مشخصه‌های ساختاری، فوتولیزوری و مغناطیسی نانوکامپوزیت هوا ژل گرافن/فریت بیسموت

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه شهید چمران اهواز

چکیده

در این پژوهش، نانوکامپوزیت هواژل گرافن/فریت بیسموت به­روش گرمابی تهیه و ویژگی­های فوتولیزوری و مغناطیسی آن بررسی شد. هواژل نانو کامپوزیت‌ها با غلظت mg/ml ۴ برای اکسید گرافن و با غلظت­های 2/0 و 5/0 وmg/ml ۱ برای فریت بیسموت تهیه شد. بررسی‌های فازی و ساختاری بر پایه پراش پرتوس ایکس (XRD) و طیف­سنجی تبدیل فوریه فروسرخ (FT-IR) تأیید کننده تشکیل فریت بیسموت با ساختار سه­گوشی R از نوع پروسکایت و احیاء شدن اکسید گرافن است. تصویرهای میکروسکپ الکترونی روبشی (SEM) ساختار متخلخل هواژل گرافن را به­خوبی نشان ‌داد. تصویرهای میکروسکپ الکترونی عبوری (TEM)  تأییدی بر کامپوزیت شدن ذرات فریت بیسموت در ساختار هواژل گرافن بودند. گاف انرژی نمونه­ها با بررسی نتایج طیف­سنجی فرابنفش-مرئی (UV-Vis) محاسبه شد. نتایج به دست آمده از مغناطیس­سنج نمونه ارتعاشی (VSM) نشان دهنده کاهش مغناطش اشباع ذرات فریت بیسموت پس از کامپوزیت شدن با هواژل گرافن است. میزان تجزیه رنگ آبی متیل توسط ذرات فریت بیسموت و هواژل‌های نانوکامپوزیت‌های گرافن/ فریت بیسموت با طیف­سنج UV-Vis بررسی شد. بهترین عملکرد فوتولیزوری مربوط به­نمونه هواژل گرافن/ فریت بیسموت با مقدار فریت بیسموت mg/ml ۵/۰ است.    

کلیدواژه‌ها

عنوان مقاله [English]

Structural, photocatalytic and magnetic characteristics of aerogel graphene/bismuth ferrite nanocomposite

نویسندگان [English]

  • Mousavi
  • Zargar Shoushtari
  • Mousavi Ghahfarokhi
چکیده [English]

In this research, Graphene/ Bismuth aerogel nanocomposite was fabricated by hydrothermal method and it’s structural, magnetic and photocatalytic properties were investigated. For this purpose, aerogel of nanocomposites were prepared with a concentration of 4 for graphene oxide and concentrations of 0.2, 0.5 and 1 mg/ml for Bismuth ferrite. Phase and structural studies with XRD and FT-IR analyzes confirm the formation of bismuth ferrite with a rhombohedral structure of perovskite type and reduction of graphene oxide. The SEM images show the porous structure of graphene aerogel well. TEM analysis confirms the composite of bismuth ferrite nanoparticles in the structure of graphene aerogel. The energy gap of the samples was calculated from the results of UV-Visible spectroscopy. Based on the parameter measured by the vibrating sample magnetometer (VSM), it shows a decrease in the magnetization saturation of bismuth ferrite nanoparticles after composite with graphene aerogel. Methyl blue decomposition was evaluated by bismuth ferrite nanoparticles and graphene/ferrite bismuth nanocomposites using UV-Vis apparatus. The best photocatalytic performance of graphene/bismuth ferrite aerogel is in the sample with 0.5 mg/ml concentration.
 

کلیدواژه‌ها [English]

  • Aerogel grapheme
  • bismuth ferrite
  • hydrothermal
  • Methylene blue
  • nanocomposite

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  • تاریخ دریافت: 07 مهر 1400
  • تاریخ بازنگری: 29 آبان 1400
  • تاریخ پذیرش: 14 آذر 1400

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