دنیای نانو

دنیای نانو

ساخت لایه‌های نازک‌‌ وانادات بیسموت و بررسی خصوصیات ساختاری ، نوری و فوتوکاتالیستی آن‌ها

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، لایه‌های نازک 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 لایه‌های نازک‌ استفاده شد. از داده‌های الگوی پراش پرتوی ایکس مشخص شد که لایه‌های نازک با فاز خالص تک‌میل ساخته شده‌اند. آنالیزهای EDS و FTIR نشان دادند که لایه‌های نازک‌ حاوی هیچ عنصر ناخالصی نمی‌باشند. از بررسی تصویر FESEM معلوم گردید که متوسط اندازۀ طول لایه‌های نازک برابر 42/1 میکرومتر است. با استفاده از آنالیز UV-Vis شکاف نوری 21/2 الکترون ولت حاصل شد که در محدودۀ نور مرئی قرار دارد. بررسی فعالیت فوتوکاتالیستی لایه‌های نازک وانادات بیسموت در تجزیۀ رنگ قرمز کنگو نشان داد که که این نوع نانوساختار وانادات بیسموت با فاز تک‌میل، جهت استفادۀ فوتوکاتالیستی و تجزیۀ مواد آلی به کمک نور خورشید مناسب می‌باشد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Synthesize and investigation of structural, optical and photocatalytic properties of bismuth vanadate thin layers

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, Islamic Azad University of Ramhormoz،, Ramhormoz،, Iran
چکیده English

In this research, hydrothermal method was used to made bismuth vanadate (BiVO4) thin layers.The X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectrometer (FTIR) and visible-ultraviolet absorption spectroscopy (UV-Vis) to study the structure Crystal, morphology, optical and photocatalytic properties of thin laters were used. The XRD pattern confirmed the formation of monoclinic pure phase for thin laters. EDS and FTIR analyzes showed that the thin laters do not contain any impurity elements. From FESEM image analysis, it was found that the average length of thin layers is 1.42 micrometers. Using UV-Vis analysis, an optical gap of 2.21 eV was obtained, which is in the visible light range. Investigating the photocatalytic activity of bismuth vanadate thin laters in the photodegradation of Congo red dye showed that this type of bismuth vanadate nanostructure with a monoclinic phase is a suitable choice for photocatalytic use and decomposition of organic matter with the help of sunlight.

کلیدواژه‌ها English

"Bismuth vanadate"
"thin layers"
"Monoclinic"
"Photocatalytic"
"Congo red"
 
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دوره 20، شماره 74
بهار 1403
صفحه 43-35

  • تاریخ دریافت 14 بهمن 1402
  • تاریخ بازنگری 05 اسفند 1402
  • تاریخ پذیرش 19 اسفند 1402