Synthesis, characterization, photocatalytic, and antimicrobial activity of ZrO2 nanoparticles and Ag@ZrO2 nanocomposite prepared by the advanced oxidative process/hydrothermal route

Nova, Cássia Vanessa; Reis, K. A.; Pinheiro, António Luiz Barbosa; Dalmaschio, Cleocir José; Chiquito, A. J.; Teodoro, M. D.; Rodrigues, Ariano De Giovanni; Longo, E.

doi:10.1007/s10971-021-05488-z

Cited by 19 publications

(3 citation statements)

References 57 publications

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“…Applications for this material range from ceramic industry, gas sensing, solar fuel cells and biomedical/catalytic fields to its incorporation in large-scale integrated circuits, owing to a high dielectric constant and as a gate dielectric in metal-oxide-semiconductor devices (MOS) [22,[24][25][26]. In this regard, ZrO 2 has emerged as a potential alternative to replace low-κ SiO 2 in electronic devices [27].…”

Section: Introductionmentioning

confidence: 99%

A Comparison between Solution-Based Synthesis Methods of ZrO2 Nanomaterials for Energy Storage Applications

et al. 2022

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The present study is focused on the synthesis of zirconium dioxide (ZrO2) nanomaterials using the hydrothermal method assisted by microwave irradiation and solution combustion synthesis. Both synthesis techniques resulted in ZrO2 powders with a mixture of tetragonal and monoclinic phases. For microwave synthesis, a further calcination treatment at 800 °C for 15 min was carried out to produce nanopowders with a dominant monoclinic ZrO2 phase, as attested by X-ray diffraction (XRD) and Raman spectroscopy. The thermal behavior of the ZrO2 nanopowder was investigated by in situ XRD measurements. From the scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images, the presence of near spherical nanoparticles was clear, and TEM confirmed the ZrO2 phases that comprised the calcinated nanopowders, which include a residual tetragonal phase. The optical properties of these ZrO2 nanopowders were assessed through photoluminescence (PL) and PL excitation (PLE) at room temperature (RT), revealing the presence of a broad emission band peaked in the visible spectral region, which suffers a redshift in its peak position, as well as intensity enhancement, after the calcination treatment. The powder resultant from the solution combustion synthesis was composed of plate-like structures with a micrometer size; however, ZrO2 nanoparticles with different shapes were also observed. Thin films were also produced by solution combustion synthesis and deposited on silicon substrates to produce energy storage devices, i.e., ZrO2 capacitors. The capacitors that were prepared from a 0.2 M zirconium nitrate-based precursor solution in 2-methoxyethanol and annealed at 350 °C exhibited an average dielectric constant (κ) of 11 ± 0.5 and low leakage current density of 3.9 ± 1.1 × 10−7 A/cm2 at 1 MV/cm. This study demonstrates the simple and cost-effective aspects of both synthesis routes to produce ZrO2 nanomaterials that can be applied to energy storage devices, such as capacitors.

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Section: Introductionmentioning

confidence: 99%

A Comparison between Solution-Based Synthesis Methods of ZrO2 Nanomaterials for Energy Storage Applications

et al. 2022

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“…Namely, when the CuO/ZrO2/CB/coal-tar-pitch-SAC powders were irradiated by visible Furthermore, UV-Vis diffuse reflection spectroscopy (DRS) measurements were carried out to investigate the improvement of photosensitivity of CuO/ZrO2/CB/coal-tarpitch-SAC powders with a heterojunction among the ZrO2 and CuO. As shown in Figure 6, it is naturally considered that the strong absorptive intensity around 270 nm was attributed to the ZrO2 on the surface of ZrO2/CB/coal-tar-pitch-SAC [28]. Nevertheless, the ZrO2/CB/coal-tar-pitch-SAC materials showed weak photosensitivity at an irradiation range of 400 to 800 nm.…”

Section: Resultsmentioning

confidence: 99%

Fabrication and Sterilization Characteristics of Visible Light Photocatalyst of CuO/ZrO2/CB/Coal-Tar-Pitch-SAC

Han

et al. 2021

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To provide an effective method of green aquaculture, the photocatalysts of CuO/ZrO2/CB/coal-tar-pitch-SAC, which have visible light sterilization capacity, were successfully fabricated by coating ZrO2 and CuO on the surface of CB/coal-tar-pitch-SAC. The structures of synthesized CuO/ZrO2/CB/coal-tar-pitch-SAC were investigated by XRD, XPS and SEM measurements in detail. It was observed that CuO/ZrO2/CB/coal-tar-pitch-SAC materials possess obvious heterojunction structure and excellent visible light sterilization capacity when the prepared weight ratio of CuO, ZrO2 and CB/coal-tar-pitch-SAC is controlled as 0.03:0.3:1. Our studies can provide a beneficial reference for the design of photocatalysts with sterilization capacity in visible light.

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“…Green synthesized AgNPs are used to produce antibacterial materials and wound healing creams and in applications in medicine, therapeutics, agriculture, diagnostics, etc. (Naghmachi et al 2022 ; Nova et al 2021 ). The antimicrobial activity of AgNPs is attributed to the fact that Ag + ions released into the environment pass through the membrane and cause cell death.…”

Section: Introductionmentioning

confidence: 98%

Environmentally friendly silver nanoparticles synthesized from Verbascum nudatum var. extract and evaluation of its versatile biological properties and dye degradation activity

Hazman,

Khamidov,

Yilmaz

et al. 2024

Environ Sci Pollut Res

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In the present study, green synthesis of silver nanoparticles (VNE-AgNPs) via Verbascum nudatum extract was carried out for the first time. The synthesized AgNPs were characterized by different spectral methods such as UV–vis, FTIR, XRD, TEM, and EDAX. According to TEM analyses, the average size range of AgNPs was 17–21 nm, and the dominant peaks in the 111°, 200°, 221°, and 311° planes in the XRD pattern indicated the Ag-NPs FCC crystal structure. FTIR data showed that VNE-AgNPs interacted with many reducing, capping, and stabilizing phytochemicals during green synthesis. VNE-AgNPs had higher antibacterial activity against S. aureus and E. coli bacterial strains with a maximum inhibition zone of 21 and 18 mm, respectively, than penicillin 5 IU, used as a positive control in the study. The cytotoxic effect of VNE-AgNPs appeared at a concentration of 50 µg/mL in L929 cells and 5 µg/mL in cancer (A549) cells. When the impact of VNE-AgNPs and C-AgNPs on inflammation was compared, it was found that VNE-AgNPs increased TNF-α levels (333.45 ± 67.20 ng/mg-protein) statistically (p < 0.05) more than TNF-α levels (256.92 ± 27.88 ng/mg-protein) in cells treated with C-AgNPs. VNE-Ag-NPs were found to have a degradation efficiency of 65% against methylene blue (MB) dye within 3 h. Graphical Abstract

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Synthesis, characterization, photocatalytic, and antimicrobial activity of ZrO2 nanoparticles and Ag@ZrO2 nanocomposite prepared by the advanced oxidative process/hydrothermal route

Cited by 19 publications

References 57 publications

A Comparison between Solution-Based Synthesis Methods of ZrO2 Nanomaterials for Energy Storage Applications

A Comparison between Solution-Based Synthesis Methods of ZrO2 Nanomaterials for Energy Storage Applications

Fabrication and Sterilization Characteristics of Visible Light Photocatalyst of CuO/ZrO2/CB/Coal-Tar-Pitch-SAC

Environmentally friendly silver nanoparticles synthesized from Verbascum nudatum var. extract and evaluation of its versatile biological properties and dye degradation activity

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