بررسی رفتار فوتوکاتالیزوری فریت منگنز-روی و تأثیر غلظت آن بر تخریب رنگ متیلن‌بلو در حضور نور مرئی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی معدن و متالورژی، دانشگاه یزد، یزد، ایران

2 دانشکده مهندسی شیمی و پلیمر، دانشگاه یزد، یزد، ایران

3 دانشکده شیمی، دانشگاه یزد، یزد، ایران

چکیده

متیلن‌بلو به‌طور گسترده‌ در صنایع مختلفی همچون نساجی به‌کار می‌رود و این در حالی است که پساب‌های حاصل از این صنایع یکی از منابع مهم آلودگی آب به‌شمار می‌آیند. برای حل این مشکل استفاده از فوتوکاتالیزور‌ها به‌منظور تخریب متیلن‌بلو‌ موجود در پساب‌ها به‌عنوان یک روش پذیرفته‌شده، توجه بسیاری از محققین را به خود جلب نموده است. در این پژوهش نیز از فریت منگنز-روی آلاییده شده با دیسپرسیوم با ترکیب شیمیایی Mn0.8Zn0.2Fe1.95Dy0.05O4 به‌عنوان فوتوکاتالیزور جهت تخریب رنگ متیلن‌بلو استفاده شد. به این منظور در ابتدا نانوذرات با استفاده از روش سل-ژل خود احتراقی تولید شدند و با استفاده از آزمون‌های پراش پرتو ایکس و میکروسکوپ الکترونی روبشی نشر میدانی مورد ارزیابی فازی و ریز‌ساختاری قرار گرفتند. الگوهای پراش پرتو ایکس، تشکیل فریت منگنز-روی را با میانگین اندازه بلورک برابر با 28/38 نانومتر و ساختار اسپینلی به‌خوبی اثبات کرد. همچنین با استفاده از تصاویر میکروسکوپی الکترونی روبشی نشر میدانی، میانگین اندازه نانوذرات در حدود 99/28 نانومتر به‌دست آمد. در مرحله بعد، تأثیر استفاده از مقادیر مختلفی (0، 0/1، 0/2 و 0/3 گرم بر لیتر) از فریت منگنز-روی تولیدشده بر تخریب رنگ متیلن‌بلو مورد بررسی قرار گرفت. نتایج نشان داد که حضور این نانوذرات می‌تواند بر شدت تخریب رنگ متیلن‌بلو تأثیرگذار باشد. در نهایت نتایج بررسی‌های انجام‌شده نشان داد که حضور 0/1 گرم بر لیتر از این نانوذرات، بهترین تأثیرگذاری را به‌دنبال دارد، به‌گونه‌ای‌که در مدت‌زمان 12 ساعت تخریبی در حدود 87/25 درصد حاصل شد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigating the Photocatalytic Behavior of Manganese-Zinc Ferrite and the Effect of Its Concentration on the Degradation of Methylene Blue in the Presence of Visible Light

نویسندگان [English]

  • S. Shahedi 1
  • S. Hasani 1
  • Z. Daneshfar 2
  • A.R. Mashreghi 1
  • Z. Zoghaghi 3
1 Department of Mining and Metallurgical Engineering, Yazd University
2 Department of Chemical and Polymer Engineering, Yazd University, Yazd, Iran
3 Department of Chemistry, Yazd University
چکیده [English]

Methylene blue is widely used in various industries, such as textile. Notably, wastewater generated from these industries represents a significant source of water pollution. To solve this problem, the use of photocatalysts for the degradation of methylene blue in wastewater has attracted the attention of many researchers. In this study, manganese-zinc ferrite nanoparticles doped with dysprosium with the chemical composition of Mn0.8Zn0.2Fe1.95Dy0.05O4 were utilized as photocatalyst for the degradation of methylene blue dye. Initially, the nanoparticles were synthesized using a self-combustion sol-gel method, and their phase composition and microstructural characteristics were evaluated through X-ray diffraction and field emission scanning electron microscopy, respectively. The XRD patterns confirmed the formation of manganese-zinc ferrite nanoparticles with an average crystallite size of 28.38 nm within a spinel structure. Additionally, FE-SEM micrographs indicated an average particle size of approximately 99.28 nm for the nanoparticles. Subsequently, the influence of different values of the synthesized manganese-zinc ferrite nanoparticles (0.0, 0.1, 0.2, and 0.3 g/lit) on the degradation of methylene blue dye was investigated. The results demonstrated that the presence of these nanoparticles significantly affected the degradation rate of methylene blue. Ultimately, the findings indicated that the addition of 0.1 g/lit of these nanoparticles yielded the most effective results, achieving approximately 87.25% degradation in 12 h.

کلیدواژه‌ها [English]

  • Manganese-zinc ferrite nanoparticles
  • Self-combustion sol-gel
  • Photocatalysis
  • Photodegradation
  • Methylene blue

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مواد پیشرفته در مهندسی
دوره 43، شماره 3
مهر 1403
صفحه 35-46

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