سنتز نانوذره¬های روی دی¬اکسید دوپه‌شده با نقره با دو روش ‏سل-ژل و هم¬رسوبی و مقایسه‌ ویژگی فیزیکی-شیمیایی و ‏فعالیت‌های پادباکتری آن¬ها

الموضوعات :

میترا شعبانی نیا ¹ (دانشجوی دکترای شیمی معدنی دانشگاه آزاد اسلامی واحدعلوم وتحقیقات . تهران.ایران)
منوچهر خراسانی ² (استاديار دانشکده مهندسی پلیمر و رنگ، دانشگاه صنعتی امیرکبیر، تهران، ‏ایران.‏)
سحر بنی یعقوب ³ (Department of chemistry, Science and research branch, Isalamic azad University, Tehran, Iran)

تاريخ الإرسال : 01 الأحد , شعبان, 1445 تاريخ التأكيد : 26 الخميس , شعبان, 1445 تاريخ الإصدار : 26 الجمعة , صفر, 1446

الکلمات المفتاحية: نانوذره¬های روی دی‌اکسید دوپه‌شده با نقره, سل-ژل, هم¬رسوبی, ویژگی ‏پاد¬باکتری,

ملخص المقالة :

       در این پژوهش، نانوذره­های روی دی­اکسید دوپه‎شده با نقره (Ag-ZnO) با دو روش سل-‌ژل و هم­رسوبی سنتز و ویژگی پادباکتری نانوذره­های ZnO و Ag-ZnO بررسی شدند. طیف­سنجی فروسرخ تبدیل فوریه (FTIR) گروه عاملی آن‌ها را شناسایی و تایید کرد که نقره با نانوذره­های روی اکسید دوپه ‌شده است. نتیجه­های به­دست‌آمده از پراش پرتو ایکس (XRD) ساختار ورتزیت شش‌ضلعی را برای نانوذره­های سنتزشده با هر دو روش نشان داد. بررسی ریخت‌ سطح و تعیین اندازه و ترکیب نانوذره­ها با میکروسکوپ الکترونی روبشی (SEM) انجام شد. تصویرهای SEM نشان­دهنده حضور نانوذره­های انبوهه‌شده در هر دو روش بود، ولی در روش سل-ژل ریخت­ نانوذره­ها به pH محلول پیش­ساز بستگی داشت. تغییر ریخت صفحه مانند به میله مانند زمانی­که pH محیط از ٧ به ١٠ افزایش ‌یافت، مشاهده شد. فعالیت‌های پادباکتری نانوذره­های سنتزشده علیه باکتری­های اشریشیا کلی به­عنوان باکتری گرم منفی و استافیلوکوکوس اورئوس به­عنوان باکتری گرم مثبت با روش انتشار دیسک ارزیابی و مشاهده شد که فعالیت پادباکتریZnO  با دوپه‌کردن Ag به­طور چشمگیری بهبود یافت. همچنین، این نانوذره­ها در مقابل باکتری‌های گرم مثبت ویژگی پادباکتری بیشتری نشان دادند.

المصادر:


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