دنیای نانو

دنیای نانو

ساخت و بررسی خصوصیات بلوری، نوری و فوتوکاتالیستی نانوالیاف وانادات بیسموت

نوع مقاله : مقاله پژوهشی

نویسندگان
1 گروه فیزیک، دانشکده علوم پایه، دانشگاه آزاد اسلامی اهواز، اهواز، ایران
2 گروه فیزیک، دانشکده علوم پایه، دانشگاه آزاد اسلامی رامهرمز، رامهرمز ، ایران
چکیده
در این پژوهش، نانوالیاف وانادات بیسموت (BiVO4) به ‌روش حرارتی ساخته شدند. از آنالیزهای پراش پرتوی ایکس (XRD)، میکروسکوپ الکترونی روبشی گسیل میدانی ( FESEM)، طیف نگاری پراکندگی انرژی (EDS )، طیف سنج تبدیل فوریه مادون قرمز (FTIR ) و طیف سنجی جذبی مرئی- فرابنفش (UV-Vis ) برای مطالعۀ ساختار بلوری، ریخت شناسی، خواص نوری و فوتوکاتالیستی نانوالیاف‌ استفاده شد. از الگوی پراش پرتوی ایکس مشخص شد که نانوالیاف با فاز خالص تک‌میل ساخته شده‌اند. نتایج آنالیزهای FTIR وEDS نشان دادند که در نانوالیاف‌ عنصر ناخالصی وجود ندارد. از بررسی تصویر FESEM معلوم گردید که متوسط اندازۀ طول نانوالیاف برابر 208/0 میکرومتر است. با استفاده از آنالیز UV-Vis شکاف نوری 19/2 الکترون ولت حاصل شد که در محدودۀ نور مرئی قرار دارد. بررسی فعالیت فوتوکاتالیستی نانوالیاف وانادات بیسموت در تجزیۀ رنگ قرمز کنگو نشان داد که که این نوع نانوساختار وانادات بیسموت با فاز خالص تک‌میل، جهت استفادۀ فوتوکاتالیستی و تجزیۀ مواد آلی به کمک نور خورشید مناسب می‌باشد.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Synthesize and investigation of crystalline, optical and photocatalytic properties of bismuth vanadate nanofibers

نویسندگان English

Nasrin Ghazkoob 1
Masoumeh Naderi 2
1 Department of Physics, Faculty of Basic Sciences, Ahvaz Islamic Azad University, Ahvaz, Iran
2 Department of Physics, Faculty of Basic Sciences.Ramhormez Islamic Azad University, Ramhormez, Iran
چکیده English

In this study, bismuth vanadate (BiVO4) nanofibers were synthesized by hydrothermal method. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), Fourier transform infrared (FTIR) and ultraviolet-visible absorption spectroscopy (UV-Vis) were used to study the crystal structure, morphology, optical and photocatalytic properties of the nanofibers. The XRD pattern revealed that the nanofibers were made with a pure monoclinic structure. The results of FTIR and EDS analyses showed that there were no impurity elements in the nanofibers. The FESEM image analysis revealed that the average length of the nanofibers was 0.208 μm. Using UV-Vis analysis, an optical gap of 2.19 eV was obtained, which is in the visible light range. The investigation of the photocatalytic activity of bismuth vanadate nanofibers in the photodegradation of Congo red dye showed that this type of bismuth vanadate nanostructure with a pure monoclinic structure is suitable for photocatalytic use and decomposition of organic materials with the help of sunlight.

کلیدواژه‌ها English

"Bismuth vanadate"
"Nanofibers"
"Monoclinic"
"Photocatalytic"
"Congo red"
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دوره 21، شماره 80
پاییز 1404
صفحه 80-90

  • تاریخ دریافت 10 تیر 1404
  • تاریخ بازنگری 28 شهریور 1404
  • تاریخ پذیرش 08 مهر 1404