ساخت، مشخصه‌یابی و بررسی مقایسه‌ای خاصیت آنتی‌باکتریال نانو ذرات Ag-TiO2 و ZnO-TiO2


1 1- مرکز تحقیقات مواد پیشرفته ، دانشکده مهندسی مواد، دانشگاه آزاد اسلامی، واحد نجف آباد

2 2- گروه مهندسی مواد، دانشکده فنی- مهندسی، دانشگاه شهرکرد


اکسید تیتانیوم (TiO2) از جمله موادی است که به‌علت دارا بودن خواص مختلف از جمله زیست‌سازگاری، مقاومت اکسیداسیون قوی و خواص مکانیکی نسبتا خوب در مصارف زیستی و پزشکی کاربرد فراوان یافته است. امروزه با هدف افزایش کارایی اکسید تیتانیوم، ازآلایش این ماده با عناصری مانند نقره، روی و آهن استفاده می­شود. در این پژوهش، آلایش اکسید تیتانیوم با استفاده از نقره و روی از طریق فرایند سل-ژل انجام شد و نانو ذرات ترکیبات به‌دست آمده، مورد ارزیابی و مقایسه قرار گرفتند. برای شناسایی فاز­های تشکیل شده در ترکیبات Ag-TiO2 و ZnO-TiO2 در دماهای مختلف از آزمون پراش پرتوی ایکس استفاده شد. هم‌چنین برای مشخصه­یابی نانو ذرات از طیف سنجی جذب الکترونی مرئی- فرابنفش (UV-Vis)، توزیع انرژی پرتوی ایکس (EDS)، میکروسکوپ الکترونی روبشی گسیل میدانی (FE-SEM) و پتانسیل زتا استفاده شد. فعالیت آنتی باکتریال نانو ذرات نیز ارزیابی و مقایسه شد. نتایج نشان داد که نانو ذرات Ag-TiO2 و ZnO-TiO2 با ترکیب مورد انتظار به‌روش سل-ژل با موفقیت ساخته شدند. بررسی خواص آنتی باکتریال نشان داد که ترکیب Ag-TiO2 در غلظت­های بازدارندگی پایین‌تر، فعالیت آنتی باکتریال بالاتری نسبت به نانو ذرات ZnO-TiO2 ارائه می‌دهد.


عنوان مقاله [English]

Preparation, Characterization and Comparative Study of Antibacterial Properties of Ag-TiO2 and ZnO-TiO2 Nanoparticles

نویسندگان [English]

  • S. Yazdkhasti 1
  • A. Monshi 1
  • A. Doostmohammadi 2
چکیده [English]

With various features such as strong oxidation, biocompatibility and acceptable mechanical properties, titanium dioxide (TiO2) is among the materials that are frequently used in biological and medical applications. Nowadays, with the aim of increasing the efficiency of titanium dioxide and practical use of this material, doping it with elements such as silver, zinc and iron has been favored. In this study, Ag-TiO2 and ZnO-TiO2 nanoparticles were prepared by the sol–gel method and were evaluated and compared.In order to identify the present phases in the structure, X-ray diffraction analysis was used. Also for the characterization of the nanoparticles, Ultraviolet–visible spectroscopy (UV-Vis), Energy-dispersive X-ray spectroscopy (EDS), Field Emission Scanning Electron Microscope (FESEM) and Zeta Potential were used. Inaddition, the antibacterial activities of nanoparticles were investigated and compared. The results showed that sol-gel method could successfully produce nanoparticles of Ag-TiO2 and ZnO-TiO2 with the expected combination. The investigation of antibacterial properties of these particles revealed that at lower inhibitory concentrations, Ag-TiO2 composition has a higher antibacterial activity than ZnO-TiO2 one.

کلیدواژه‌ها [English]

  • titanium dioxide
  • Silver
  • zinc
  • Sol-gel
  • Antibacterial Properties
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