کاربرد Fe3O4@BNPs@ZnS-CdS به‌عنوان فوتوکاتالیست کارآمد در ناحیه مرئی برای حذف رنگ‌های آلی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 محقق پسا دکترا، گروه شیمی آلی، دانشکده شیمی، دانشگاه رازی، کرمانشاه، ایران

2 استاد، مرکز تحقیقات علوم و فناوری نانو (NNRC)، دانشکده شیمی، دانشگاه رازی، کرمانشاه، ایران

چکیده

امروزه مقدار زیادی فاضلاب حاوی رنگ و مواد سمّی توسط صنایعی مانند نساجی، چاپ، رنگرزی، ریسندگی و چرم‌سازی وارد محیط‌زیست می‌شود، بنابراین آلودگی آب یکی از جدی‌ترین مشکلات محیط‌زیستی است که کیفیت و سلامت آب را تحت تأثیر قرار می‌دهد. به‌همین دلیل، حذف رنگ‌ها و مواد سمّی از آب یکی از دغدغه‌های پژوهشگران است. در این راستا در این پژوهش، نانوکامپوزیت بوهمیت مغناطیسی اصلاح شده با سولفید روی- سولفید کادمیوم (Fe3O4@BNPs@ZnS-CdS (ZnS/CdS: 0.25:0.75 به‌عنوان یک فوتوکاتالیست کارآمد برای حذف رنگ‌های DR16 و RhB در ناحیه مرئی، استفاده شد. این فوتوکاتالیست قادر به حذف رنگ‌‌های آنیونی و کاتیونی بود. خواص فوتوکاتالیست سنتز شده با استفاده از XRD (ساختار فوتوکاتالیست تأیید و حضور سولفید روی و سولفید کادمیم روی سطح فوتوکاتالیست)، FTIR (تأیید حضور گروه‌های عاملی مختلف روی سطح فوتوکاتالیست)، BET (به‌دست آمدن مقدار سطح ویژه فوتوکاتالیست و تأیید ساختار مزوپور فوتوکاتالیست)، FESEM (نشان دادن ساختار نسبی فوتوکاتالیست و تخمین اندازه ذرات)، VSM (تعیین قدرت مغناطیسی فوتوکاتالیست)، TGA (تعیین میزان پایداری حرارتی فوتوکاتالیست)، DRS ، پتانسیل زتا (تعیین بار سطحی فوتوکاتالیست در pHهای مختلف) و EDX (تأیید سنتز و حضور عناصر اصلی موجود در ساختار فوتوکاتالیست) بررسی شد. نتایج نشان داد که رنگ DR16 در pH خنثی با کارایی 95 درصد در مدت 12 دقیقه از بین رفت. در مورد RhB بهترین نتیجه یعنی حذف 97 درصد در pH معادل 3 به‌دست آمد. همچنین، میزان TOC بعد از تخریب رنگ به‌طور چشمگیری کاهش یافت. تخریب رنگ برای DR16 و RhB از سینتیک مرتبه اول پیروی می‌کند. از مزایای این فوتوکاتالیست می‌توان به جدا شدن راحت از محیط، زیست‌سازگاری، فعالیت عالی در نور مرئی، قابلیت بازیافت و سهولت سنتز اشاره کرد. منبع نور استفاده شده در این پژوهش لامپ جیوه‌ای پرفشار بود که ارزان و بادوام است و عملکرد عالی دارد.

کلیدواژه‌ها

عنوان مقاله [English]

Application of Fe3O4@BNPs@ZnS-CdS as an Efficient Photocatalyst in the Visible Region for the Removal of Organic Dyes

نویسندگان [English]

  • Minoo Khodamorady 1
  • Kiumars Bahrami 2
1 Postdoctoral Researcher, Dept. of Organic Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran
2 Prof., Nanoscience and Nanotechnology Research Center (NNRC), Faculty of Chemistry, Razi University, Kermanshah, Iran
چکیده [English]

Today, large amounts of wastewater containing dyes and toxic substances enter the environment through industries such as textile, printing, dyeing, spinning, and leather making; therefore, water pollution is one of the most serious environmental problems that affects the quality and health of water. For this reason, removing dyes and toxic substances from water is one of the researchers concerns. In this regard, in this study, magnetic boehmite nanocomposite modified with zinc sulfide-cadmium sulfide (Fe3O4@BNPs@ZnS-CdS (ZnS/CdS: 0.25:0.75)) was used as an efficient photocatalyst to remove direct red 16 and rhodamine B dyes in the visible region. This photocatalyst is able to remove anionic and cationic dyes. The properties of the synthesized photocatalyst were investigated using XRD, FTIR, BET, FESEM, VSM, TGA, DRS, zeta potential and EDX. The results showed that the direct red 16 dye was destroyed in a neutral pH with an efficiency of 95%, within 12 min. Regarding rhodamine B, the best result, 97% removal, was obtained at pH=3. Also, the amount of TOC decreased dramatically after dye degradation. Dye degradation for both DR16 and RhB follows first-order kinetics. The advantages of this photocatalyst include ease of separation from the environment, biocompatibility and excellent activity in visible light, recyclability, and ease of synthesis. The light source used in this research is high-pressure mercury lamp, which is cheap and durable and has excellent performance.

کلیدواژه‌ها [English]

  • Photocatalyst
  • Magnetic Boehmite
  • Dye Removal
  • ZnS-CdS
  • High Pressure Mercury Lamp

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مجله آب و فاضلاب
دوره 34، شماره 4 - شماره پیاپی 147
مهر و آبان 1402
صفحه 22-43

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