CuO NPs) were green synthesized using walnut leaf extract. Effects of three synthesis parameters namely; amount copper salt (1-4 g), amount of walnut leaf extract (10-40 mL) and furnace temperature (300-500°C), on the particle size as manifested in broad absorption peak (λmax, nm), concentration (absorbance), antioxidant activity and antibacterial activity as minimum inhibitory concentration (MIC) of the fabricated CuO NPs were studied using response surface methodology, based on Box behnken experimental design. The spherical and crystalline monodispersed fabricated CuO NPs with mean particle size of 80 nm, were achieved using optimum synthesis parameters including 1 g copper salt, 14 mL walnut leaf extract and 490°C of furnace temperature. The fabricated CuO NPs at these conditions had maximum antioxidant activity of 83.64% and minimum MIC value of 1.78% w/v against E. coli, with λmax and absorbance values of 226 nm, 4.44% a.u., respectively.

scholarly journals SYNTHESIS AND CHARACTERIZATION OF COPPER OXIDE NANOPARTICLES USING AQUEOUS EXTRACT OF IRANIAN VIOLACEAE FLOWER

2021 ◽  
Vol 15 (3) ◽  
Author(s):  
Ali Davari ◽  
Vahid Hakimzadeh ◽  
Elham Mahdian ◽  
Mostafa Shahidi-Noghabi
Keyword(s):  
Copper Oxide ◽  
Ftir Spectroscopy ◽  
Average Particle Size ◽  
Copper Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Average Particle ◽  
Stabilizing Agents ◽  
Cuo Nps ◽  
Wide Range ◽  
Uv Visible

In this work, we have synthesized copper oxide nanoparticles using Iranian violaceae flower extract and explored its biological activity. Green synthesis has emerged as a reliable, sustainable and ecofriendly protocol for synthesizing a wide range of nanomaterials and hybrid materials. In this paper, we report the synthesis of Copper oxide nanoparticles by a simple biological route using the extract of Iranian violaceae flower and CuSO4, 5 H2O was used to synthesis the copper oxide Nanoparticles. The synthesized copper oxide nanoparticles were characterized using UV–visible spectroscopy, FTIR spectroscopy, FESEM, EDAX, and XRD techniques. UV –Visible analysis shows a characteristic peak around 266 nm for copper oxide nanoparticles and which is characteristic copper oxide nanoparticles. FTIR spectroscopy was used to characterize various capping and reducing agents present in the plant extract responsible for nanoparticle formation. The surface morphology was characterized using FESEM. The EDAX and XRD pattern suggested that prepared copper oxide nanoparticles were highly pure. The average particle size was calculated as 78.5 nm and α-copper oxide for all diffraction peaks (JCPDS card No. 41-1449) using the XRD technique. Our finding also support the synthesis of CuO NPs from Iranian violaceae flower sources due to relative abundance of plants for the production of reducing and stabilizing agents required for CuO NPs synthesis, potential efficiency of plant biomolecules in enhancing the toxicity effect of CuO NPs against microbes, prevention of environmental pollution due of nontoxic chemicals and degradation effectiveness of CuO NPs synthesized from plant sources. Furthermore, this study provides useful information on the rapid synthesis of CuO NPs with desired properties from plant extracts. Copper oxide NPs can have a good candidate for different applications.

ANTIBIOTIC PROFILE AND ANTIBACTERIAL ACTIVITY OF COPPER OXIDE NANOPARTICLES AGAINST Pseudomonas fluorescens ISOLATED FROM WOUND INFECTION

2019 ◽  
Vol 9 (o3) ◽  
Author(s):  
Haider Qassim Raheem ◽  
Takwa S. Al-meamar ◽  
Anas M. Almamoori
Keyword(s):  
Antibacterial Activity ◽  
Copper Oxide ◽  
Pseudomonas Fluorescens ◽  
Wide Spectrum ◽  
Copper Oxide Nanoparticles ◽  
Morphological Properties ◽  
Clinical Samples ◽  
Oxide Nanoparticles ◽  
Cuo Nps ◽  
Disk Diffusion Assay

Fifty specimens were collected from wound patients who visited Al-Hilla Teaching Hospital. The samples were grown on Blood and MacConkey agar for 24-48 hr at 37oC. The bacterial isolates which achieved as a pure and predominant growth from clinical samples as Pseudomonas fluorescens, were identified using morphological properties and Vitek2 system. The anti-bacterial activity of copper oxide nanoparticles (CuO NPs) against was tested by (disk diffusion assay) using dilutions of (400, 200, 100, 50, 25, and 12.5‎µ‎g/ml). The (MIC and MBC) of each isolate was determined. CuO NPs shows wide spectrum antibacterial activity against tested bacteria with rise zone of inhibition diameter that is proportionate with the increase in nanoparticle concentration. The MIC of CuO NPs extended from 100-200‎µ‎g/ml and the MBC ranged from 200-400‎µ‎g/ml. The antibiotic profile was determined by Viteck 2 compact system (Biomérieux). CuO NPs‎ found highly effective and safe in P. fluorescens wounds infections comparing with used antibiotics.

scholarly journals Green copper oxide nanoparticles for lead, nickel, and cadmium removal from contaminated water

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Alaa El Din Mahmoud ◽  
Khairia M. Al-Qahtani ◽  
Sahab O. Alflaij ◽  
Salma F. Al-Qahtani ◽  
Faten A. Alsamhan
Keyword(s):  
Experimental Data ◽  
Copper Oxide ◽  
Copper Oxide Nanoparticles ◽  
Bet Surface Area ◽  
Oxide Nanoparticles ◽  
Cadmium Removal ◽  
Cuo Nps ◽  
Pseudo Second Order ◽  
Isotherm And Kinetic Models ◽  
Lead Nickel

AbstractEnvironmentally friendly copper oxide nanoparticles (CuO NPs) were prepared with a green synthesis route without using hazardous chemicals. Hence, the extracts of mint leaves and orange peels were utilized as reducing agents to synthesize CuO NPs-1 and CuO NPs-2, respectively. The synthesized CuO NPs nanoparticles were characterized using scanning electron microscopy (SEM), Energy Dispersive X-ray Analysis (EDX), BET surface area, Ultraviolet–Visible spectroscopy (UV–Vis), and Fourier Transform Infrared Spectroscopy (FT-IR). Various parameters of batch experiments were considered for the removal of Pb(II), Ni(II), and Cd(II) using the CuO NPs such as nanosorbent dose, contact time, pH, and initial metal concentration. The maximum uptake capacity (qm) of both CuO NPs-1 and CuO NPs-2 followed the order of Pb(II) > Ni(II) > Cd(II). The optimum qm of CuO NPs were 88.80, 54.90, and 15.60 mg g−1 for Pb(II), Ni(II), and Cd(II), respectively and occurred at sorbent dose of 0.33 g L−1 and pH of 6. Furthermore, isotherm and kinetic models were applied to fit the experimental data. Freundlich models (R2 > 0.97) and pseudo-second-order model (R2 > 0.96) were fitted well to the experimental data and the equilibrium of metal adsorption occurred within 60 min.

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