سنتز و بررسی کارایی فتوکاتالیستی نانوچندسازهSnO2 دکوریت شده با ZnO تخریب در 2و4-دی‌کلروفنل

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه مهندسی شیمی، دانشکده فنی، دانشگاه گیلان، رشت

چکیده

در این پژوهش، نانوذرات SnO2 خالص و SnO2-ZnO با نسبت وزنی (5/0: 1)، (1:1)، (1:2) و (1:3) به روش سل‎ژل سنتز شدند. ساختار، ریخت­ شناسی، طیف جذب و فعالیت فتوکاتالیستی نانوذرات با استفاده از آنالیزها XRD، FE-SEM و
طیف­ سنجی UV-Vis مورد بررسی قرار گرفت. بر اساس آنالیز XRD، اندازه کریستالی نانوذرات SnO2 و SnO2-ZnO به ترتیب 14 و 10 نانومتر به دست آمد. تصاویر FE-SEM نشان داد که اندازه ذرات در حدود 30-10 نانومتر است. فعالیت فتوکاتالیستی نانوذرات با تخریب آلاینده آلی 2و4-دی‌کلروفنل تحت تابش فرابنفش (UV) بررسی شد. نتایج تجربی نشان داد که نانوذرات (1:2) SnO2-ZnO  با تخریب برابر با 44/56 درصد دارای بالاترین عملکرد فتوکاتالیستی است. بررسی‌های سینتیکی نشان داد که تخریب فتوکاتالیستی 2و4-دی‌کلروفنل از معادله سینتیک مرتبه اول پیروی می‌کند.

کلیدواژه‌ها


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