Structural and electronic properties of Co-doped ZnO nanocrystals synthesized by co-precipitation method

Nanosized Mn doped ZnO samples were synthesized by co-precipitation method using Polyethylene glycol (PEG) as a capping agent. X- ray diffraction patterns confirm that the pure and Mn doped ZnO nanocrystals have wurtzite structure without any seconadary phases. Lattice parameters of pure and Mn doped ZnO nanocrystals increase slightly with increasing Mn concentration. The average crystalline size of pure and Mn doped ZnO nanocrystals are in the range of 14-18 nm. The X-ray density for pure and Mn doped ZnO sample is calculated using lattice parameters. It is found that almost static for Mn doped ZnO samples. In the Zn1-xMnx samples, room temperature magnetic hysteresis is observed and the saturation magnetization increases with increasing Mn content. However, these samples show room temperature ferromagnetic in nature. Result of the present investigation compared without PEG.

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Preparation and Characterization of Ag and Co Doped ZnO Nano Particles

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.584.248 ◽

2012 ◽

Vol 584 ◽

pp. 248-252

Author(s):

B. Sankara Reddy ◽

S. Venkatramana Reddy ◽

R.P. Vijaya Lakshmi ◽

N. Koteeswara Reddy

Keyword(s):

Blue Emission ◽

Photo Luminescence ◽

Hexagonal Structure ◽

Nano Particles ◽

Precipitation Method ◽

X Ray Diffraction ◽

X Ray ◽

Doped Zno ◽

Co Precipitation ◽

Co Doped

Pure ZnO and Ag, Co doped ZnO nano particles [Zn1-xAgxCoyO, where x = 0.00 and 0.05, y = 0.05] were synthesized by chemical co precipitation method without use of surfactant. All the prepared samples calcinated in 1 hour at 500oC, after that the morphology of the samples were evaluated by Scanning Electron Microscope (SEM). The X- ray diffraction (XRD) results indicated that the synthesized co-doped ZnO nano crystals had the pure hexagonal structure without any significant change in the structure affected by Ag and Co substitution. Dopant elements Ag and Co are present in the ZnO host material and conformed by Energy Dispersive Analysis of X-ray Spectra (EDAX). The incorporation of Ag+ in the place of Zn2+ has made a considerable decrease in the size of nano crystals as compared to pure ZnO nano particles (It is to be noted that Co should be kept constant at 5 mol %). Blue emission was observed by Photo Luminescence (PL) Spectra.

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Synthesis, structural and optical properties of pure ZnO and Co doped ZnO nanoparticles prepared by the co-precipitation method

Journal of Theoretical and Applied Physics ◽

10.1007/s40094-016-0221-0 ◽

2016 ◽

Vol 10 (3) ◽

pp. 233-240 ◽

Cited By ~ 36

Author(s):

P. Geetha Devi ◽

A. Sakthi Velu

Keyword(s):

Optical Properties ◽

Zno Nanoparticles ◽

Precipitation Method ◽

Structural And Optical Properties ◽

Doped Zno ◽

Co Precipitation ◽

Co Doped

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Physical Properties and Photocatalytic Activity of Fe- and Co-Doped ZnO Nanoparticles Synthesized via Surfactant Modified Co-Precipitation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1123.241 ◽

2015 ◽

Vol 1123 ◽

pp. 241-246 ◽

Cited By ~ 1

Author(s):

Annisa Noorhidayati ◽

Siti Adriani ◽

Rosari Saleh

Keyword(s):

Photocatalytic Activity ◽

Diffuse Reflectance Spectroscopy ◽

Uv Light ◽

Sodium Dodecyl ◽

Precipitation Method ◽

Resonance Spectroscopy ◽

Dopant Atom ◽

Doped Zno ◽

Co Precipitation ◽

Co Doped

Fe- and Co-doped ZnO with various doping concentrations have been synthesized by co-precipitation method in the presence of sodium dodecyl sulfate as anionic surfactant. The obtained sample powders were characterized by X-ray diffraction, Fourier transform infrared absorption, UV-visible diffuse reflectance spectroscopy, electron spin resonance spectroscopy and Brunauer-Emmet-Teller (BET) method. The photocatalytic activity was evaluated by observing the decolorization of methylene blue under UV light irradiation. The results revealed that the addition of a dopant atom significantly enhanced the photocatalytic activity.

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Synthesis and Crystallographic Study of Co Doped ZnO Nano-Sized Powders by Co-Precipitation Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.678.113 ◽

2013 ◽

Vol 678 ◽

pp. 113-117

Author(s):

Vishwanath D. Mote ◽

Babasaheb N. Dole

Keyword(s):

Precipitation Method ◽

Lattice Constants ◽

Peak Broadening ◽

Average Grain Size ◽

Crystallite Sizes ◽

Individual Contributions ◽

Doped Zno ◽

Co Precipitation ◽

The Individual ◽

Co Doped

Co doped ZnO samples having composition Zn1-xCoxO (x= 0.00, 0.10 and 0.20) were synthesized by co-precipitation method. X- ray diffraction analysis reveals that the Co doped ZnO nanopowders crystallize in wurtzite structure without any impurity phases. The lattice constants of ZnO nanoparticles decrease slightly with increasing Co concentration. The average grain size of the Co doped ZnO nanopowders are in the range of 33-36 nm. The Williamson – Hall (W-H) analysis used to study the individual contributions of crystallite sizes and lattice strain on the peak broadening of the pure and Co doped ZnO nanopowders. The results shown that the grain sizes of the samples estimated from the W-H analysis were highly inter-correlated. The strain of the samples was estimated using W-H analysis and it is found that it goes on decreasing with enhancing Co content.

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Structural and optical properties of Co-doped ZnO nano-ampoules synthesized by co-precipitation method

Materials Letters ◽

10.1016/j.matlet.2016.12.124 ◽

2017 ◽

Vol 190 ◽

pp. 9-12 ◽

Cited By ~ 8

Author(s):

Darshan Sharma ◽

Ranjana Jha

Keyword(s):

Optical Properties ◽

Precipitation Method ◽

Structural And Optical Properties ◽

Doped Zno ◽

Co Precipitation ◽

Co Doped

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Effect of Ni doping on structural, optical and photocatalytic properties of Zn1-XNiXO nanoparticles prepared by different pH conditions

JOURNAL OF ADVANCES IN CHEMISTRY ◽

10.24297/jac.v12i6.5524 ◽

2013 ◽

Vol 12 (6) ◽

pp. 4097-4107 ◽

Cited By ~ 6

Author(s):

R. Jeyachitr ◽

N. Sriharan ◽

V. Senthilnathan ◽

T. S. Senthil

Keyword(s):

Average Crystallite Size ◽

Hexagonal Wurtzite Structure ◽

Photocatalytic Properties ◽

Precipitation Method ◽

Ni Doping ◽

Zno Nanocrystals ◽

Structure Morphology ◽

Ph Conditions ◽

Doped Zno ◽

Co Precipitation

Zn1-XNiXO (x = 0.00, 0.02, 0.04 & 0.06 mol %) nanoparticles were prepared by simple co-precipitation method. The influences of Ni doping on structure, morphology, optical and photocatalytic properties were investigated by means of Xray diffraction, scanning electron microscopy, UV–Vis spectrophotometer and photochemical reaction method. The obtained result shows that the prepared ZnO nanocrystals were hexagonal wurtzite structure and the average crystallite size decreases with increase of Ni doping. The increase of visible light absorption and increase of band gap were found with the increase of Ni doping concentration, which enable the sample harvest more photons to excite the electron from valence band. The photocatalytic properties of Ni doped ZnO nanocrystals shows enhanced activity that the pure ZnO nanocrystals. The photocatalytic activities were not significantly affected by the particle size and 0.04% Ni doped ZnO nanocrystals shows best catalytic activity than the other catalysts.

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