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Mohammadi, Robab. (1403). Investigation of the Effect of Polyaniline Content on the Catalytic Activity of Fe3O4/GO Nanocomposite. فصلنامه علمی زیست فناوری گیاهان زراعی, 12(1), 1-10. doi: 10.30473/ijac.2024.72388.1307
Robab Mohammadi. "Investigation of the Effect of Polyaniline Content on the Catalytic Activity of Fe3O4/GO Nanocomposite". فصلنامه علمی زیست فناوری گیاهان زراعی, 12, 1, 1403, 1-10. doi: 10.30473/ijac.2024.72388.1307
Mohammadi, Robab. (1403). 'Investigation of the Effect of Polyaniline Content on the Catalytic Activity of Fe3O4/GO Nanocomposite', فصلنامه علمی زیست فناوری گیاهان زراعی, 12(1), pp. 1-10. doi: 10.30473/ijac.2024.72388.1307
Mohammadi, Robab. Investigation of the Effect of Polyaniline Content on the Catalytic Activity of Fe3O4/GO Nanocomposite. فصلنامه علمی زیست فناوری گیاهان زراعی, 1403; 12(1): 1-10. doi: 10.30473/ijac.2024.72388.1307

Investigation of the Effect of Polyaniline Content on the Catalytic Activity of Fe3O4/GO Nanocomposite

Iranian Journal of Analytical Chemistry
دوره 12، شماره 1 - شماره پیاپی 23، خرداد 2025، صفحه 1-10
نوع مقاله: Full research article
شناسه دیجیتال (DOI): 10.30473/ijac.2024.72388.1307
نویسنده
Robab Mohammadi*
Department of Chemistry, Payame Noor University, P.O. box 19395-3697, Tehran, Iran
چکیده
In this research, Fe3O4, Fe3O4/graphene oxide (Fe3O4/GO) and polyaniline-Fe3O4/GO with various content of polyaniline were prepared and characterized by different analysis methods such as XRD, SEM, EDX, and FT-IR. The prepared samples were used to remove methyl red as an anionic dye from aqueous solutions. Polyaniline-Fe3O4/GO nanocomposite showed high catalytic activity, which is partly because of the sensitizing influence of polyaniline and the low recombination rate due to the graphene oxide electron scavenging property. The photodegradation reaction fit well to a Langmuir-Hinshelwood kinetic model implying the reaction rate is depended on initial adsorption step. Also, in polyaniline-Fe3O4/GO samples, the polyaniline content can play a significant role in affecting photocatalytic activity of photocatalysts. Based on results, when the content of polyaniline is more increased above its optimum value, the photocatalytic performance decreased. Furthermore, the efficiency of polyaniline-Fe3O4/GO nanocomposite was investigated to compare between adsorption and photodegradation of methyl red from aqueous solution. Based on results, the removal rate of methyl red via polyaniline-Fe3O4/GO nanocomposite under photocatalytic process was considerably higher than the adsorption process. To understand the nature of adsorption procedure, the equilibrium adsorption isotherms were investigated. The linear correlation coefficients of Langmuir and Freundlich isotherms were obtained. Based on results, Langmuir isotherm model fitted the experimental data better than Freundlich isotherm model. According to the Langmuir isotherm model, the maximum adsorption capacity of polyaniline-Fe3O4/GO nanocomposite for sequestering methyl red was about 101.72 mg g–1.
کلیدواژه‌ها
Polyaniline- Fe3O4/GO؛ Methyl Red؛ Photocatalytic Activity؛ Adsorption Process
عنوان مقاله [English]
بررسی تاثیر مقدار پلی آنیلین در فعالیت کاتالیزوری نانوکامپوزیت Fe3O4/GO
نویسندگان [English]
رباب محمدی
بخش شیمی، دانشگاه پیام نور، تهران، ایران
چکیده [English]
در این تحقیق Fe3O4/graphene oxide (Fe3O4/GO), Fe3O4    و polyaniline-Fe3O4/GO با مقادیر مختلفی از  پلی آنیلین تهیه و با روشهای آنالیزی مختلف نظیر EDX ,  SEM, XRD    و FT-IR مقایسه شدند.  از نمونه های تهیه شده برای حذف متیل رد به عنوان رنگ آنیونی از محلول های آبی استفاده شد.  نانوکامپوزیت polyaniline-Fe3O4/GOفعالیت کاتالیزوری بالاتری نشان داد  که تا حدودی به دلیل اثر حساس کنندگی  پلی آنیلین و سرعت پایین ترکیب مجدد حفره- الکترون به دلیل خاصیت الکترون کشندگی اکسید گرافن است. واکنش تخریب نوری با  مدل لانگمویر تطابق خوبی نشان داد که بیانگر وابستگی سرعت واکنش به مرحله جذب سطحی است. همچنین در  نانوکامپوزیت polyaniline-Fe3O4/GO  مقدار  پلی آنیلین نقش تعیین کننده ای در فعالیت فتوکاتالیزوری نمونه ها ایفا می کند.  بر اساس نتایج به دست آمده وقتی مقدار  پلی آنیلین از میزان بهینه بالاتر می رود  فعالیت کاتالیزوری کاهش می یابد.  همچنین  کارایی  نانوکامپوزیت polyaniline-Fe3O4/GO به منظورحذف متیل رد از طریق فرایندهای فتو کاتالیزوری و جذب سطحی مورد مقایسه قرار گرفت.  بر اساس نتایج به دست آمده سرعت حذف متیل رد از طریق فرایندهای فتو کاتالیزوری بیشتر است. برای تشخیص نوع ایزوترم جذب، ایزوترم های جذب لانگمویر و  فروندلیچ مورد مطالعه قرار گرفتند. مدل لانگمویر با داده های آزمایشگاهی تطابق خوبی نشان داد.  با توجه به مدل لانگمویر،  polyaniline-Fe3O4/GO بالاترین ظرفیت جذب متیل رد را با 101.72 میلی گرم در گرم نشان داد.
کلیدواژه‌ها [English]
نانوکامپوزیت polyaniline-Fe3O4/GO, متیل رد, فعالیت فتو کاتالیزوری, فرایند جذب سطحی
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آمار
تعداد مشاهده مقاله: 44
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