مطالعه ویژگی‌های ساختاری و اپتیکی نانوذرات اکسید تیتانیوم آلاییده با آهن

نوع مقاله: مقاله پژوهشی کامل

نویسندگان

1 گروه فیزیک، دانشکده علوم پایه، دانشگاه کوثر بجنورد، بجنورد، ایران

2 گروه فیزیک، دانشکده علوم، دانشگاه کوثر بجنورد

چکیده

در این پژوهش، نانوذرات اکسید تیتانیوم آلاییده با آهن در غلظت مولی Fe/Ti از 1 تا 10% و دمای بازپخت 400 تا oC800 توسط طیف سنجی پراش اشعه x ، تصویربرداری میکروسکوپ الکترونی تراگسیلی (TEM) و طیف سنجی بازتاب پخشی (DRS) مورد مطالعه قرار گرفت. اندازه نانوذرات سنتز شده با استفاده از تصویربرداری میکروسکوپ الکترونی تراگسیلی از 6 تا nm 100 تخمین زده شد. مطالعات اپتیکی طیف سنجی بازتاب پخشی نشان داد که آلایش اکسید تیتانیوم با فلزات واسطه می‌تواند اثر قابل توجهی بر روی ویژگی‌های جذبی نانوذرات اکسید تیتانیوم در ناحیه مرئی داشته ‌باشد. محاسبات گاف انرژی با استفاده از مشتق دوم نمودار تاک نشان می‌دهد که گاف انرژی برای نمونه‌های با مقدار ناخالصی بیشتر و بازپخت در دمای بالاتر می‌تواند کاهش یافته و به مقدار eV 5/2 برسد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Structural and optical properties of Fe doped TiO2 nanoparticles

نویسندگان [English]

  • Mahboubeh Yeganeh 1
  • Fatemeh Badieian Baghsiyahi 2
1 Department of Physics, Faculty of Natural Science, Kosar University of Bojnord, Bojnord, Iran
2 Department of Physics, Faculty of Natural Science, Kosar University of Bojnord
چکیده [English]

In this work, Fe doped TiO2 nanoparticles at different Fe/Ti molar ratio from 1 to 10% and different annealing temperature from 400 to 800 oC were investigated by X-ray diffraction spectroscopy, transmission electron microscopy (TEM) and diffuse reflectance spectroscopy (DRS). The size of prepared nanoparticles was estimated between 6 to 100 nm by transmission electron microscopy. The characterization by diffuse reflectance spectroscopy revealed that the optical absorption in the visible region significantly increased by doping of TiO2 nanoparticles.. The calculated gap energy by second derivative of Tauc plot demonstrated that the gap energy decreased to 2.5 eV for samples at higher Fe content and annealing temperature.

کلیدواژه‌ها [English]

  • TiO2 nanoparticles
  • Fe doped TiO2
  • optical properties
  • Diffuse reflectance spectroscopy
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