سنتز نانوکامپوزیت ZnO/SnO2 بارگذاری شده با نقره به روش تلقیح مایع و بررسی فعالیت نوری آن در حذف یک آلاینده محیط زیست تحت تابش نور مرئی
محورهای موضوعی : ارزیابی خطرات آلاینده ها بر روی محیط زیست
1 - دانش آموخته دکتری شیمی کاربردی، دانشکده شیمی، واحد اراک، دانشگاه آزاد اسلامی، اراک، ایران
کلید واژه: ZnO/SnO2, Ag-ZnO/SnO2, هم‌رسوبی, تلقیح مایع, فعاليت فوتوكاتاليزوري, اسید قرمز 27,
چکیده مقاله :
در این تحقیق ابتدا نانوکامپوزیت ZnO/SnO2 به روش هم‌رسوبی سنتز شده، سپس نقره با درصدهای مختلف به روش تلقیح مایع بر روی نانوکامپوزیت بارگذاری شده است. فعاليت فوتوكاتاليزوري مواد سنتز شده در حذف يك آلاینده رنگزا (اسید قرمز 27) تحت نور مرئي مورد ارزيابي قرار گرفته است. مشخصه‌یابی مواد با استفاده از روش‌های XRD و SEM-EDX انجام گرفته است. با استفاده از آنالیزهای مذکور اندازه ذرات، فازهای تشکیل دهنده و همچنین مورفولوژی ذرات بدست آمده است. نتایج فعاليت فوتوكاتاليزوري نشان مي‌دهد كه نانوکامپوزیت Ag-ZnO/SnO2 فعاليت بیشتری نسبت به نانوکامپوزیت ZnO/SnO2 در حذف اسید قرمز 27 (AR27) را دارد. بیشترین فعاليت فوتوكاتاليزوري مربوط به نانوکامپوزیت Ag-ZnO/SnO2 با %5 وزنی نقره و دمای کلسیناسیون oC500 می‌باشد بطوریکه درصد حذف AR27 تحت تابش نور مرئي به مدت 50 دقيقه %95 می‌باشد.
In this research, ZnO/SnO2 nanocomposite was first synthesized using the co-precipitation method, followed by the loading of silver at different percentages onto the nanocomposite via the liquid impregnation method. The photocatalytic activity of the synthesized materials in the removal of a dye pollutant (C.I. Acid Red 27) was evaluated under visible light. Material characterization was conducted using XRD and SEM-EDX methods. Through these analyses, the particle size, constituent phases, and morphology of the particles were determined. The photocatalytic activity results showed that the Ag-ZnO/SnO2 nanocomposite exhibited higher activity than the ZnO/SnO2 nanocomposite in pollutant removal. The highest photocatalytic activity was observed in the Ag-ZnO/SnO2 nanocomposite with 5% wt. silver and a calcination temperature of 500°C, achieving a 95% removal of Acid Red 27 after 50 min of irradiation.
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