مطالعۀ ‌ساخت نانوذرات آلومینات استرانسیوم و آلایش با دیسپروزیوم

نوع مقاله: مقاله پژوهشی کامل

نویسندگان

1 عضو هیأت علمی

2 گروه فیزیک، دانشکده علوم، دانشگاه شهید چمران اهواز، اهواز، ایران

3 Shahid Chamran University of Ahvaz Ahvaz, Khuzestan, Iran Join institution

چکیده

در این پژوهش، ساخت نانوذرات آلومینات استرانسیوم (SrAl2O4) به روش احتراقی به کمک مایکروویو و آلایش آنها با دیسپروزیوم (SrAl2O4:Dy) مورد بررسی قرار گرفته است. مشخصه یابی نانوذرات با روش های XRD،FT-IR ،EDS ،FESEM ، UV-Vis و PL انجام شد. در مرحلة ساخت، الگوهای پراش پرتوی ایکس تشکیل آلومینات استرانسیوم با تقارن تک میلی و گروه فضایی P1211 را در نمونه با نسبت سوخت به نیترات 3 به 1، مقدار pH برابر با 5/5، زمان 5 دقیقه تابش دهی در مایکروویو، زمان پخت 1 ساعت و دمای پخت 600 درجة سانتی گراد تأیید کرد. با استفاده از داده های حاصل از پراش پودری پرتوی ایکس و فرمول شرر، متوسط اندازة نانوبلورک ها حدود 26 نانومتر به دست آمد. در مرحلة جانشینی، درصدهای مختلف آلایش با دیسپروزیوم، به منظور بهینه سازی فوتولومینسانس نانوذرات SrAl2O4 بررسی شد. در میان نانوذرات ساخته-شده، نانوذرات Sr0.9Al2O4:Dy0.1 با متوسط اندازة نانوذرات 3±34 نانومتر، پهنای توزیع فراوانی 30 تا 35 نانومتر، گاف اپتیکی01/0±21/4 الکترون ولت و دارا بودن بیشترین شدت نشر در طیف فوتولومینسانس، به عنوان نمونة بهینه از لحاظ خواص ساختاری و نوری شناخته شدند.

کلیدواژه‌ها


عنوان مقاله [English]

A study on Synthesis of strontium aluminate nanoparticles and doping with dysprosium

نویسندگان [English]

  • Somayeh Baham Bakhtiari 2
  • Mohammad Sabaeian 3
2 Department of Physics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
3 Department of Physics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
چکیده [English]

In this research, the synthesis of strontium aluminate nanoparticles (SrAl2O4) by using of combustion method assisted by microwave and doping them with dysprosium (SrAl2O4:Dy) have been investigated. Characterization of nanoparticles was performed by XRD, FT-IR, EDS, FESEM, UV-Vis and PL. In the synthesis stage, the data of XRDs confirmed the formation of the monoclinic phase of strontium aluminate with space group P1211, in the sample with the fuel to nitrate ratio of 3 to 1, pH value of 5.5, and microwave irradiation time of 5 minutes, calcination time of an hour and calcination temperature of 600 °C. By using the X-ray powder diffraction data and Scherrer's formula, the average size of nanocrystallites was obtained about 26 nm. In the substitution stage, in order to optimize the luminescence of SrAl2O4 nanoparticles, different percentages of doping were investigated. Among the synthesized nanoparticles, the sample of Sr0.9Al2O4: Dy0.1 nanoparticles with the average nanoparticles size 34±3 nm; most frequent distribution of nanoparticles between 30 and 35 nm; optical gap energy equal to 4.21 ± 0.01 eV and with the highest emission intensity in photoluminescence spectrum, was chosen as an optimal sample in terms of the structural and optical properties.

کلیدواژه‌ها [English]

  • Nanophosphorescence
  • Strontium aluminate
  • Microwave combustion method
  • Dysprosium
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