Structural, optical and ferroelectric properties of V doped ZnO

Joshi, R. P.; Kumar, Parmod; Gaur, Anurag; Asokan, K.

doi:10.1007/s13204-013-0231-z

Cited by 74 publications

(24 citation statements)

References 24 publications

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“…They showed that the lattice constant “a” in zinc oxide remains constant while ‘c’ decreases with increasing vanadium. However, our results are in conflict with previous observations by Joshi et al., which reported an increase in the lattice parameter with adding vanadium to ZnO lattice. These discrepancies may be attributed to oxidation states of vanadium (2, 3, 4 or 5) which is substituted in the lattice of zinc oxide.…”

Section: Resultscontrasting

confidence: 99%

“…It was reported that the method of synthesis and preparation has an important effect on the morphology, homogeneity, photocatalytic performance, and sinterability of ceramic powders . Some approaches for synthesizing V‐doped ZnO particles and ZnO‐V 2 O 5 composites have been proposed including solid‐state reaction, sol‐gel, co‐precipitation method, decomposition method, etc. To the best of our knowledge, a study focused on the preparation of V‐doped ZnO via microemulsion method and its photocatalytic properties has not been investigated.…”

Section: Introductionmentioning

confidence: 99%

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Microemulsion synthesis, optical and photocatalytic properties of vanadium‐doped nano ZnO

Shahi

Hassanzadeh-Tabrizi

Saffar‐Teluri

2017

Int J Applied Ceramic Tech

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In the present work, vanadium-doped ZnO nanoparticles with different V concentrations were prepared via microemulsion method and employed as an effective photocatalyst for the degradation of methylene blue. The prepared samples were characterized by different techniques such as thermogravimetric and differential thermal analysis (TG-DTA), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), X-ray diffraction (XRD), scanning electron microscopy (SEM), elemental mapping (MAP), and ultraviolet-visible spectroscopy (Uv-Vis). The XRD patterns of vanadium-doped samples were assigned to wurtzite structure of ZnO and vanadium ions were incorporated into the lattice of zinc oxide. SEM images showed that the synthesized pure zinc oxide has irregular morphology and with adding vanadium dopant, rod and cube-like morphology appeared. The band gap energy of pure ZnO decreased from 3.3 to 3.21 eV on adding 1% vanadium. The results showed that the zinc oxide doped with 1% vanadium exhibited better photocatalytic activity compared to other samples. The possible mechanism for improving of photodegradation efficiency of doped samples was also discussed. K E Y W O R D S microemulsion, nanoparticles, photocatalyst, vanadium, ZnO

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Section: Resultscontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microemulsion synthesis, optical and photocatalytic properties of vanadium‐doped nano ZnO

Shahi

Hassanzadeh-Tabrizi

Saffar‐Teluri

2017

Int J Applied Ceramic Tech

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“…In the figure, seven major peaks are seen at 31.8°, 34.5°, 36.3°, 47.5°, 56.7°, 62.9°, and 68° which can be consigned to diffraction from (100), (002), (101), (102), (110), (103), and (112) planes respectively for a lattice constant of a = b = 3.24 Å and c = 5.2066 Å [38]. The XRD pattern clearly reflects the presence of the hexagonal wurtzite phase crystal structure for pure ZnO nanoparticles (JCPDS: 36-1451) [39].…”

Section: Resultsmentioning

confidence: 99%

Influence of Mg Doping on ZnO Nanoparticles for Enhanced Photocatalytic Evaluation and Antibacterial Analysis

Raj

Sadaiyandi²,

Kennedy³

et al. 2018

Nanoscale Res Lett

257

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In this research, a facile co-precipitation method was used to synthesize pure and Mg-doped ZnO nanoparticles (NPs). The structure, morphology, chemical composition, and optical and antibacterial activity of the synthesized nanoparticles (NPs) were studied with respect to pure and Mg-doped ZnO concentrations (0–7.5 molar (M) %). X-ray diffraction pattern confirmed the presence of crystalline, hexagonal wurtzite phase of ZnO. Scanning electron microscope (SEM) images revealed that pure and Mg-doped ZnO NPs were in the nanoscale regime with hexagonal crystalline morphology around 30–110 nm. Optical characterization of the sample revealed that the band gap energy (Eg) decreased from 3.36 to 3.04 eV with an increase in Mg2+ doping concentration. Optical absorption spectrum of ZnO redshifted as the Mg concentration varied from 2.5 to 7.5 M. Photoluminescence (PL) spectra showed UV emission peak around 400 nm. Enhanced visible emission between 430 and 600 nm with Mg2+ doping indicated the defect density in ZnO by occupying Zn2+ vacancies with Mg2+ ions. Photocatalytic studies revealed that 7.5% Mg-doped ZnO NPs exhibited maximum degradation (78%) for Rhodamine B (RhB) dye under UV-Vis irradiation. Antibacterial studies were conducted using Gram-positive and Gram-negative bacteria. The results demonstrated that doping with Mg ions inside the ZnO matrix had enhanced the antibacterial activity against all types of bacteria and its performance was improved with successive increment in Mg ion concentration inside ZnO NPs.

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“…The peak at 315 cm −1 could be attributed to triply coordinated oxygen (V 3 -O) bond and stretching band [52]. There are many modes in the wave number range of 750-1000 cm −1 arises due to different oxidation states of vanadium [6,16].…”

Section: Ftir Spectroscopymentioning

confidence: 99%

Facile synthesis of high yield two dimensional zinc vanadate nanoflakes

et al. 2019

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Zinc vanadate nanoflakes, with highly porous structure in the range of 50 nm wall thickness, were successfully prepared from ion solutions of the corresponding precursors by a simple co-precipitation method. The prepared zinc vanadate nanoflakes were inspected by X-ray diffraction (XRD), Field emission scanning electron microscope (FE-SEM), High Resolution transmission electron microscope (HRTEM), fourier transform infrared (FTIR), Raman spectroscopy and X-ray fluorescence (XRF) techniques. The formed nanoflakes phase, after drying at 60 °C, is zinc hydroxide vanadium oxide hydrate. After calcination at 400 °C zinc vanadium oxide phases were formed as confirmed from XRD analysis. FE-SEM shows the formation of two dimensional (2D) zinc vanadate nanoflakes which caused by familiarizing shielding of V(OH) 4 − ions on Zn 2+ surface. The absence of ZnO Raman peaks indicates that the bulk phase was a pure zinc vanadate phase. Schematic mechanism of the surface morphology of the zinc vanadate formation was suggested. The high yield of the unique structure obtained by this simple synthesis method might open the door for vital industrial applications of the prepared material and synthesis of other nanostructured materials.

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Structural, optical and ferroelectric properties of V doped ZnO

Cited by 74 publications

References 24 publications

Microemulsion synthesis, optical and photocatalytic properties of vanadium‐doped nano ZnO

Microemulsion synthesis, optical and photocatalytic properties of vanadium‐doped nano ZnO

Influence of Mg Doping on ZnO Nanoparticles for Enhanced Photocatalytic Evaluation and Antibacterial Analysis

Facile synthesis of high yield two dimensional zinc vanadate nanoflakes

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