Analysis of structural, optical and magnetic properties of Fe/Co co-doped ZnO nanocrystals

Sharma, Darshan; Jha, Ranjana

doi:10.1016/j.ceramint.2017.03.201

Cited by 125 publications

(56 citation statements)

References 82 publications

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“…The origin of room‐temperature ferromagnetic materials has been explained by considering the presence of secondary phase, level/density of defect (O, Zn or O, and Zn vacancies), free carrier‐mediated exchange, the sp‐d exchange mechanism, etc. It has been reported that the bulk ZnO exhibits a week diamagnetic behavior, whereas ZnO NPs shows a room‐temperature ferromagnetic materials, mainly due to formation of oxygen and zinc vacancies during the preparation, and the associated point defects . The reason for room‐temperature ferromagnetism in Co‐doped ZnO is the successful doping of the Co ions on Zn sites as in accordance with the XRD results.…”

Section: Resultssupporting

confidence: 79%

“…It has been reported that the bulk ZnO exhibits a week diamagnetic behavior, whereas ZnO NPs shows a room-temperature ferromagnetic materials, mainly due to formation of oxygen and zinc vacancies during the preparation, and the associated point defects. 1,3 The reason for room-temperature ferromagnetism in Co-doped ZnO is the successful doping of the Co ions on Zn sites as in accordance with the XRD results.…”

Section: Ftir Spectrasupporting

confidence: 75%

“…Recently many investigations have been performed on the n‐type semiconductor ZnO because it has a direct and wide‐band gap energy (3.37 eV) at room temperature with a large exciton binding energy (60 meV) . Furthermore, owing to its high thermal stability, nontoxic nature, and its low‐cost, ZnO has a wide range of optical, electronic, and thermoelectric applications .…”

Section: Introductionmentioning

confidence: 99%

“…Recently many investigations have been performed on the n-type semiconductor ZnO because it has a direct and wide-band gap energy (3.37 eV) at room temperature with a large exciton binding energy (60 meV). [1][2][3][4][5][6] Furthermore, owing to its high thermal stability, nontoxic nature, and its low-cost, ZnO has a wide range of optical, electronic, and thermoelectric applications. [7][8][9] ZnO nanoparticles (NPs) have also received acclaim as a potential candidate for solar energy conversion cells, transparent transistors, catalysts, light-emitting diodes, spintronic devices as well as various drug-delivery and antibacterial uses.…”

Section: Introductionmentioning

confidence: 99%

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Structural, optical, thermoelectrical, and magnetic study of Zn_1‐xCo_xO (0 ≤ x ≤ 0.10) nanocrystals

Akhtari

Zorriasatein

Farahmandjou

et al. 2017

Int J Applied Ceramic Tech

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In this work, we have prepared Co‐doped ZnO nanocomposites by zinc nitrate and cobalt sulfate as new precursors via the coprecipitation method and the samples were followed to identify the morphological, optical, structural, and magnetic properties. The XRD patterns revealed the crystalline nature of nanoparticles with hexagonal wurtzite structures, which meant that Co impurity did not disturb the structure of pure ZnO and the minimum crystallite size of nanoparticles was calculated to be around 37 nm. The XRD patterns also showed the lattice parameter increase owing to the incorporation of a Co dopant. The TEM results revealed the sphere‐like particles whose size varied between 56 and 88 nm in diameter at a 4% level of impurity. DRS analysis identified that the band gap energy decreased from 3.18 eV for the pure substance to 2.36 eV for the 10% impure substance. VSM analysis exhibited that the saturation magnetization value increased to 8.4 × 10−3 emu/g for the highest Co content of 10%, which indicated the ferromagnetic behavior of NPs.

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Section: Resultssupporting

confidence: 79%

Section: Ftir Spectrasupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structural, optical, thermoelectrical, and magnetic study of Zn_1‐xCo_xO (0 ≤ x ≤ 0.10) nanocrystals

Akhtari

Zorriasatein

Farahmandjou

et al. 2017

Int J Applied Ceramic Tech

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“…Even more, it can be suggested that the diffraction lines of Zn-containing phases can be superposed with those from the amorphous carbon matrix (Figure 1c). 201, respectively, for the crystallographic planes of a zincite crystal structure [45] of hexagonal symmetry and space group P63mc (# 186) (JCPDS No. .…”

Section: Introductionmentioning

confidence: 99%

Hybrid Material Based on an Amorphous-Carbon Matrix and ZnO/Zn for the Solar Photocatalytic Degradation of Basic Blue 41

et al. 2019

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Innovative composites based on an amorphous-carbon matrix containing a second phase ZnO oxide and/or highly dispersed Zn metallic were synthesized via a modified Pechini route, in which a partial pyrolysis method was reached. Studies of adsorption in the dark and the photocatalytic activity for the cationic azo-dye, basic blue 41, and degradation were carried out. X-ray diffraction patterns for the carbon matrix and its composite with Zn show characteristics of the amorphous carbon. The infrared in the mid region of the composite prepared with ZnO and Zn exhibit vibrational bands related to bonds zinc oxide. The surface pH of the material is the main factor responsible for the adsorption of the azo-dye, but the contribution of mesopores favored the diffusion of molecules from the bulk of solution to the pore framework. Esters-like functional groups on the surface of carbons hinder the adsorption of the azo-dye. When Zn is embedded within amorphous carbon the photocatalytic activity of the composites showed up to 2.4 higher than neat ZnO. The enhancement in the photocatalytic activity and stability of C/ZnO/Zn and C/Zn composites is discussed in terms of a protector effect by the carbon layers inserted in composites. Carbon layers are responsible to inhibit the lixiviation of ZnO particles along irradiation.

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Role of Structural Decisive via Ultra‐Sonication on Photocatalytic Response of MWCNTs Intercalated ZnO Composites

Manjhu,

Meena,

Meena

et al. 2024

Macromolecular Symposia

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In this manuscript role of MWCNTs on the photocatalytic response of zinc oxide (ZnO) semiconductor photocatalyst is reported. Developing a cheap, stable, and effective photo catalyst is necessary for remediation of persistent organic pollutants. To address this challenge, ZnO/MWCNT composites are fabricated via sonication technique with interfacial engineering for effective photocatalytic response. X‐ray diffraction spectra confirms hexagonal structure of ZnO/MWCNT composites with the average particle size distribution of 73–80 nm. FT‐IR spectra confirms bonding structure, however SEM images confirm the homogeneous distribution of MWCNTs in the ZnO system which acts as an effective adsorbent sites. The highest degradation (90%) of methylene blue (MB) dye on ZnO95MWCNT5 composite has been observed. It is expected that MWCNTs taking part to electron transfer facilitation in spatial separation and electron–hole pairs of ZnO during photo catalysis mechanism.

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Analysis of structural, optical and magnetic properties of Fe/Co co-doped ZnO nanocrystals

Cited by 125 publications

References 82 publications

Structural, optical, thermoelectrical, and magnetic study of Zn_1‐xCo_xO (0 ≤ x ≤ 0.10) nanocrystals

Structural, optical, thermoelectrical, and magnetic study of Zn_1‐xCo_xO (0 ≤ x ≤ 0.10) nanocrystals

Hybrid Material Based on an Amorphous-Carbon Matrix and ZnO/Zn for the Solar Photocatalytic Degradation of Basic Blue 41

Role of Structural Decisive via Ultra‐Sonication on Photocatalytic Response of MWCNTs Intercalated ZnO Composites

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Analysis of structural, optical and magnetic properties of Fe/Co co-doped ZnO nanocrystals

Cited by 125 publications

References 82 publications

Structural, optical, thermoelectrical, and magnetic study of Zn1‐xCoxO (0 ≤ x ≤ 0.10) nanocrystals

Structural, optical, thermoelectrical, and magnetic study of Zn1‐xCoxO (0 ≤ x ≤ 0.10) nanocrystals

Hybrid Material Based on an Amorphous-Carbon Matrix and ZnO/Zn for the Solar Photocatalytic Degradation of Basic Blue 41

Role of Structural Decisive via Ultra‐Sonication on Photocatalytic Response of MWCNTs Intercalated ZnO Composites

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Structural, optical, thermoelectrical, and magnetic study of Zn_1‐xCo_xO (0 ≤ x ≤ 0.10) nanocrystals

Structural, optical, thermoelectrical, and magnetic study of Zn_1‐xCo_xO (0 ≤ x ≤ 0.10) nanocrystals