بررسی کارایی نانوکامپوزیت BFO/g-C3N4 در حذف کاتالیزوری نوری رنگزای قرمز کنگو

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه شیمی، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران، صندوق پستی: 14515/775

2 گروه شیمی، دانشکده علوم پایه، واحد اهر، دانشگاه آزاد اسلامی، اهر، ایران، صندوق پستی: 14515/775

3 گروه شیمی، واحد تبریز، دانشگاه آزاد اسلامی، تبریز، ایران، صندوق پستی: 14515/775

چکیده

در این پژوهش، نانوکامپوزیت BFO/g-C3N4 توسط روش هیدروترمال سنتز شد. خواص ساختاری نانوکامپوزیت BFO/g-C3N4 با استفاده از XRD، FTIR، FESEM،  EDXو Dot Mapping آنالیز شد. به منظور اندازه‌گیری سطح ویژه و قطرحفرات نانو کامپوزیت BFO/g-C3N4 از آنالیزBET  و BJH استفاده شد. کارایی نانوکامپوزیت BFO/g-C3N4 به عنوان کاتالیزور نوری روی تخریب کاتالیزوری نوری رنگزا قرمزکنگو تحت نور مرئی ارزیابی شد. اثر فاکتورهای کلیدی شامل زمان، pH محلول، غلظت اولیه رنگزا قرمزکنگو و مقدار کاتالیزور نوری BFO/g-C3N4 بررسی شدند. نتایج نشان داد که درصد حذف رنگزا قرمزکنگو با افزایش زمان واکنش و مقدار نانوکامپوزیت BFO/g-C3N4، افزایش و با افزایش pH محلول و غلظت اولیه رنگزا قرمزکنگو، کاهش می‌یابد. بیشینه درصد حذف رنگزا قرمزکنگو در زمان واکنش 30 دقیقه،pH  محلول 2، غلظت اولیه رنگزا 10 میلی‌گرم بر لیتر، مقدار کاتالیزور نوری ml 100g/ 0.05 و شدت نورمرئی 30 وات به 74.66 درصد رسید. به طور کلی نتایج نشان داد که نانوکامپوزیت BFO/g-C3N4 یک کاتالیزور نوری بالقوه تحت نور مرئی در حذف کاتالیزوری نوری رنگزا قرمزکنگو زیر نور مریی است.

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of BFO/g-C3N4 Nanocomposite Efficiency on Photocatalytic Removal of Congo Red Dye

نویسندگان [English]

  • Mehrnaz Babaei Shekardasht 1
  • Mohammad Hadi Givianrad 1
  • Parvin Gharbani 2
  • Zohreh Mirjafary 1
  • Ali Mehrizad 3
1 Department of Chemistry, Science and Research Branch, Islamic Azad University, P.O. Box: 775/14515, Tehran, Iran
2 Department of Chemistry, Ahar Branch, Islamic Azad University, P.O. Box: 775/14515, Ahar, Iran
3 Department of Chemistry, Tabriz Branch, Islamic Azad University, P.O. Box: 775/14515, Tabriz, Iran
چکیده [English]

In this research, BFO/g-C3N4 nanocomposite was prepared via the hydrothermal method and was analyzed by FTIR, XRD, FESEM, Dot mapping, and EDS. BET and BJH techniques were used to determine the specific surface area and pore size of BFO/g-C3N4 nanocomposite. The efficiency of BFO/g-C3N4 nanocomposite as a photocatalyst was evaluated on photocatalytic degradation of Congo Red dye under visible light irradiation. The effect of key factors, i.e., time, pH of the solution, initial Congo Red concentration, and BFO/g-C3N4 dosage, was studied on photocatalytic degradation of Congo Red dye. Results revealed that degradation of Congo red is increased by increasing time and BFO/g-C3N4 dosage and is decreased by increasing Congo Red concentration and pH. The maximum removal percentage of Congo red reached 74.66% at 40 min, pH=2, initial dye concentration of 10 mg/L, photocatalyst dosage of 0.05 g/100mL under 30 w visible light. It can be deduced that BFO/g-C3N4 nanocomposite act as an effective photocatalyst for removing Congo red from aqueous solutions when exposed to visible light.

کلیدواژه‌ها [English]

  • BFO/g-C3N4 nanocomposite
  • Photocatalyst
  • Congo Red dye
  • Photocatalytic removal

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