Structural and optical properties of europium-doped zinc oxide nanopowders prepared by mechanochemical and combustion reaction methods

2012 ◽  
Vol 36 (1) ◽  
pp. 43-51 ◽  
Author(s):  
T.B. Ivetić ◽  
M.R. Dimitrievska ◽  
I.O. Gúth ◽  
Lj.R. Đačanin ◽  
S.R. Lukić-Petrović
Keyword(s):  
Zinc Oxide ◽  
Optical Properties ◽  
Diffuse Reflectance Spectroscopy ◽  
Synthesis Method ◽  
High Energy ◽  
Combustion Reaction ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Zno Powders ◽  
Energy Ball

Abstract Zinc oxide nanoparticles doped with europium were obtained by high energy ball milling followed by heat treatment and combustion reaction synthesis method starting from its microcrystalline powders. The influence of the preparation method approach and europium doping on the structural and optical properties of ZnO powders was investigated by X-ray diffraction, Raman and diffuse reflectance spectroscopy

scholarly journals Zinc Oxide Synthesis from Extreme Ratios of Zinc Acetate and Zinc Nitrate: Synergistic Morphology

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 570
Author(s):  
Sujittra Kaenphakdee ◽  
Pimpaka Putthithanas ◽  
Supan Yodyingyong ◽  
Jeerapond Leelawattanachai ◽  
Wannapong Triampo ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Optical Properties ◽  
Zinc Acetate ◽  
Near Infrared ◽  
Synergistic Effects ◽  
Zinc Nitrate ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Oxide Powders ◽  
Zno Powders

The synthesis of ZnO comprising different ratios of zinc acetate (ZA) and zinc nitrate (ZN) from the respective zinc precursor solutions was successfully completed via a simple precipitation method. Zinc oxide powders with different mole ratios of ZA/ZN were produced—80/1, 40/1, and 20/1. The crystallinity, microstructure, and optical properties of all produced ZnO powders were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-Vis-NIR spectrophotometry. The average agglomerated particle sizes of ZnO-80/1, ZnO-40/1, and ZnO-20/1 were measured at 655, 640, and 620 nm, respectively, using dynamic light scattering (DLS). The optical properties of ZnO were significantly affected by the extreme ratio differences in the zinc precursors. ZnO-80/1 was found to have a unique coral-sheet structure morphology, which resulted in its superior ability to reflect near-infrared (NIR) radiation compared to ZnO-40/1 and ZnO-20/1. The NIR-shielding performances of ZnO were assessed using a thermal insulation test, where coating with ZnO-80/1 could lower the inner temperature by 5.2 °C compared with the neat glass substrate. Due to the synergistic effects on morphology, ZnO-80/1 exhibited the property of enhanced NIR shielding in curtailing the internal building temperature, which allows for its utilization as an NIR-reflective pigment coating in the construction of building envelopes.

scholarly journals Influence of Gd Doping on the Structural and Optical Properties of ZnO

2015 ◽  
Vol 773-774 ◽  
pp. 672-676 ◽  
Author(s):  
Nurul Fadzilah Ab Rasid ◽  
Siti Nooraya Mohd Tawil ◽  
Che Ani Norhidayah ◽  
Mohd Zainizan Sahdan
Keyword(s):  
Zinc Oxide ◽  
Optical Properties ◽  
Rare Earth ◽  
Metal Ion ◽  
Earth Metal ◽  
Rare Earth Ions ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Zinc Oxide Films ◽  
Atomic Force

Doping transition metal or rare-earth metal ion are one of the most popular topics in semiconductors. In this work, gadolinium (Gd) doped zinc oxide thin films was prepared using spin-coating technique with different concentrations in atomic percent (at.%). The influences of rare-earth ions doped into the zinc oxide films were studies. The effects on the physical and optical properties of the films were investigated by field emission scanning electron microscope, x-ray diffraction, atomic force microscopic and ultraviolet-visible spectrophotometer. It was found that the properties of zinc oxide can be tuned by changing the concentration physical and optical of Gd.

Crystal Structure and Optical Characterizations of Titanium-Doped Zinc Oxide Thin Films for Organic Photovoltaic Applications

2013 ◽  
Vol 834-836 ◽  
pp. 100-103 ◽  
Author(s):  
Zhi You Zhong ◽  
H. Wang ◽  
T. Zhang ◽  
C. Lan ◽  
S.B. Chen
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Optical Properties ◽  
Crystal Structures ◽  
Crystal Size ◽  
Titanium Content ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Sintered Ceramic ◽  
Photovoltaic Applications

Thin films of transparent conducting titanium-doped zinc oxide (TZO) were deposited by radio-frequency magnetron sputtering technique using a sintered ceramic target of ZnTiO3. The structural and optical properties of the thin films were characterized with X-ray diffraction and spectrophotometer. The results show that the polycrystalline TZO thin films consist of the hexagonal crystal structures withc-axis as the preferred growth orientation normal to the substrate, and that the titanium doping level significantly affects the crystal structures and optical properties of the thin films. The TZO film deposited with the titanium content of 3 wt% has the relatively well crystallinity, the largest crystal size and the highest average visible transmittance. Furthermore, the optical constants and optical energy gaps of the thin films were determined by optical characterization method.

Evolution of Structural and Optical Properties in TiO2 Nanoparticles Prepared by High-Energy Ball Milling

2014 ◽  
Vol 20 (3) ◽  
pp. 612-616 ◽  
Author(s):  
B. B. Tripathy ◽  
P. K. Sahoo ◽  
D. K. Mishra ◽  
S. K. S. Parashar ◽  
N. C. Mishra
Keyword(s):  
Optical Properties ◽  
Tio2 Nanoparticles ◽  
Ball Milling ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Structural And Optical Properties ◽  
Energy Ball

Structural and optical properties of Tin Oxide and Indium doped SnO2 thin films deposited by thermal evaporation technique

2016 ◽  
Vol 12 (3) ◽  
pp. 4394-4399
Author(s):  
Sura Ali Noaman ◽  
Rashid Owaid Kadhim ◽  
Saleem Azara Hussain
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Tin Oxide ◽  
Thermal Evaporation ◽  
Pure Sno2 ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Evaporation Technique ◽  
Sno2 Thin Films

Tin Oxide and Indium doped Tin Oxide (SnO2:In) thin films were deposited on glass and Silicon  substrates  by  thermal evaporation technique.  X-ray diffraction pattern of  pure SnO2 and SnO2:In thin films annealed at 650oC and the results showed  that the structure have tetragonal phase with preferred orientation in (110) plane. AFM studies showed an inhibition of grain growth with increase in indium concentration. SEM studies of pure  SnO2 and  Indium doped tin oxide (SnO2:In) ) thin films showed that the films with regular distribution of particles and they have spherical shape.  Optical properties such as  Transmission , optical band-gap have been measured and calculated.

scholarly journals Effects of Recycled Fe2O3 Nanofiller on the Structural, Thermal, Mechanical, Dielectric, and Magnetic Properties of PTFE Matrix

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2332
Author(s):  
Ahmad Mamoun Khamis ◽  
Zulkifly Abbas ◽  
Raba’ah Syahidah Azis ◽  
Ebenezer Ekow Mensah ◽  
Ibrahim Abubakar Alhaji
Keyword(s):  
Electron Microscopy ◽  
High Energy ◽  
Filler Loading ◽  
Complex Permeability ◽  
X Ray Diffraction ◽  
Thermal Expansion Coefficients ◽  
Transmission Electron ◽  
Energy Ball ◽  
Hematite Fe2o3 ◽  
Ptfe Composites

The purpose of this study was to improve the dielectric, magnetic, and thermal properties of polytetrafluoroethylene (PTFE) composites using recycled Fe2O3 (rFe2O3) nanofiller. Hematite (Fe2O3) was recycled from mill scale waste and the particle size was reduced to 11.3 nm after 6 h of high-energy ball milling. Different compositions (5–25 wt %) of rFe2O3 nanoparticles were incorporated as a filler in the PTFE matrix through a hydraulic pressing and sintering method in order to fabricate rFe2O3–PTFE nanocomposites. The microstructure properties of rFe2O3 nanoparticles and the nanocomposites were characterized through X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and high-resolution transmission electron microscopy (HRTEM). The thermal expansion coefficients (CTEs) of the PTFE matrix and nanocomposites were determined using a dilatometer apparatus. The complex permittivity and permeability were measured using rectangular waveguide connected to vector network analyzer (VNA) in the frequency range 8.2–12.4 GHz. The CTE of PTFE matrix decreased from 65.28×10−6/°C to 39.84×10−6/°C when the filler loading increased to 25 wt %. The real (ε′) and imaginary (ε″) parts of permittivity increased with the rFe2O3 loading and reached maximum values of 3.1 and 0.23 at 8 GHz when the filler loading was increased from 5 to 25 wt %. A maximum complex permeability of 1.1−j0.07 was also achieved by 25 wt % nanocomposite at 10 GHz.

Influence of Cd doping on structural and optical properties of (Cd, Al)-codoped ZnO powders synthesized via sol–gel method

2015 ◽  
Vol 645 ◽  
pp. 529-534 ◽  
Author(s):  
Libing Duan ◽  
Xiaoru Zhao ◽  
Yajun Wang ◽  
Hao Shen ◽  
Wangchang Geng ◽  
...  
Keyword(s):  
Optical Properties ◽  
Sol Gel ◽  
Structural And Optical Properties ◽  
Gel Method ◽  
Sol Gel Method ◽  
Cd Doping ◽  
Zno Powders

scholarly journals Structural and optical properties of SnO2–Al2O3 nanocomposite synthesized via sol-gel route

2015 ◽  
Vol 33 (4) ◽  
pp. 714-718 ◽  
Author(s):  
Neeraj K. Mishra ◽  
Chaitnaya Kumar ◽  
Amit Kumar ◽  
Manish Kumar ◽  
Pratibha Chaudhary ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Optical Properties ◽  
Sol Gel ◽  
Physical Interaction ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
X Ray ◽  
Sensing Applications ◽  
Scanning Electron

AbstractA nanocomposite of 0.5SnO2–0.5Al2O3 has been synthesized using a sol-gel route. Structural and optical properties of the nanocomposite have been discussed in detail. Powder X-ray diffraction and scanning electron microscopy with energy-dispersive X-ray diffraction spectroscopy confirm the phase purity and the particle size of the 0.5SnO2–0.5Al2O3 nanocomposite (13 to 15 nm). The scanning electron microscopy also confirms the porosity in the sample, useful in sensing applications. The FT-IR analysis confirms the presence of physical interaction between SnO2 and Al2O3 due to the slight shifting and broadening of characteristic bands. The UV-Vis analysis confirms the semiconducting nature because of direct transition of electrons into the 0.5SnO2–0.5Al2O3 nanocomposites.

Structural and Optical Properties of Al Co-Doped ZnCoO Thin Film

2014 ◽  
Vol 989-994 ◽  
pp. 656-659
Author(s):  
Ping Cao ◽  
Yue Bai
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Al Doping ◽  
X Ray ◽  
Uv Emission ◽  
Uv Absorption Spectroscopy ◽  
Co Doped

Al co-doped ZnCoO thin film has been prepared by a sol-gel method. The structural and optical properties of the sample were investigated. X-ray diffraction and UV absorption spectroscopy analyses indicate that Al3+ and Co2+ substitute for Zn2+ without changing the wurtzite structure. With the Al doping, the visible emission increased and the UV emission decreased, which is attributed to the increase of O vacancies and Zn interstitials.

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