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