تهیه نانوپودر ایتریا آلائیده‌‌ شده با Nd3+ و+La3 به‌روش سل-ژل احتراقی

نویسندگان

1 1- دانشکده مهندسی مواد، دانشگاه صنعتی مالک اشتر، شاهین شهر، اصفهان

2 2- دانشکده شیمی، دانشگاه صنعتی اصفهان

چکیده

در این تحقیق، نانوپودر ایتریا آلائیده‌‌ شده با لانتانیم و نئودیمیم به‌روش سل-ژل احتراقی تهیه شد. اسید سیتریک و گلایسین به‌ترتیب به‌عنوان عامل ژل­ساز و احتراق استفاده شد. تأثیر نسبت ­­های مولی اسید سیتریک به گلایسین بر اندازه­ و مورفولوژی دانه ­ها بررسی شد. برای ارزیابی نمونه­ بهینه شده از آزمون­ های پراش‌سنج پرتوایکس (XRD)، تصاویر میکروسکوپی الکترونی روبشی گسیل میدانی (FESEM)، میکروسکوپ الکترونی عبوری (TEM)، تجزیه حرارتی (TG-DTA)، طیف­بینی مادون قرمز با تبدیل فوریه (UV-Vis) و طیف­بینی تبدیل فوریه مادون‌ قرمز (FTIR) استفاده شد. نمونه بهینه، با استفاده از نسبت مولی اسید سیتریک به گلایسین برابر با ۰۶/۱: ۰۶/۱، دارای محدوده اندازه­دانه ۴۰-۳۰ نانومتر و مورفولوژی کاملاً کروی است و هم‌چنین فاقد آگلومره بوده و تراز ­انرژی فرعی برابر با ۲۹/۳ الکترون ولت دارد.

کلیدواژه‌ها


عنوان مقاله [English]

Synthesis of La3+ and Nd3+ co-Doped Yttria Nanopowder by Sol-Gel Combustion Method

نویسندگان [English]

  • S. Shirinparvar 1
  • R.S. Razavi 1
  • R.S. Razavi 1
  • F. Davar 2
  • F. Davar 2
  • M.R. Loghman-Estarki 1
  • S. Ghorbani 1
1
2
چکیده [English]

In this research, the nanopowders of lanthanum and neodymium co-doped yttria were synthesized by sol-gel combustion method. Citric acid and glycine were used as the gel maker and fuel respectively. The effect of molar ratio of citric acid to glycine on the grain size and morphology was evaluated. The optimized products were characterized by X-ray diffraction (XRD), field-emission scanning electron microscope (FESEM), transmission electron microscope (TEM), UV–visible (UV–Vis), thermal gravimetric-differential thermal analysis (TG/DTA), and Fourier transform infrared spectrometer (FTIR). The optimized products which are synthesized with a molar ratio citric acid to glycine 1.06:1.06 have an average grain size of 30-40nm with spherical morphology, and without agglomeration. Also, their band gap is 3.29eV.

کلیدواژه‌ها [English]

  • Lanthanum and neodymium co-doped yttria
  • Citric acid
  • Glycine
  • Sol-gel combustion
  • morphology
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