تجزیه کاتالیزوری نوری رنگزای متیل اورانژ با استفاده از نانومیله‌های روی اکسید/ الیاف پلی آکریلو نیتریل

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه شیمی‌فیزیک و نانو، دانشکده شیمی، دانشگاه الزهرا، تهران، ایران صندوق پستی: 93973-19938

2 گروه شیمی‌فیزیک و نانو، دانشکده شیمی، دانشگاه الزهرا، تهران، ایران، صندوق پستی: 93973-19938

چکیده

در این پژوهش نانومیله‌های روی اکسید (ZnO) با روش رسوب‌دهی حمام شیمیایی بر روی دو نوع از نانو الیاف الکتروریسی شده پلی آکریلو نیتریل(PAN)  به منظور تجزیه کاتالیزوری نوری رنگزای متیل اورانژ (MO) رشد داده شد. به منظور دستیابی به بالاترین سرعت تجزیه کاتالیزوری نوری ساختارهای مختلفی از ZnO با تغییر مشخصه‌های رشد نانومیله­ها از جمله زمان رشد، غلظت محلول رشد و زیر لایه رشد با استفاده از طراحی آزمایش‌ها به روش Design of Expert (DOE) مورد بررسی قرار گرفت. الگوی پرتو ایکس (XRD) ساختار بلوری ورﺗﺴﺎﯾﺖ و آنالیز طیف‌سنجی بازتابی نفوذی (DRS) شکاف انرژی eV 3.2 را برای ZnO نشان داد. همچنین نمونه بهینه‌سازی شده با زمان رشد 10 ساعت و غلظت 62.5 میلی‌مولار از محلول رشد روی نیترات و هگزا متیلن تتراآمین (HMTA)، ثابت سرعت تجزیه(k)  min-1 0.0038 را نشان داد.  انعطاف­پذیری، بازیابی سریع و راحت کاتالیزور نوری از پساب تصفیه­شده، همچنین سنتز آسان و ارزان نوید بخش کاربردهای عملیاتی نمونه‌های سنتز شده است.

کلیدواژه‌ها


عنوان مقاله [English]

Photocatalytic Degradation of Methyl Orange Dye Using Zinc Oxide Nanorods/polyacrylonitrile Fibers

نویسندگان [English]

  • Leyla Alizadeh Asl 1
  • Morasae Samadi 2
1 Department of Physical Chemistry and Nanochemistry, Faculty of Chemistry, Alzahra University, P.O. Box: 19938-93973, Tehran, Iran
2 Department of Physical Chemistry and Nanochemistry, Faculty of Chemistry, Alzahra University, P.O. Box: 19938-93973, Tehran, Iran
چکیده [English]

In this research, zinc oxide (ZnO) nanorods were grown by chemical bath deposition method on two types of electrospun polyacrylonitrile (PAN) nanofibers for photocatalytic decomposition of methyl orange dye. Various structures of ZnO were investigated to achieve the maximum rate of photocatalytic degradation by adjusting the growth variables of nanorods, including growth time, concentration of growth solution, and growth substrate, using the design of Expert (DOE) technique. The X-ray diffraction (XRD) pattern of the sample confirmed the wurtzite crystal structure, and diffuse reflectance spectroscopy (DRS) analysis showed an energy gap of 3.2 eV for ZnO. Also, the optimized sample with a growth time of 10 hours and a concentration of 62.5 mM of zinc nitrate and hexamethylenetetramine (HMTA) showed a decomposition rate constant (k) of 0.0038 min-1. Flexibility, quick and convenient recovery of photocatalyst from treated wastewater, and easy and cheap synthesis method promise the operational applications of the synthesized samples.

کلیدواژه‌ها [English]

  • Electrospinning
  • Photocatalyst
  • Nanocomposite
  • Semiconductor
  • Flexible membrane
  • Polyacrylonitrile
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