فعالیت فوتو‌کاتالیستی آلیاژ گرافیت-آهن-تیتانیوم برای حذف آلودگی رنگی؛ مطالعات سنتز، مشخصه‌یابی و بهینه‌یابی

نوع مقاله : مقاله پژوهشی کامل

نویسندگان

گروه فیزیک، دانشکده علوم و فناوری‌های نانو و زیستی، دانشگاه خلیج فارس، بوشهر، ایران

چکیده

در این پژوهش، حذف آلودگی رنگی، اریوکروم بلک-تی[1]، به‌‌‌‌وسیلة آلیاژ پودری گرافیت-آهن-تیتانیوم که به‌روش آلیاژسازی تهیه شده است، بررسی می‌شود. خواص ساختاری و نوری آلیاژها توسط پراش پرتو ایکس، میکروسکوپ الکترونی روبشی، طیف سنجی پراش انرژی پرتو ایکس و طیف سنجی مرئی-فرابنفش ارزیابی شدند. اندازه‌گیری پراش پرتو ایکس نشان می‌دهد، پس از 35 ساعت آسیاکاری، شدت قله‌‌‌‌های عناصر کاهش یافته و پهنای آنها نیز کاهش می‌یابد. اندازة متوسط بلورک آهن در حدود 8/50 نانومتر گزارش می‌شود. پس از اتمام آسیا‌کاری، مورفولوژی پودر‌ها به‌صورت ورقه‌ای شکل مشاهده می‌شود که مناسب برای فعالیت جذبی و فوتوکاتالیستی می‌باشد. پانزده آزمایش فوتوکاتالیستی، برای حذف آلودگی طراحی می‌شود و با استفاده از ترکیب الگوی شبکه عصبی مصنوعی و الگوی ژنتیک، بهینة شرایط حذف رنگ برایpH  ، توان نوردهی (وات) و مقدار فوتوکاتالیست (گرم بر لیتر) به‌دست می‌آید. با شرایط بهینه، بیشینة مقدار حذف رنگ، در حدود %4/86 گزارش می‌شود.
 
[1] Eriochrome Black T

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Photocatalytic activity of graphite-Fe-Ti alloy for the removal of dye pollutant: Synthesis, characterization and optimization studies

نویسندگان [English]

  • Saeid Zarei
  • Hossein Raanaei
Department of Physics, Faculty of Nano and Bio Science and Technology, Persian Gulf University, Bushehr, Iran
چکیده [English]

This research investigates the photocatalytic activity of mechanically alloyed graphite-iron-‌titanium powder for the removal of Eriochrome Black-T dye pollution. The structural and optical properties of the alloys are evaluated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray energy diffraction spectroscopy (EDX), and ultraviolet-visible spectroscopy (UV-vis). X-ray diffraction measurements show that after 35 hours of milling time, the intensity of the element’s peaks decreases, along with the increase of peaks width. The average iron crystallite size is estimated to be approximately 50.8 nanometers. The morphology of the alloyed powders shows that the particles are flattened and plate-like in shape, which is suitable for absorption and photocatalytic activities. Fifteen photocatalytic experiments are designed to remove dye pollution; the optimal dye removal’s parameters for pH, lamp power, and alloy dosage (g/L) are obtained using the combination of artificial neural network, and genetic algorithm (ANN-GA). With optimal conditions, the maximum removal rate is determined to about 86.4%.

کلیدواژه‌ها [English]

  • Mechanical alloying
  • Photocatalytic degradation
  • Artificial neural network
  • Dye removal
  • Carbon-based alloy
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