تأثیر غلظت پیش‌ماده فلزی بر شکل و اندازه نانو ذرات ساخته شده به‌وسیله عصاره گیاه

نویسندگان

1 1- گروه مواد- سرامیک، دانشکده فنی و مهندسی، دانشگاه شهرکرد

2 2- گروه زیست شناسی، دانشکده علوم پایه، دانشگاه شهرکرد

چکیده

نانو ذرات نقره، با استفاده از برگ‌های گیاه سیاه‌دانه به ­کمک روش‌های جدید بیولوژیکی ساخته  شد. بدین منظور ابتدا برگ‌های این گیاه در هوا خشک و سپس در آب مقطر جوشانده شد.  نتیجه آن مایعی بود که پس از فیلترکردن، برای احیای یون‌های نقره از محلول‌هایی با غلظت متفاوت از نیترات نقره و با pH ثابت به‌کار رفت. اندازه‌گیری‌های اسپکتروفتومتری، به کمک بررسی میزان تغییر رنگ محلول به‌سمت قهوه‌ای، شکل‌گیری نانو ذرات نقره را در هنگام ساخت  نشان داد.  نمونه‌های پودری به‌دست آمده بعد از مرحله سانتریفیوژ، به‌وسیله پراش پرتو ایکس (XRD)، تبدیل فوریه فروسرخ (FTIR)، میکروسکوپ الکترونی روبشی گسیل میدانی(FESEM) و طیف­سنجی پراش انرژی پرتو ایکس (EDX) مورد بررسی قرار گرفتند. نتایج اندازه‌گیری‌های شیمیایی و فازی به‌همراه تصاویر میکروسکوپی نشان‌دهنده ساخت نانو ذرات نقره کلوخه‌ای شکل با خلوص بالا است. افزون بر ‌این، اثرات تغییر غلظت نمک نقره اولیه بر اندازه نانو ذرات نقره به­وسیله اندازه‌گیری لیزری بررسی شد. نتایج تحلیل تبدیل فوریه فروسرخ نیز نقش گروه‌های عاملی موجود در عصاره گیاه را بر فرایند ساخت مشخص نمود.

کلیدواژه‌ها

عنوان مقاله [English]

Effets of Silver Salt Concentrations on Green Synthesis of Silver Nanoparticles Using the Plant Nigella Saliva

نویسندگان [English]

  • M.R. Saeri 1
  • M. Azizi1 1
  • R. Amooaghaie 2
1 1- Department of Materials Science, Faculty of Engineering, Shahrekord University, Shahrekord, Iran.
2 2- Department of Biology, Faculty of Science, Shahrekord University, Shahrekord, Iran.
چکیده [English]

Bio-inspired silver nanoparticles were synthesized with the aid of a novel method, using leaves of the plant Nigella sativa. After drying the leaves in air, they were first sweltered in boiling distilled water and the liquid was filtered subsequently. The result was the brothused to reduce solutions including various concentrations of silver nitrate in a proper amount of pH. The displayed UV–visible spectra identified formation of silver nanoparticles whenever the colorless initial acclimated mixture turned brown. The centrifuged powder samples were examined using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (FESEM) and energy dispersive X-ray diffraction analysis (EDX) methods. The results clearly revealed that the final particles of precipitated powder are high purity agglomerates of silver nanoparticles. Besides, the effects of various amounts of the silver salt on particle size of nano silver were studied, using a particle size analyzer. FTIR results also indicated the role of different functional groups in the synthetic process.

کلیدواژه‌ها [English]

  • silver nanoparticles
  • Green reduction
  • Broth
  • Nigella sativa
  • Concentration

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مواد پیشرفته در مهندسی
دوره 34، شماره 4
اسفند 1394
صفحه 33-41

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