ساخت و بررسی خواص مغناطیسی و فوتوکاتالیستی نانوکامپوزیت فریت نیکل اصلاح شده با سولفید روی

نوع مقاله : مقاله پژوهشی

نویسنده

گروه مهندسی مکانیک،دانشکده فنی و مهندسی، دانشگاه پیام نور، تهران، ایران

چکیده

در این پژوهش، نانوچندسازه با ساختار هسته-پوسته متشکل از فریت نیکل و سولفید روی به روش شیمیایی سریع، با هدف بالا بردن خواص فوتوکاتایستی ساخته شد و در ناحیه فرابنفش مورد بررسی قرار گرفت. بنابراین، ابتدا نمونه‌های حاوی نانوذرات فریت نیکل (NiFe2O4) با روش هم رسوبی  سنتز شدند، سپس، نانوچندسازه NiFe2O4-Zns با قطرهایی با اندازه متوسط 66 نانومتر ساخته شدند. ریخت شناسی و ریزساختار نانوکامپوزیت های تولید شده با استفاده از پراش پرتو ایکس (XRD)، میکروسکوپ الکترونی روبشی(SEM) و میکروسکوپ الکترونی عبوری (TEM) مورد بررسی قرار گرفت. آنالیزهای XRD  نشان می‌دهند که نانوساختارهای ساخته شده دارای ساختاری با فاز غالب بلوری است. خصوصیات مغناطیسی نانوذرات و نانوچندسازه‌های تهیه شده در دمای اتاق با استفاده از دستگاه مغناطیس‌سنج گرادیان نیروی متناوب (AGFM) مورد بررسی قرار گرفت. نمونه‌ نانوچندسازه‌های تولید شده با استفاده از طیف سنج نوری فرابنفش-مرئی (UV-Vis) و اثر مقدار ماده جاذب و مدت زمان پرتودهی روی درصد کاهش غلظت رنگ محلول‌ها مورد بررسی قرار گرفت که نتایج حاصل شده نشان می‌دهد تغییرات قله‌های جذب رنگ‌های اسید سیاه، اسید آبی و متیل نارنجی مورد آزمایش، در حضور نانوچندسازه بطور خیلی محسوسی کاهشی بوده که تاییدی بر اثر خاصیت فوتوکاتالیستی نانوچندسازه تولید شده است، بطوریکه در نهایت منجر به کاهش در غلظت رنگ‌های به کار گرفته شده است.

کلیدواژه‌ها


عنوان مقاله [English]

Fabrication and study of magnetic and photocatalytic properties of nickel ferrite nanocomposite modified with zinc sulfide

نویسنده [English]

  • Hamid Mozafari
Department of Mechanical Engineering, Faculty of Engineering, Payame Noor University, Tehran, Iran
چکیده [English]

In this study, nanocomposites with core-shell structure consisting of nickel ferrite and zinc sulfide were fabricated by rapid chemical method with the aim of enhancing the photocatalytic properties and were investigated in the ultraviolet region. Therefore, first samples containing nickel ferrite nanoparticles (NiFe2O4) were synthesized by co-precipitation method, then NiFe2O4-Zns nanocomposite with average diameters of 66 nm was made. The morphology and microstructure of the nanocomposites produced were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). XRD analyzes show that the constructed nanostructures have a structure with a crystalline dominant phase. The magnetic properties of nanoparticles and nanocomposites prepared at room temperature were investigated using an alternating force gradient magnetometer (AGFM). The sample of nanocomposites produced using ultraviolet-visible (UV-Vis) optical spectrometer and the effect of the amount of adsorbent and irradiation time on the percentage reduction of dye concentration of solutions were investigated. The aqueous and methyl orange acids tested in the presence of the nanocomposite were significantly reduced, which is confirmed by the photocatalytic properties of the nanocomposite, which ultimately led to a reduction in the concentration of dyes used.

کلیدواژه‌ها [English]

  • Nanocomposite
  • zinc sulfide
  • core-shell structure
  • Nickel Ferrite
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