سنتز نانوکامپوزیت La2CoFe2O7 و کاربرد کاتالیزوری نوری آن برای حذف رنگ‌های آلی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه شیمی، دانشگاه پیام نور، تهران، ایران، صندوق پستی: 4697-19395

2 گروه شیمی، واحد زاهدان، دانشگاه آزاد اسلامی، زاهدان، ایران، صندوق پستی: 978-98135

3 آزمایشگاه مرکزی، مجتمع آموزش عالی فنی و مهندسی اسفراین، اسفراین، خراسان شمالی، ایران، کد پستی:9661998195

چکیده

پساب کارخانه­‌های نساجی یکی از مهم‌ترین منابع آلودگی محیط‌زیست می‌‌باشد، بنابراین تصفیه این پساب‌ها ضروری است. از این­رو تجزیه مواد رنگ‌زا با استفاده از کاتالیزورهای نوری که یکی از فرآیندهای اکسایش پیشرفته می‌باشد، مورد مطالعه قرار گرفته است. کار حاضر سنتز نانوکامپوزیت اکسید فلزات مختلط مغناطیسی (LCoFO) La2CoFe2O7 به عنوان کاتالیزور نوری موثر را با روش هم‌رسوبی معرفی می‌کند. اکسید فلزی سنتز شده با طیف‌سنجی زیر قرمز (FT-IR)، الگوی پراش پرتو ایکس (XRD) و میکروسکوپ الکترونی عبوری (TEM) شناسایی شد. دستگاه مغناطیس‌سنج گرادیان نیروی متناوب (AGFM) رفتار مغناطیسی نانوکامپوزیت LCoFO را نشان می‌دهد. در این تحقیق، خواص کاتالیزوری نوری نانوکامپوزیت­های LCoFO با استفاده از تجزیه نوری متیل ویولت (MV)، مالاشیت گرین اگزالات (MG) و اریوکروم بلک تی (EBT) تحت تابش پرتو نور فرابنفش و عوامل مختلف از قبیل دما، pH محلول، غلظت رنگ‌زا، مقدارکاتالیزور و زمان تابش نور UV بررسی شد. نتایج نشان داد که این نانو کامپوزیت‌ها عملکرد کاتالیزوری نوری خوبی دارند.

کلیدواژه‌ها

عنوان مقاله [English]

Synthesis of La2CoFe2O7 Nanocomposite and its Photocatalytic Application to Remove Organic Dyes

نویسندگان [English]

  • somaye khammarnia 1
  • Jilla Saffari 2
  • Mehri-Saddat Ekrami-Kakhki 3
1 Chemistry Department, Payame Noor University, P.O. Box: 19395-4697, Tehran, Iran
2 Department of Chemistry, Zahedan Branch, Islamic AzadUniversity, P.O. Box: 98135-978, Zahedan, Iran
3 Esfarayen University of Technology, P.O. Code: 9661998195, Esfarayen, North Khorasan, Iran
چکیده [English]

Wastewater from textile factories is one of the most important sources of environmental pollution, so it is necessary to treat these wastewater. Therefore, the decomposition of colors using photocatalysts, which is one of the advanced oxidation processes, has been studied. The present work introduces the synthesis of the magnetic mixed metal oxide La2CoFe2O7 (LCoFO) nanocomposite as an effective photocatalyst by co-precipitation method. The synthesized metal oxide was characterized by infrared spectroscopy (FT-IR), X-ray diffraction pattern (XRD) and transmission electron microscopy (TEM). The alternating force gradient magnetometer (AGFM) shows the magnetic behavior of the LCoFO nanocomposite. In this research, the photocatalytic properties of LCoFO nanocomposites using photolysis of methyl violet (MV), malachite green oxalate (MG), and eriochrome black T (EBT) were investigated under ultraviolet light irradiation in different parameters such as temperature, solution pH, dye concentration, catalyst amount, and UV radiation time. The results showed that these nanocomposites have good photocatalytic performance.

کلیدواژه‌ها [English]

  • Magnetite nanoparticles Co
  • precipitation Photocatalyst Methyl violet Malachite green oxalate Eriochrome Black T

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