ساخت نانوکامپوزیت‌ Fe2O3/ZnO با استفاده از روش سنتز احتراقی محلول در تبدیل فتوکاتالیستی گازهای گلخانه‌ای

نوع مقاله: مقاله پژوهشی

نویسندگان

مرکز تحقیقات کاتالیست، گروه مهندسی شیمی، دانشکده فنی و مهندسی، دانشگاه رازی، کرمانشاه، ایران

چکیده

در این تحقیق با استفاده از روش سنتز احتراقی محلول، مجموعه‌ای از نانو کامپوزیت‌های Fe2O3/ZnO به‌عنوان فتوکاتالیست‌ فعال در نور مرئی، با 3 درصد ترکیب وزنی متفاوت از Fe2O3 شامل 25، 50 و 75 % ساخته شدند. ساختار، خواص نوری و ریخت‌شناسی سطح نانوکامپوزیت‌ها به‌وسیله آنالیز‌های XRDا، FESEMا، EDXا، FTIRا، PL و UV-vis مورد بررسی قرار گرفت. نتایج این آنالیزها نشان داد که خصوصیات ریخت‌شناسی، اندازه ذرات و خواص نوری نانوکامپوزیت‌های Fe2O3/ZnO به شدت به محتوای Fe2O3 وابسته است. فتوکاتالیست‌های ساخته شده به‌صورت مستقیم برای تبدیل فتوکاتالیستی گازهای گلخانه‌ای کربن‌دی‌اکسید و متان در یک رآکتور ناپیوسته، تحت تابش نور مرئی به کار گرفته شدند. نانوکامپوزیت Fe2O3/ZnO محتوای 75% وزنی Fe2O3 با اندازه ذرات nm 17 در تبدیل فتوکاتالیستی کربن‌دی‌اکسید و متان، به‌ترتیب تبدیل 16 و 21% از خود نشان داد که نسبت به فتوکاتالیست خالص ZnO با درصد تبدیل فتوکاتالیستی کربن‌دی‌اکسید و متان برابر با 3 و 4% عملکرد قابل توجهی بود.
 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Synthesis of Fe2O3/ZnO Nanocomposites by Solution Combustion Method for Photocatalytic Conversion of Greenhouse Gases CO2 and CH4

نویسندگان [English]

  • Mona Akbari
  • Shahram Sharifnia
Catalyst Research Center, Chemical Engineering Deptment, Razi University, Kermanshah, Iran
چکیده [English]

A series of visible light sensitive photocatalysts of Fe2O3/ZnO composites with different Fe2O3 contents (25, 50, and 75wt%) were successfully prepared by a solution combustion method. The material structure and morphology of photocatalysts and their optical properties have been examined using X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), energy dispersive X-ray analysis (EDX), photoluminescence (PL) spectra, and diffuse reflectance UV–visible spectroscopy. The characterization results showed that the morphology, crystallite size, and optical properties of Fe2O3/ZnO composites varied significantly with the Fe2O3 contents. The as-synthesized photocatalysts were used for direct photocatalytic conversion of greenhouse gases (CO2 and CH4) in a batch photoreactor, under visible light irradiation. The highest rates of photocatalytic conversion of CO2 and CH4 by Fe2O3/ZnO nanocomposite were 16% and 21% respectively.
 

کلیدواژه‌ها [English]

  • Greenhouse Gases
  • Photocatalyst
  • Nanocomposite
  • Solution Combustion Method
  • Fe2O3
  • ZnO

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