Enhancing the electrical conductivity and the dielectric features of ZnO nanoparticles through Co doping effect for energy storage applications

Saadi, H.; Benzarti, Z.; Sanguino, P.; Pina, João; Abdelmoula, N.; Melo, J. Sérgio Seixas de

doi:10.1007/s10854-022-09470-5

Cited by 35 publications

(19 citation statements)

References 50 publications

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“…However, the apparent low band gap can be attributed to the presence of excess Zn, or Zn interstitials in the wurtzite structure of ZnO. In a recent report, band gap values were found to vary from 3.185 to 2.892 eV for un-doped ZnO and 5% Co doped ZnO nanoparticles [ 36 ]. Similar results have been reported by P. Pascariu et al for rare earth doped ZnO nanostructures in which the band gap was 2.80, 2.81 eV, 2.82 eV, and 2.85 eV for un-doped ZnO, Sm, Er and La doped ZnO, respectively [ 37 ].…”

Section: Resultsmentioning

confidence: 99%

Rare Earth Doped ZnO Nanoparticles as Spintronics and Photo Catalyst for Degradation of Pollutants

et al. 2023

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Antibiotic water contamination is a growing environmental problem in the present day. As a result, water treatment is required for its reduction and elimination. Due to their important role in resolving this issue, photocatalysts have drawn a great deal of interest over the past few decades. When non-biodegradable organic matter is present in polluted water, the photo catalytic process, which is both environmentally friendly and an improved oxidation method, can be an effective means of remediation. In this regard, we report the successful synthesis of pure phased rare earth doped ZnO nanoparticles for tetracycline degradation. The prepared catalysts were systematically characterized for structural, optical, and magnetic properties. The optical band gap was tailored by rare earth doping, with redshift for Sm and Dy doped nanoparticles and blueshift for Nd doped ZnO nanoparticles. The analysis of photoluminescence spectra revealed information about the defect chemistry of all synthesised nanoparticles. Magnetic studies revealed that all synthesized diluted magnetic semiconductors exhibit room temperature ferromagnetism and can be employed for spintronic applications. Moreover, Dy doped ZnO nanoparticles were found to exhibit a maximum degradation efficiency of 74.19% for tetracycline (TCN) removal. The synthesized catalysts were also employed for the degradation of Malachite green (MG), and Crystal violet (CV) dyes. The maximum degradation efficiency achieved was 97.18% for MG and 98% for CV for Dy doped ZnO nanoparticles. The degradation mechanism involved has been discussed in view of the reactive species determined from scavenging experiments.

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Section: Resultsmentioning

confidence: 99%

Rare Earth Doped ZnO Nanoparticles as Spintronics and Photo Catalyst for Degradation of Pollutants

et al. 2023

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“…Table 5 gives a comparison of the particle size, band gap and the saturation magnetization of some papers in the literature with the present paper. [11] (0.0, 0.2, 0.4, 0.6) 28-36 3.2-3.0 0.05-0.08 Hongfen et al [24] (0.0, 0.5, 1.0, 5.0, 10) ∼31 3.1-27 0.008-0.06 Gandhi et al [30] (00, 05, 10, 15) 29-35 -0.03-0.09 Shatwanti et al [47] (2.5, 5.0, 7.5, 10) 60-77 3.15-2.72 -Saadi et al [50] (00, 01, 03, 05) 26-57 3.18-2.89 -Zong et al [51] (00, 01, 02, 04) 11-15 -0.025-0.033 K. Singh et al [52] (0.0, 0.5, 1.0) 17-21 3.48-3.40 -Kayani et al [53] (00, 01, 02, 03, 05) ∼12-20 3.99-3.2 0.0003-0.0011…”

Section: Magnetic Studymentioning

confidence: 99%

Investigation on the impact of cobalt doping on optical, structural and magnetic properties of zinc oxide nanoparticles

Roy,

Mukherjee

2023

Phys. Scr.

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In the current article, we investigated the impact of transition metal Co2+ doping in ZnO nanoparticles and its effect on their optical, structural, and magnetic properties. The synthesized nanoparticles have the generic formula Zn1-xCoxO (x = 0.00, 0.03, 0.06, and 0.09). Single-phase hexagonal crystal structure of the synthesized nanopowder was confirmed by X-ray diffractograms. Tauc plots were used to calculate the band gap of all the samples. Multiple emission peaks were observed from the photoluminescence studies. HRTEM was employed to study the particle morphology and the size distribution. X-ray photoelectron (XPS) spectroscopy was performed to investigate the chemical composition of samples. Magnetic measurements were carried out to study the magnetic behaviour of pure and doped ZnO samples. Ferromagnetic behaviour became more prominent with the addition of Co doping, as observed by room temperature M-H plots.

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“…Several NPs have been developed and studied extensively for their innumerable applications. Among various NPs, ZnO NPs find various applications in cosmetics [3,4], antimicrobials [5][6], food packaging [7], conductive coatings [8], sensors [9], catalysis [10], photovoltaics [11,12], anticarcinogenic [13][14][15], anti-tubercular agent [16], drug delivery [16], biomedical imaging [17], water purification [18], energy storage [19], antifouling coatings [20] etc. The conventional methods employed for ZnO-MP-NPs synthesis often entail the use of chemical precursors and energyintensive high-temperature processes, raising concerns about their adverse environmental impact.…”

Section: Introductionmentioning

confidence: 99%

Cultivating Eco-Friendly Nanomaterials: Mimosa Pudica-Enhanced Zinc Oxide Nanoparticles for Enhanced Health and Environmental Well-being

Prashanth,

Rao,

Gadewar

et al. 2024

J. Phys.: Conf. Ser.

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In this work, we report the development of ZnO NPs by using environmentally friendly SCS using Mimosa pudica (MP) leaves. The obtained ZnO-MP-NPs were subjected to extensive characterization techniques such as PXRD, BET, SEM, & TEM. Further, ZnO-MP-NPs were evaluated for their antioxidant ability by DPPH method. Their anticancer capability was assessed by MTT assay on human breast cancer cell ine MCF-7. The results indicated the potential applications of ZnO-MP-NPs both as antioxidant and anticancer agents.

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Enhancing the electrical conductivity and the dielectric features of ZnO nanoparticles through Co doping effect for energy storage applications

Cited by 35 publications

References 50 publications

Rare Earth Doped ZnO Nanoparticles as Spintronics and Photo Catalyst for Degradation of Pollutants

Rare Earth Doped ZnO Nanoparticles as Spintronics and Photo Catalyst for Degradation of Pollutants

Investigation on the impact of cobalt doping on optical, structural and magnetic properties of zinc oxide nanoparticles

Cultivating Eco-Friendly Nanomaterials: Mimosa Pudica-Enhanced Zinc Oxide Nanoparticles for Enhanced Health and Environmental Well-being

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