کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5461104 | 1516184 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of chemical composition on the photoluminescent and photocatalytic properties of novel molten salt synthesized Sr1-xCaxBi2Ta2O9:Eu3+ nanosheets
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The bismuth layered-structure Sr1-xCaxBi2Ta2O9 (SCBT) and Eu3+ doped Sr1-xCaxBi2Ta2O9 solid solutions (0 â¤Â x â¤Â 1) have been synthesized by molten salt synthesis (MSS). X-Ray diffraction (XRD) characterizations showed that an unlimited solid solution with orthorhombic structure was formed in the x range from 0 to 1.0. Scanning electron microscopy (SEM) showed that the prepared samples presented regular nanosheets with a thickness of 100 nm. The structure evolutions of the solid solution were investigated by Fourier transform infrared spectra (FT-IR), UV-Vis spectrum and transmission electron microscopy (TEM) images. X-ray photoelectron spectroscopy (XPS) result showed that only Eu3+ was present in the Eu-doped SCBT solutions. Influences of the chemical composition on the photoluminescent and photocatalytic performance have been performed and discussed: In the composition range x = 0 to 0.6, intensities of emission exhibited increased values and x = 0.6 shows the best photoluminescent performance under both 397 and 464 nm excitation at room temperature. All the as-prepared nanosheets showed a long lifetime in the range from 1.30 to 1.60 ms, depending on chemical composition. The photocatalytic activity for the degradation of methylene blue (MB) under UV-light was also varied with the chemical composition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 710, 5 July 2017, Pages 234-243
Journal: Journal of Alloys and Compounds - Volume 710, 5 July 2017, Pages 234-243
نویسندگان
Yunjian Wang, Feiyang Zhan, Jing Cao, Mingzhu Liu,