فهرس المقالات Mn-doped

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  1 - The effect of Mn doping on structural, magnetic and optical properties of TiO2 nanoparticles
  alireza razeghizadeh elham elahi vahdat rafee
  10.22034/jna.2018.553380.1053
  The aim of this paper is to study the effect of Mn concentration on the structural, magnetic and optical properties of TiO2 nanoparticles. TiO2 nano powders with Mn concentration of 0%, 0.2%, 1% and 5% were synthesized by the sol-gel method. The structural, surface morp أکثر

  The aim of this paper is to study the effect of Mn concentration on the structural, magnetic and optical properties of TiO2 nanoparticles. TiO2 nano powders with Mn concentration of 0%, 0.2%, 1% and 5% were synthesized by the sol-gel method. The structural, surface morphology and average crystal grain size, optical, magnetic properties and chemical compounds of the samples are studied using XRD, FE-SEM, Uv-Vis, VSM and EDX analysis respectively. The results indicate that the samples are crystallized at anatase phase. Also, the average size of the nanoparticles is decreased by increasing Mn doping percent. The study of the optical properties shows that the absorption maximum dislocates toward higher wavelengths by adding Mn to the sample. This shift may be ascribed to the enhanced trapped electron absorption caused by the Mn-doped ions. The optical energy band gap of the doping samples shows significant reduction rather the pure state. The samples show significant paramagnetic behavior when the Mn concentration is 5%. تفاصيل المقالة
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  2 - The effect of Mn doping on structural, magnetic and optical properties of TiO2 nanoparticles
  Alireza Razeghizadeh Elham Elahi Vahdat Rafee
  10.22034/jna.2018.541852
  The aim of this paper is to study the effect of Mn concentration on the structural, magneticand optical properties of TiO2 nanoparticles. TiO2 nanopowders with Mn concentration of 0%,0.2%, 1% and 5% were synthesized by the sol-gel method. The structural, surface morphol أکثر

  The aim of this paper is to study the effect of Mn concentration on the structural, magneticand optical properties of TiO2 nanoparticles. TiO2 nanopowders with Mn concentration of 0%,0.2%, 1% and 5% were synthesized by the sol-gel method. The structural, surface morphologyand average crystal grain size, optical, magnetic properties and chemical compounds of thesamples are studied using XRD, FE-SEM, Uv-Vis, VSM and EDX analysis respectively. The resultsindicate that the samples are crystallized at anatase phase. Also, the average size of thenanoparticles is decreased by increasing Mn doping percent. The study of the optical propertiesshows that the absorption maximum dislocates toward higher wavelengths by adding Mnto the sample. This shift may be ascribed to the enhanced trapped electron absorption causedby the Mn-doped ions. The optical energy band gap of the doping samples shows significantreduction rather the pure state. The samples show significant paramagnetic behavior whenthe Mn concentration is 5%. تفاصيل المقالة
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  3 - Optical and photocatalytic properties Undoped and Mn-doped ZnO nanoparticles synthesized by hydrothermal method: Effect of annealing temperature
  Maryam Bordbar Seyed Mohammad Vasegh Somaye Jafari Ali Yeganeh Faal
  Undoped and Mn-doped ZnO nanoparticles were successfully prepared by the hydrothermal method with different annealing temperature conditions. Structural, chemical and optical properties of the samples were studied by X-ray diffraction (XRD), Field Emission scanning elec أکثر

  Undoped and Mn-doped ZnO nanoparticles were successfully prepared by the hydrothermal method with different annealing temperature conditions. Structural, chemical and optical properties of the samples were studied by X-ray diffraction (XRD), Field Emission scanning electron microscopy (FESEM), UV-Vis spectrophotometry and Fourier transform infrared (FT-IR) spectroscopy. The phase purity was confirmed by X-ray powder diffraction (XRD) and XRD spectra showed that all the samples were hexagonal wurtzite structure and as the annealing temperature increases the material becomes less crystalline. In addition, the average crystal size was found to be 15-30 nm from SEM and XRD. It is seen that the optical band gap increases when the ZnO is doped with manganese and decreases when annealing temperature increases. The photoacatalytic activity of Undoped and Mn-doped ZnO nanoparticles was tested by the degradation of metyl orang (MO) under UV light and indicated that Mn-doped ZnO has higher photocatalytic activity relative to ZnO nanoparticles and photocatalytic activity decreases when annealing temperature increases. تفاصيل المقالة