نوع مقاله: مقاله پژوهشی

نویسندگان

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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