کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5438863 | 1398188 | 2017 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photocatalysis and luminescence properties of zinc stannate oxides
ترجمه فارسی عنوان
خواص فوتوکاتالیز و لومینسانس اکسید روی استنات
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
In the present study, ZnO/SnO2 nanocomposites and Zn2SnO4 powder phosphors were synthesized via a sol-gel method through the control of annealing process. The coupled oxides ZnO/SnO2 nanopowders formed after annealing at 400-600 °C, and the spinel zinc stannate phase appeared at 700 °C. On annealing in the temperature range of 1000-1200 °C, Zn2SnO4 is the dominant phase with small traces of ZnO and SnO2. The photocatalysis evaluation indicated that the photocatalytic activity of ZnO/SnO2 nanocomposites for the degradation of azo dye Acid Orange 7 (AO7) was much higher than those of pure ZnO and SnO2 under near UV light irradiation. The higher photocatalytic activity is related to the formation of nano-heterostructures, which provided an effective way to suppress the charge recombination and enhanced the degradation efficiency consequently. Under excitation at 327 nm, photoluminescence (PL) spectra revealed the Zn2SnO4 powder phosphors having a weak n-UV emission and a broad visible emission around 400-700 nm with peaking at 548 nm. Chromaticity diagram exhibited the Zn2SnO4 powders having the characteristics of near white light emission. The results show that ZnO/SnO2 nanocomposites and Zn2SnO4 powders have potential applications for the nanophotocatalysts, display, and solid-state lighting devices, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Supplement 1, August 2017, Pages S428-S434
Journal: Ceramics International - Volume 43, Supplement 1, August 2017, Pages S428-S434
نویسندگان
Mu-Tsun Tsai, Yee-Shin Chang, You-Cheng Liu,