Multifunctional CuO nanoparticles with enhanced photocatalytic dye degradation and antibacterial activity

AbstractRhizome extract of Bergenia ciliata was used as a bio-functional reducing material for the green synthesis of copper oxide nanoparticles (CuO NPs). CuO NPs were characterized using ultraviolet–visible spectroscopy, Fourier transforms infrared spectroscopy, X-ray diffraction (XRD), dynamic light scattering, scanning electron microscopy (SEM) and energy-dispersive X-ray analysis (EDX). XRD analysis revealed the monoclinic phase of synthesized CuO NPs with an average particle size of 20 nm. Spherical shaped nanoscale CuO particles were observed by EDX and SEM confirming the Cu and O presence in the synthesized NPs. CuO NPs showed antibacterial effects against Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Salmonella typhi. The antioxidant effect was measured and IC50 values for 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid (ABTS), 2,2-diphenyl-1-picrylhydrazyl and Ferric reducing antioxidant power assays were found to be 91.2, 72.4 and 109 μg mL− 1 respectively. Under sunlight, the CuO NPs reported extraordinary photocatalytic activity against Methylene Blue and Methyl Red degradation with efficiencies of 92–85%. CuO NPs have excellent potential application for the photocatalytic degradation of organic pollutants and in the development of antibacterial materials. This study offers new insights in the field of inexpensive and green synthesis-based antimicrobial effective CuO photocatalysts from B. ciliata to remove harmful dyes from industrial-based waters with high degradation efficiency, which is environmentally friendly.

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Multifunctional CuO Nanoparticles with enhanced photocatalytic dye degradation and antibacterial activity

10.21203/rs.3.rs-346220/v1 ◽

2021 ◽

Author(s):

Kanika Dulta ◽

Gözde Koşarsoy Ağçeli ◽

Parveen Chauhan ◽

Rohit Jasrotia ◽

Gourav Chandan ◽

...

Keyword(s):

Dye Degradation ◽

Organic Pollutant ◽

Average Particle Size ◽

Ultra Violet ◽

Xrd Analysis ◽

Copper Oxide Nanoparticles ◽

Cuo Nanoparticles ◽

Average Particle ◽

X Ray ◽

Cuo Nps

Abstract Rhizome extract of Bergenia ciliata was used as a bio-functional reducing material for green synthesis of copper oxide nanoparticles (CuO NPs). CuO NPs were characterized using ultra violet–visible spectroscopy (UV–vis), fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), dynamic light scattering (DLS), scanning electron microscopy (SEM) and energy-dispersive X-ray analysis (EDX). XRD analysis revealed the monoclinic phase of synthesized CuO NPs with average particle size of 20 nm. Spherical shaped nanoscale CuO particles were observed by EDX and SEM confirming the Cu and O presence in the synthesized nanoparticles. CuO nanoparticles showed antibacterial effects against all bacteria used in the study. The antioxidant effect was measured and IC50 values for ABTS, DPPH and FRAP assays were found to be 91.2, 72.4 and 109.0 µg/ mL− 1 respectively. Under sunlight, the CuO NPs reported extraordinary photocatalytic activity against methylene blue and methyl red degradation with efficiencies of 92 and 85 percent, respectively. CuO NPs have excellent potential application for the photocatalytic degradation of organic pollutant and in the development of antibacterial materials and for the first-time effect of these nanoparticles were reported.

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Facile Microemulsion Synthesis of Vanadium-Doped ZnO Nanoparticles to Analyze the Compositional, Optical, and Electronic Properties

Materials ◽

10.3390/ma12050821 ◽

2019 ◽

Vol 12 (5) ◽

pp. 821 ◽

Cited By ~ 2

Author(s):

H.S. Ali ◽

Ali Alghamdi ◽

G. Murtaza ◽

H.S. Arif ◽

Wasim Naeem ◽

...

Keyword(s):

Zno Nanoparticles ◽

Average Particle Size ◽

Xrd Analysis ◽

Attenuated Total Reflection ◽

Lattice Parameters ◽

Average Particle ◽

Structural Morphology ◽

Wurtzite Phase ◽

X Ray ◽

Doped Zno

In this work, microemulsion method has been followed to synthesize vanadium-doped Zn1−xVxO (with x = 0.0, 0.02, 0.04, 0.06, 0.08, and 0.10) nanoparticles. The prepared samples are characterized by several techniques to investigate the structural, morphology, electronic, functional bonding, and optical properties. X-ray diffractometer (XRD) analysis confirms the wurtzite phase of the undoped and V-doped ZnO nanoparticles. Variation in the lattice parameters ensures the incorporation of vanadium in the lattice of ZnO. Scanning electron microscopy (SEM) shows that by increasing contents of V ions, the average particle size increases gradually. X-ray Absorption Near Edge Spectroscopy (XANES) at the V L3,2 edge, oxygen K-edge, and Zn L3,2 edge reveals the presence and effect of vanadium contents in the Zn host lattice. Furthermore, the existence of chemical bonding and functional groups are also asserted by attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR). UV–Visible analysis shows that by increasing V+ contents, a reduction up to 2.92 eV in the energy band gap is observed, which is probably due to an increase in the free electron concentration and change in the lattice parameters.

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Micropyretic synthesis of MoSi2 powders through an aluminothermic reaction

Journal of Materials Research ◽

10.1557/jmr.1999.0273 ◽

1999 ◽

Vol 14 (5) ◽

pp. 2023-2028 ◽

Cited By ~ 2

Author(s):

Ming Fu ◽

S. Penumella ◽

J. A. Sekhar

Keyword(s):

Average Particle Size ◽

Molybdenum Disilicide ◽

Xrd Analysis ◽

Phosphoric Acid Solution ◽

Synthesis Process ◽

Average Particle ◽

X Ray Diffraction ◽

Powder Mixtures ◽

X Ray ◽

Aluminothermic Reaction

An aluminothermic reaction starting with inexpensive MoO3, SiO2, and Al powders was utilized to prepare molybdenum disilicide (MoSi2) powders by the micropyretic/combustion synthesis process and leaching. The combustion-synthesized product was porous and could readily be crushed into powders. X-ray diffraction (XRD) analysis revealed that the product of such a reaction consisted of α–Al2O3, MoSi2, and a small amount of Mo(Si,Al)2 and Mo5Si3. The reason for the formation of Mo(Si, Al)2 phase is discussed. MoSi2 powders were obtained by leaching out the Al2O3 from the synthesized powder mixtures in boiling phosphoric acid solution. The synthesized MoSi2 powders, including a small amount of Mo(Si, Al)2 and Mo5Si3, were very fine with an average particle size of about 1 μm.

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Synthesis and Characterization of Nano-Silica from Teff Straw

Journal of Nano Research ◽

10.4028/www.scientific.net/jnanor.46.64 ◽

2017 ◽

Vol 46 ◽

pp. 64-72 ◽

Cited By ~ 3

Author(s):

Abrham Bayeh Wassie ◽

Vimal Chandra Srivastava

Keyword(s):

Acid Treatment ◽

Average Particle Size ◽

Small Diameter ◽

Xrd Analysis ◽

Average Particle ◽

Nano Silica ◽

East African ◽

Agricultural Residue ◽

X Ray ◽

Straw Ash

Efficient utilization of agricultural residue is the need of today’s environment. Teff straw is one such agricultural residue which is available in high amount in east African continent particularly Ethiopia. In the present study, combination of heat and acid treatment has been used to extract nano-silica from teff straw. X-ray fluorescence (XRF) analysis showed presence of high amount of silicon dioxide (≈52%) in raw teff straw. Thermal treatment at 600°C for 4 hour increased the SiO2 concentration to ≈ 92% in its ash. Further acid treatment increased the concentration to ≈97%. Fourier transform infrared (FTIR) spectroscopy also confirmed increase in SiO2 after thermal and acid treatment. X-ray diffraction (XRD) analysis showed the silica of amorphous nature in teff straw ash before acid treatment (S-BAT) whereas crystallinity increased after acid treatment (S-AAT). Transmission electron microscopy (TEM) showed presence of uniform nano-disks shaped particles of 50 nm average particle size in acid treated teff straw ash. Compared to other agricultural residues high amount of silica availability as raw and its small diameter anatomy structure will make teff straw better source of silica material at lower heat and chemical treatment.

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Studies on Adsorption of Congo red (Acid Red 28) Azodye by Nano Copperoxide

Advances in Nanoscience and Nanotechnology ◽

10.33140/ann/02/01/00008 ◽

2018 ◽

Vol 2 (1) ◽

Keyword(s):

Copper Oxide ◽

Copper Nanoparticles ◽

Azo Dye ◽

Dye Degradation ◽

Uv Spectroscopy ◽

Line Graph ◽

Average Particle Size ◽

Copper Oxide Nanoparticles ◽

Oxide Nanoparticles ◽

Average Particle

In this study, stable copper nanoparticles were synthesized by using Aloe barbadensis leaf extracts. The present study tracing of an object is a green synthesis of copper nanoparticles by the interaction of leaf extract and copper salt and its azo dye (congored) degradation efficiency. The characterization of copper oxide nanoparticles were performed by XRD, SEM, FTIR, UV spectroscopy. The XRD analysis showed that average particle size was between 5-30nm by scherrer equation. The shape of the copper nanoparticles was spherical and cubic. The EDX of synthesized nanoparticles confirmed copper content 68%. UV spectrophotometer analysis confirms peak of the copper nanoparticles between 200-400nm. The effect of variables like concentration, time, PH, adsorbent dosage also examined in this present study on % degradation of dye. It was noted that maximum dye removal occured at PH= 4, maximum concentration of adsorbent 1mg/l, maximum time for dye degradation 120 mint. The nanoparticles removed 70% of congored dye from solution at optimum condition of reaction parameters.The kinetics of pseudo second order is followed by adsorption process.The calculated sum of square .012 and r2 =.980 were analyzed. Langmuir isotherm model fit best and straight line graph drawned with r2 value .991 and probability 1.6E-5. This showed that copper oxide nanoparticles have efficient capacity of azo dye degradation.

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

Food Science and Technology ◽

10.15673/fst.v15i3.2178 ◽

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.

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Photodegradation of Eosin Y Using Silver-Doped Magnetic Nanoparticles

International Journal of Analytical Chemistry ◽

10.1155/2015/797606 ◽

2015 ◽

Vol 2015 ◽

pp. 1-11 ◽

Cited By ~ 10

Author(s):

Eman Alzahrani

Keyword(s):

Magnetic Nanoparticles ◽

Irradiation Time ◽

Average Particle Size ◽

Chemical Properties ◽

Xrd Analysis ◽

Order Rate Constant ◽

Average Particle ◽

Eosin Y ◽

Human Beings ◽

X Ray

The purification of industrial wastewater from dyes is becoming increasingly important since they are toxic or carcinogenic to human beings. Nanomaterials have been receiving significant attention due to their unique physical and chemical properties compared with their larger-size counterparts. The aim of the present investigation was to fabricate magnetic nanoparticles (MNPs) using a coprecipitation method, followed by coating with silver (Ag) in order to enhance the photocatalytic activity of the MNPs by loading metal onto them. The fabricated magnetic nanoparticles coated with Ag were characterised using different instruments such as a scanning electron microscope (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray (EDAX) spectroscopy, and X-ray diffraction (XRD) analysis. The average size of the magnetic nanoparticles had a mean diameter of about 48 nm, and the average particle size changed to 55 nm after doping. The fabricated Ag-doped magnetic nanoparticles were used for the degradation of eosin Y under UV-lamp irradiation. The experimental results revealed that the use of fabricated magnetic nanoparticles coated with Ag can be considered as reliable methods for the removal of eosin Y since the slope of evaluation of pseudo-first-order rate constant from the slope of the plot betweenln⁡(Co/C)and the irradiation time was found to be linear. Ag-Fe3O4nanoparticles would be considered an efficient photocatalyst to degrade textile dyes avoiding the tedious filtration step.

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A Facile Synthesis of Cu2O and CuO Nanoparticles Via Sonochemical Assisted Method

Current Nanoscience ◽

10.2174/1573413714666180530085447 ◽

2018 ◽

Vol 15 (2) ◽

pp. 209-213 ◽

Cited By ~ 7

Author(s):

Sathish Mohan Botsa ◽

Ramadevi Dharmasoth ◽

Keloth Basavaiah

Keyword(s):

Diffuse Reflectance Spectroscopy ◽

Cupric Oxide ◽

Copper Acetate ◽

Chemical Properties ◽

Copper Oxide Nanoparticles ◽

Reducing Agents ◽

Sonochemical Method ◽

Phase Purity ◽

X Ray ◽

Cuo Nps

Background: During past two decades, functional nanomaterials have received great attention for many technological applications such as catalysis, energy, environment, medical and sensor due to their unique properties at nanoscale. However, copper oxide nanoparticles (NPs) such as CuO and Cu2O have most widely investigated for many potential applications due to their wide bandgap, high TC, high optical absorption and non-toxic in nature. The physical and chemical properties of CuO and Cu2O NPs are critically depending on their size, morphology and phase purity. Therefore, lots of efforts have been done to prepare phase CuO and Cu2O NPs with different morphology and size. Method: The synthesis of cupric oxide (CuO) and cuprous oxide (Cu2O) NPs using copper acetate as a precursor by varying the reducing agents such as hydrazine sulphate and hydrazine hydrate via sonochemical method. The phase, morphology and crystalline structure of a prepared CuO and Cu2O NPs were investigated by X-ray diffraction (XRD), Fourier transform infrared (FTIR), Field emission scanning electron microscopy (FESEM), Energy dispersive X-ray (EDS) and UV-Visible Diffuse reflectance spectroscopy (DRS). Results: The phase of NPs was tuned as a function of reducing agents.XRD patterns confirmed the formation of pure phase crystalline CuO and Cu2O NPs. FTIR peak at 621 cm-1 confirmed Cu(I)-O vibrations, while CuO vibrations confirmed by the presence of two peaks at 536 and 586 cm-1. Further investigation was done by Raman, which clearly indicates the presence of peaks at 290, 336, 302 cm-1 and 173, 241 cm-1 for CuO and Cu2O NPs, respectively. The FESEM images revealed rod-like morphology of the CuO NPs while octahedral like shape for Cu2O NPs. The presence of elemental Cu and O in stoichiometric ratios in EDS spectra confirms the formation of both CuO and Cu2O NPs. In summary, CuO and Cu2O NPs were successfully synthesized by a sonochemical method using copper acetate as a precursor at different reducing agents. The bandgap of CuO and Cu2O NPs was 2.38 and 1.82, respectively. Furthermore, the phase purity critically depends on reducing agents.

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Green synthesis: Proposed mechanism and factors influencing the synthesis of platinum nanoparticles

Green Processing and Synthesis ◽

10.1515/gps-2020-0041 ◽

2020 ◽

Vol 9 (1) ◽

pp. 386-398 ◽

Cited By ~ 1

Author(s):

Mahmood S. Jameel ◽

Azlan Abdul Aziz ◽

Mohammed Ali Dheyab

Keyword(s):

Green Synthesis ◽

Reaction Temperature ◽

Platinum Nanoparticles ◽

Energy Requirement ◽

Average Particle Size ◽

High Energy ◽

Energy Utilization ◽

Critical Parameters ◽

Synthesis Process ◽

Average Particle

AbstractPlatinum nanoparticles (Pt NPs) have attracted interest in catalysis and biomedical applications due to their unique structural, optical, and catalytic properties. However, the conventional synthesis of Pt NPs using the chemical and physical methods is constrained by the use of harmful and costly chemicals, intricate preparation requirement, and high energy utilization. Hence, this review emphasizes on the green synthesis of Pt NPs using plant extracts as an alternative approach due to its simplicity, convenience, inexpensiveness, easy scalability, low energy requirement, environmental friendliness, and minimum usage of hazardous materials and maximized efficiency of the synthesis process. The underlying complex processes that cover the green synthesis (biosynthesis) of Pt NPs were reviewed. This review affirms the effects of different critical parameters (pH, reaction temperature, reaction time, and biomass dosage) on the size and shape of the synthesized Pt NPs. For instance, the average particle size of Pt NPs was reported to decrease with increasing pH, reaction temperature, and concentration of plant extract.

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Adsorption Studies of Arsenic(V) by CuO Nanoparticles Synthesized by Phyllanthus emblica Leaf-Extract-Fueled Solution Combustion Synthesis

Sustainability ◽

10.3390/su13042017 ◽

2021 ◽

Vol 13 (4) ◽

pp. 2017

Author(s):

Sadia Saif ◽

Syed F. Adil ◽

Mujeeb Khan ◽

Mohammad Rafe Hatshan ◽

Merajuddin Khan ◽

...

Keyword(s):

Leaf Extract ◽

Solution Combustion Synthesis ◽

Copper Oxide Nanoparticles ◽

Maximum Adsorption Capacity ◽

Phyllanthus Emblica ◽

Adsorption Efficiency ◽

Solution Combustion ◽

X Ray ◽

Cuo Nps ◽

Crystalline Nature

In the present study, a simple and eco-friendly route for the synthesis of copper oxide nanoparticles (CuO NPs) using leaf extract of Phyllanthus emblica as fuel has been demonstrated, as P. emblica is a locally available abundant plant. The formation of the as-prepared CuO NPs was confirmed by using various techniques, such as UV–Vis absorption spectroscopy, cold field scanning electron microscopy (CF–SEM), energy dispersive X-ray analysis (EDX), dynamic light scattering (DLS), and X-ray photoelectron (XPS). The hydrodynamic size of the CuO NPs was found to be 80 nm, while the zeta potential of −28.6 mV was obtained. The elemental composition was confirmed by EDX analysis accompanied with elemental mapping, while the crystalline nature was substantiated by the XRD diffractogram. The as-synthesized CuO NPs were studied for their use as an adsorbent material for the removal of As(V) from water. It was confirmed that the CuO NPs effectively removed As(V) via adsorption, and the adsorption efficiency was found to be best at a higher pH. The maximum adsorption capacity of CuO for As(V) was found to be 1.17 mg/g calculated using the Langmuir equation.

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