X-ray diffraction, X-ray photoelectron spectroscopy, and raman spectroscopy of undoped and Mn-doped ZnO nanoparticles prepared by microwave irradiation

2013 ◽  
Vol 79 (6) ◽  
pp. 901-907 ◽  
Author(s):  
Bindiya H. Soni ◽  
M. P. Deshpande ◽  
Sandip V. Bhatt ◽  
Sunil H. Chaki ◽  
Vasant Sathe
Keyword(s):  
Raman Spectroscopy ◽  
Microwave Irradiation ◽  
Zno Nanoparticles ◽  
Photoelectron Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Doped Zno ◽  
Mn Doped

scholarly journals STRUCTURAL CHARACTERIZATION OF Co-DOPED ZnO NANOPARTICLES USING X-RAY DIFFRACTION AND RAMAN SPECTROSCOPY

2015 ◽  
Author(s):  
T. J. Castro ◽  
S. W. da Silva ◽  
F. Nakagomi ◽  
A. Franco Júnior ◽  
H. V. S. Pessoni ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Structural Characterization ◽  
Zno Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Doped Zno ◽  
Co Doped

The Influence of Montmorillonite Incorporation in Mn-Doped ZnO Nanoparticles for Photocatalytic Degradation of Organic Dyes

2015 ◽  
Vol 1112 ◽  
pp. 194-200
Author(s):  
Nadia Febiana Djaja ◽  
Rosari Saleh
Keyword(s):  
Zno Nanoparticles ◽  
Diffuse Reflectance Spectroscopy ◽  
Organic Dyes ◽  
Uv Light ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Doped Zno ◽  
Co Precipitation ◽  
Mn Doped

The present study compares the photocatalytic decolorization ability of bare Mn-doped ZnO and montmorillonite modified Mn-doped ZnO nanoparticles towards aqueous solution of organic dyes (methylene blue and malachite green) under UV light irradiation. Both photocatalysts were synthesized using co-precipitation method and characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, Fourier-transform infrared absorption, electron spin resonance, and diffuse reflectance spectroscopy. Comparison of degradation efficiency demonstrated that montmorillonite modified Mn-doped ZnO nanoparticles exhibited higher activity than bare Mn-doped ZnO nanoparticles.

scholarly journals Oxygen Defects Mediated Magnetism of Ni Doped ZnO

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
W. J. Liu ◽  
X. D. Tang ◽  
Z. Tang ◽  
W. Bai ◽  
N. Y. Tang
Keyword(s):  
Zno Nanoparticles ◽  
Photoelectron Spectroscopy ◽  
Crucial Role ◽  
Oxygen Vacancies ◽  
Defect Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxygen Defects ◽  
Solution Route ◽  
Doped Zno

Ni doped ZnO nanoparticles were synthesized by a solution route and annealed in O2, air, and Ar, respectively. X-ray diffraction and X-ray photoelectron spectroscopy measurements show that the samples possess typical wurtzite structure and have no other impurity phases. Magnetization loops for ZnO samples were measured and clearly show typical ferromagnetic saturation behavior. With the defect analysis based on photoluminescence spectroscopy, the effect of defects on the nature and origin of ferromagnetism was investigated. The results suggest that oxygen vacancies, especially single ionized oxygen vacancies, play a crucial role in mediating ferromagnetism in the Ni doped ZnO.

STRUCTURAL, OPTICAL AND MAGNETIC INVESTIGATIONS ON UNDOPED AND Mn-DOPED ZnO NANOPARTICLES

2010 ◽  
Vol 09 (05) ◽  
pp. 495-502 ◽  
Author(s):  
N. RAJKUMAR ◽  
K. RAMACHANDRAN
Keyword(s):  
Zno Nanoparticles ◽  
Photoelectron Spectroscopy ◽  
Spherical Particles ◽  
Precipitation Method ◽  
Chemical Compositions ◽  
Secondary Phases ◽  
X Ray ◽  
Doped Zno ◽  
Co Precipitation ◽  
Mn Doped

Undoped and Mn (1 and 3 at.%) doped ZnO nanoparticles were synthesized by a simple chemical co-precipitation method. Rietveld refinement of X-ray diffraction (XRD) data revealed that undoped and Mn doped ZnO nanoparticles crystallize in the monophasic wurtzite structure and monotonous expansion of the lattice constants with increasing Mn content, due to the effective Mn doping. TEM images of all the samples showed the monodispersive spherical particles with the size of ~7 nm. The quantum confinement of nanoparticles was tested from UV–Vis absorbance measurement and the particle sizes were calculated and compared with TEM and XRD. The chemical compositions were analyzed by energy dispersive spectroscopy (EDS). In order to investigate the origin of ferromagnetism, the electronic structures of the Zn , O , and Mn atoms were probed by X-ray photoelectron spectroscopy (XPS). XPS data revealed that most of the dopants (Mn) exists in +2 oxidation state for 3 at.% Mn doped ZnO sample. The magnetization curves of the Mn doped ZnO samples indicate the existence of room-temperature ferromagnetic (RTFM) behavior. Here the observed RTFM in Mn doped ZnO can be attributed to the substitutional incorporation of Mn at Zn sites rather than due to the formation of any secondary phases.

scholarly journals Synthesis, structural and optical properties of Mn doped ZnO nanoparticles and their antibacterial application

2016 ◽  
Vol 12 (12) ◽  
pp. 4593-4600
Author(s):  
A. Srithar ◽  
J.C. Kannan ◽  
T.S. Senthil
Keyword(s):  
Electron Microscopy ◽  
Optical Properties ◽  
Zno Nanoparticles ◽  
Hexagonal Wurtzite Structure ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Doped Zno ◽  
Mn Doped

In the present investigation, MnxZn1-xO (x = 0.05, 0.075 and 0.1%) nanoparticles have been synthesized by simple precipitation method. Their structural, morphological and optical properties were examined by using X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Energy dispersive X-ray spectroscopy (EDX), High resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, Differential scanning calorimetry (DSC) and UV-Visible spectroscopy. The Powder X-ray diffraction studies confirmed that the manganese doped ZnO have a single phase nature with hexagonal wurtzite structure and Mn successfully incorporated into the lattice position of Zn in ZnO lattice. The FESEM and HRTEM images are coincided with each other for aggregation of particles in nature. The elemental analysis of doped samples has been evaluated by EDX. The antibacterial activity of Mn doped ZnO nanoparticles has also been examined.

Magnetic Properties of Bulk Zn0.95-XMnXFe0.05O2 Prepared by Sol-Gel Method and Subsequent Hot Pressing

2011 ◽  
Vol 268-270 ◽  
pp. 356-359 ◽  
Author(s):  
Wen Song Lin ◽  
C. H. Wen ◽  
Liang He
Keyword(s):  
Magnetic Properties ◽  
Photoelectron Spectroscopy ◽  
Raw Materials ◽  
Sol Gel ◽  
Secondary Phase ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Doped Zno

Mn, Fe doped ZnO powders (Zn0.95-xMnxFe0.05O2, x≤0.05) were synthesized by an ameliorated sol-gel method, using Zn(CH3COO)2, Mn(CH3COO)2and FeCl2as the raw materials, with the addition of vitamin C as a kind of chemical reducer. The resulting powder was subsequently compacted under pressure of 10 MPa at the temperature of 873K in vacuum. The crystal structure and magnetic properties of Zn0.95-xMnxFe0.05O2powder and bulk samples have been investigated by X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). X-ray photoelectron spectroscopy (XPS) was used to study chemical valence of manganese, iron and zinc in the samples. The x-ray diffraction (XRD) results showed that Zn0.95-xMnxFe0.05O (x≤0.05) samples were single phase with the ZnO-like wurtzite structure. No secondary phase was found in the XRD spectrum. X-ray photoelectron spectroscopy (XPS) showed that Fe and Mn existed in Zn0.95-xMnxFe0.05O2samples in Fe2+and Mn2+states. The results of VSM experiment proved the room temperature ferromagnetic properties (RTFP) of Mn, Fe co-doped ZnO samples.

Formation of ZnO Doped with Mn Thin Film by Electrodeposition and Magnetic Behaviour.

2005 ◽  
Vol 879 ◽  
Author(s):  
M. Abid ◽  
C. Terrier ◽  
J-P Ansermet ◽  
K. Hjort
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Room Temperature ◽  
Magnetic Behaviour ◽  
Spectroscopic Methods ◽  
X Ray Diffraction ◽  
X Ray ◽  
Doped Zno ◽  
Mn Doped ◽  
Weak Ferromagnetic

AbstractFollowing the theory, ferromagnetism is predicted in Mn- doped ZnO, Indeed, ferromagnetism above room temperature was recently reported in thin films as well as in bulk samples made of this material. Here, we have prepared Mn doped ZnO by electrodeposition. The samples have been characterized by X-ray diffraction and spectroscopic methods to ensure that the dopants are substitutional. Some samples exhibit weak ferromagnetic properties at room temperature, however to be useful for spintronics this material need additional carriers provided by others means.

Study of Bactericidal Properties of Mg-Doped ZnO Nanoparticles

2015 ◽  
Vol 1804 ◽  
pp. 31-36 ◽  
Author(s):  
Melina Perez-Altamar ◽  
Hilary Marrero ◽  
Milton Martínez Julca ◽  
Oscar Perales Perez
Keyword(s):  
Infrared Spectroscopy ◽  
Zno Nanoparticles ◽  
Plate Count ◽  
Exciton Peak ◽  
X Ray Diffraction ◽  
Uv Spectrum ◽  
X Ray ◽  
Bactericidal Properties ◽  
Doped Zno ◽  
Mg Doped

ABSTRACTThe present work focuses on the polyol-mediated synthesis of pure and Mg-doped ZnO nanoparticles. The synthesized samples were characterized via X-ray diffraction, Fourier transformed infrared spectroscopy, ultraviolet visible spectroscopy and photoluminescence techniques. The Standard Plate Count was used to assess the bactericidal properties of the nanoparticles against E. coli at 1000 ppm and 1500 ppm of concentration. The capacity of the Zn-Mg oxides to generate singlet oxygen (SO) species was also evaluated. X-ray diffraction information evidenced the formation of ZnO-wurtzite; no diffraction peaks corresponding to isolated Mg-phases were detected. The average crystallite size of the Zn-Mg oxide nanocrystals was estimated in the 6nm - 7nm range. Infrared spectroscopy measurements confirmed the formation of the oxide with a Metal-Oxygen band centered on 536 cm-1; other bands associated to the functional groups of polyol by product were also observed. The exciton peak of UV spectrum suggests similarity in the particle size with the dopant addition. The effect of particle composition (i.e. doping level) on the corresponding generation of SO and bactericidal capacity is presented and discussed.

Sign in / Sign up

Export Citation Format

Share Document