Photocatalytic properties of Cu-containing ZnO nanoparticles and their antifungal activity against agriculture-pathogenic fungus

Paraguay‐Delgado, F.; Hermida-Montero, L.A.; Morales-Mendoza, J.E.; Durán-Barradas, Z; Mtz-Enríquez, A.I.; Pariona, Nicolaza

doi:10.1039/d2ra00863g

Cited by 26 publications

(20 citation statements)

References 49 publications

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“…00-036-1451). 20 The XRD pattern for single copper(II) oxide and silver metal shows a monoclinic (JCPDS, File No. 00-048-1548) 21 and facecentered-cubic (JCPDS, File No.…”

Section: Characterizationsmentioning

confidence: 99%

Synthesis of copper–silver–zinc oxide nanocomposites for 4-nitrophenol reduction: doping and heterojunction

2023

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“…00-036-1451). 20 The XRD pattern for single copper(II) oxide and silver metal shows a monoclinic (JCPDS, File No. 00-048-1548) 21 and facecentered-cubic (JCPDS, File No.…”

Section: Characterizationsmentioning

confidence: 99%

Synthesis of copper–silver–zinc oxide nanocomposites for 4-nitrophenol reduction: doping and heterojunction

2023

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“…However, increasing the amount of copper to 10% resulted in the development of two additional monoclinic phases of CuO peaks at 2θ values of 35.5°and 39°with the corresponding planes of (002, 11-1) and (200, 111), respectively. 10,25,26 The slight low-angle shift for doped NCs, especially for 1% doped ZnO NCs, compared to single ZnO NPs confirms the inclusion of copper in the ZnO lattice. Thus, on the 10% doped NCs, both doping and heterojunction took place.…”

Section: Resultsmentioning

confidence: 87%

“…The formation of doping and p–n type II heterojunction is important in the photogenerated electron–hole separation (charge transfer) process, which improves the material’s photoresponse properties . The development of an independent CuO phase above the optimum dopant percentage (solubility level) was also reported in recent works. ,, Mahmoud et al synthesized the Cu-doped ZnO NCs by the sol–gel process. The copper doping up to 4% showed a high-angle peak shift due to substitutional copper doping, with no independent peak for the copper metal or copper oxide.…”

Section: Resultsmentioning

confidence: 95%

“…00-036-1451), with the corresponding planes of (100), (002), (101), (102), (110), (103), and (112), respectively. 25 As shown in Figure 2, the XRD pattern peak for single CuO NPs exhibits a monoclinic phase at 2θ values of 32.4°, 35.6°, 38.7°, 48.8°, 53.5°, 58.3°, and 61.6°(JCPDS, file no. 00-048-1548), with the corresponding planes of (110), (11-1), ( 200), (20-2), (020), (202), and (11-3), respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The XRD pattern peak for ZnO and 1% doped ZnO NCs shows hexagonal ZnO wurtzite characteristic peaks at 32°, 34°, 36°, 48°, 57°, 63°, and 68° (JCPDS, file no. 00-036-1451), with the corresponding planes of (100), (002), (101), (102), (110), (103), and (112), respectively …”

Section: Resultsmentioning

confidence: 99%

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Cu/CuO-Doped ZnO Nanocomposites via Solution Combustion Synthesis for Catalytic 4-Nitrophenol Reduction

et al. 2023

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The synthesis of optoelectrically enhanced nanomaterials should be continuously improved by employing timeand energy-saving techniques. The porous zinc oxide (ZnO) and copper-doped ZnO nanocomposites (NCs) were synthesized by the time-and energy-efficient solution combustion synthesis (SCS) approach. In this SCS approach, once the precursor− surfactant complex ignition point is reached, the reaction starts and ends within a short time without the need for any external energy. The TGA−DTA analysis confirmed that 500 °C was the point at which stable metal oxide was obtained. The doping and heterojunction strategy improved the optoelectric properties of the NCs more than the individual constituents, which then enhanced the materials' charge transfer and optical absorption capabilities. The porosity, nanoscale crystallite size (15−50 nm), and formation of Cu/CuO-ZnO NCs materials were confirmed from the XRD, SEM, and TEM/HRTEM analyses. The obtained d-spacing values of 0.275 and 0.234 nm confirm the formation of ZnO and CuO crystals, respectively. The decrease in photoluminescence intensity for the doped NCs corroborates a reduction in electron−hole recombination. On the Mott−Schottky analysis, the positive slope for ZnO confirms the n-type character, while the negative and positive slopes of the NCs confirm the p-and n-type characters, respectively. A diffusion-controlled type of charge transfer process on the electrode surface was confirmed from the cyclic voltammetric analysis. Thus, the overall analysis shows the applicability of the less expensive and more efficient SCS for several applications, such as catalysis and sensors. To confirm this, an organic catalytic reduction reaction of 4-nitrophenol to 4-aminophenol was tested. Within three and a half minutes, the catalytic reduction result showed the great potential of NCs over ZnO NPs. Thus, the energy-and time-saving SCS approach has a great future outlook as an industrial pollutant catalytic reduction application.

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Biogenic Synthesis, Characterization, and Antifungal Activity Studies of Copper Oxide Nanoparticles Using Aqueous Extract of Moringa oleifera Leaves

Prasad Prajapati,

Toppo,

Majhi

et al. 2023

ChemistrySelect

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The present study reports the green synthesis of cupric oxide nanoparticles (CuO NPs) by an aqueous leaf extract of Moringa oleifera and the antifungal activity assessment of CuO NPs against the phytopathogenic fungi Aspergillus flavus and Aspergillus niger. The CuO NPs showed variable fungitoxic effects against A. flavus and A. niger. At higher doses (1 mg/mL), 83.51 % of mycelial inhibition was found against A. flavus, but 43.51 % was found against A. niger. The percentage inhibition of mycelial growth was found to be dose dependent. The cell viability analysis was carried out to reveal the mechanism of the fungitoxic effect of synthesized NPs and it was revealed that the CuO NPs caused oxidative stress associated with increased ROS production, leading to fungal cell death. The synthesized CuO NPs showed single phase cupric oxide with a monoclinic structure and highly uniform in size (3–5 nm). As the synthesized CuO NPs showed good stability under open atmospheric conditions and a fungitoxicity effect against A. flavus, they may be used to control fungal diseases in an eco‐friendly manner.

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Photocatalytic properties of Cu-containing ZnO nanoparticles and their antifungal activity against agriculture-pathogenic fungus

Abstract: In this work, nanoparticles (NPs) of ZnO, ZnO with Cu incorporated at 2 and 30 wt%, and CuO were prepared by the hydrothermal method.

Cited by 26 publications

References 49 publications

Synthesis of copper–silver–zinc oxide nanocomposites for 4-nitrophenol reduction: doping and heterojunction

Synthesis of copper–silver–zinc oxide nanocomposites for 4-nitrophenol reduction: doping and heterojunction

Cu/CuO-Doped ZnO Nanocomposites via Solution Combustion Synthesis for Catalytic 4-Nitrophenol Reduction

Biogenic Synthesis, Characterization, and Antifungal Activity Studies of Copper Oxide Nanoparticles Using Aqueous Extract of Moringa oleifera Leaves

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