نوع مقاله : مقاله پژوهشی
نویسندگان
- طاهر یوسفی 1
- رامین یاوری 1
- محمد قنادی مراغه 1
- سیدجواد احمدی 1
- هادی ملک محمد 2
- احمد قریب گرکانی 2
- حسین قاسمی مبتکر 1
1 1. پژوهشکده‌ی مواد و سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران ـ ایران
2 2. گروه فیزیک و مهندسی انرژی، دانشگاه صنعتی امیرکبیر، صندوق پستی: 1591634311، تهران ـ ایران
چکیده
نانوساختارهای اورانیا با استفاده از یک روش نهشت ساده، تمیز و قابل اجرا در دو زمان نهشت متفاوت تهیه شد. ساختارها و ریخت‌شناسی محصول‌ها با استفاده از تکنیک پراش پرتو ایکس (XRD) و میکروسکوپی الکترون پویشی (SEM) مشخصه‌یابی شدند. ریزنگارهای میکروسکوپی الکترون پویشی نشان دادند که ریخت‌شناسی نمونه‌ی تهیه شده در مدت زمان نهشت 10 دقیقه دارای ساختار یکنواخت سکه مانند با ابعاد نانومتر (قطر صفحه‌ها حدود 400- 600nm، متوسط ضخامت صفحه‌ها حدود 80nm) است. هم‌چنین نتیجه‌ها نشان دادند که زمان نهشت بر ریخت‌شناسی محصول‌ها تأثیرگذار و بر ساختار بلوری آن‌ها بی‌تأثیر است. الگوی پراش پرتو ایکس، ساختار نمونه‌ها را به صورت بلور UO2 تعیین کرد. ترکیب شیمیایی نقاط مختلف سطح نمونه با تکنیک طیف‌سنجی پراش انرژی پرتو ایکس (EDS) تعیین شد و یافته‌ها وجود ترکیب اورانیم اکسید را تأیید نمود. خاصیت‌های هم‌افزایی سطح الکترود و یون‌های اورانیم مسوول شکل‌گیری ساختار منحصربه‌فرد و جدید نمونه هستند.
کلیدواژه‌ها
عنوان مقاله [English]
Electrochemical synthesis of urania coin-like nanoparticles in aqueous media
نویسندگان [English]
- T Yousefi 1
- R Yavari 1
- M Ghannadi Maragheh 1
- S.J Ahmadi 1
- H Malek Mohammad 2
- A Gharib 2
- H Ghasemi Mobtaker 1
چکیده [English]
Urania nanostructures were synthesized by a facile, which is a simple and clean and straightforward deposition method, for two different deposition time durations. The morphology and structures of the products were characterized by the X-ray diffraction analysis (XRD) and Scanning Electronic Microscopy (SEM). The SEM images indicated that the morphology of the synthesized samples for 10 minutes was composed of a coin-like structure with a nano-scale dimension in a narrow- size distribution. The results indicated that the deposition time affects the morphology while it does not affect the structure. The XRD results identified the sample structures as UO2 crystal. The chemical composition of different points of the sample surface was determined by the energy dispersive spectroscopy (EDS) technique and the results clarified that the samples have a homogeneous composition of uranium oxide. The synergistic properties of the substrate surface, and uranium ions are responsible for the formation of an outstanding and a novel structure.
کلیدواژه‌ها [English]
- Coin- like nanostructure
- Urania
- Deposition
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