سنتز، مشخصه‌یابی و فعالیت فوتوکاتالیزوری نانوکامپوزیت ZnS/MoS2 پوشش داده شده با نانوذرات Fe3O4

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه ولی عصر عج رفسنجان

چکیده

در این پژوهش، نانوکامپوزیت  ZnS/MoS2به روش گرمابی و نانوکامپوزیت  ZnS/MoS2/Fe3O4 به روش هم­رسوبی سنتز شدند. نخست نانوذرات ZnS سنتز شده و سپس با نانوساختار MoS2 بارگذاری شدند. در ادامه،  ZnS/MoS2 به دست آمده با نانوذرات مگنتایت Fe3O4 پوشش داده شدند و فرآورده پایانی به صورت نانوکامپوزیت ZnS/MoS2/Fe3O4 تهیه گردید. برای شناسایی و مشخصه­یابی نمونه­ها از آنالیزهای پراش سنج پرتوی ایکس (XRD)، طیف­سنج­های تبدیل فوریه فروسرخ (FTIR) و رامان، میکروسکوپ الکترونی تراگسیلی (TEM)، آزمون جذب و واجذب نیتروژن (BET) استفاده شد. با استفاده از طیف­سنجی نورتابی (PL) ویژگی­های نورتابی هر دو نانوکامپوزیت بررسی گردید. طیف تبدیل فوریه فروسرخ به خوبی تشکیل پیوندهای Zn-S،  Fe-Oو Mo-S را نشان داد. الگوی پراش پرتو ایکس حضور ساختار مکعبی ZnS و  Fe3O4و ساختار شش­گوشی MoS2 را به خوبی تأیید کرد. تصاویر میکروسکوپ الکترونی به خوبی تشکیل نانوساختار­ها را نشان دادند. در طیف PL، شدت قله­ی نورتابی کاهش یافته نانوکامپوزیت  ZnS/MoS2/Fe3O4می­تواند ناشی از کاهش بازده بازترکیب الکترون-حفره نمونه­ی سه­تایی در مقایسه با نمونه­ی دوتایی باشد. فعالیت فوتوکاتالیزوری ZnS/MoS2/Fe3O4 بر تخریب رنگ متیل نارنجی (MO) و اسید براون(AB)   با استفاده از تابش نور فرابنفش بررسی شد. نمونه­ فعالیت فوتوکاتالیزوری خوبی از خود نشان داد و هم­چنین به دلیل ویژگی مغناطیسی به راحتی قابل بازیافت است که می­تواند به عنوان فوتوکاتالیزور در واکنش­های دیگر به کار رود.    

کلیدواژه‌ها

عنوان مقاله [English]

Preparation, characterization, and photocatalytic activity of ZnS/MoS2 nanocomposite supported by Fe3O4 nanoparticles

نویسندگان [English]

  • Khorasanipoor
  • Iranmanesh
  • Saeednia
Vali-e-Asr University of Rafsanjan
چکیده [English]

In this study, ZnS/MoS2 nanocomposites were synthesized by hydrothermal and ZnS/MoS2/Fe3O4 nanocomposite by chemical co-precipitation methods. ZnS nanoparticles were synthesized initially and then loaded with MoS2 nanostructure. After that ZnS/MoS2 product was mixed by Fe3O4 nanoparticles and the final product that obtained, was ZnS/MoS2/Fe3O4 nanocomposite. XRD, FTIR, TEM, BET and Raman Analyses were used to identify and characterize the samples. Photoluminescence spectroscopy was employed to investigate the optical properties of both composites. The infrared Fourier transform spectra showed a well developed Zn-S, Fe-O and Mo-S bonds. X-ray diffraction pattern confirmed the presence of cubic structure for ZnS and Fe3O4 and hexagonal structure for MoS2. Electron microscopy images well confirmed the formation of nanostructures. Based on PL spectroscopy, the intensity of the luminescence peak decreased, which could be due to a decreases in the electron-holes recombination percentage of the triplet sample compared to the binary sample. Photocatalytic activity of ZnS/MoS2/Fe3O4 on degradation of methyl orange (MO) and acid brown (AB) dye degradation was investigated using UV radiation. The sample showed good photocatalytic activity and can be easily recycled due to its magnetic properties, which can be used as photocatalyst in other reactions.

کلیدواژه‌ها [English]

  • co-precipitation
  • hydrothermal
  • nanocomposite
  • photocatalytic activity
  • ZnS/MoS2/Fe3O4

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مجله بلورشناسی و کانی شناسی ایران
دوره 31، شماره 1 - شماره پیاپی 89
فروردین 1402
صفحه 183-194

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  • تاریخ دریافت: 19 مرداد 1401
  • تاریخ بازنگری: 27 شهریور 1401
  • تاریخ پذیرش: 20 مهر 1401

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