کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1515717 | 1511539 | 2014 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Facile post-synthesis and photocatalytic activity of N-doped ZnO–SBA-15 Facile post-synthesis and photocatalytic activity of N-doped ZnO–SBA-15](/preview/png/1515717.png)
• N–ZnO–SBA-15 materials were synthesized.
• The materials exhibit light absorbance in the visible region.
• The photocatalytic degradation of methylene blue was investigated.
N-doped ZnO–SBA-15 materials (denoted as nN–xZnO–SBA-15, where n is number of urea treatments and x is the weight ratio of ZnO/(ZnO+SBA-15)) were successfully synthesized by a two-step procedure. First, xZnO–SBA-15 was prepared by impregnating SBA-15 with Zn(NO3)2, followed by calcinating at 550 °C. In the second step, xZnO–SBA-15 was modified n times by doping nitrogen with the assistance of urea. The resulting nN–xZnO–SBA-15 materials prepared with various numbers of urea treatments were characterized by XRD, TEM, SEM, EDS, N2 adsorption/desorption at 77 K, diffuse reflectance UV–vis, and XPS. The results show that the nN–xZnO–SBA-15 maintains its ordered hexagonal mesostructure and exhibits light absorbance in the visible region. The nN–xZnO–SBA-15 samples were investigated with the photodegradation of methylene blue under visible light, and exhibited significant photocatalytic activity. The kinetics of the reaction obeyed the Langmuir–Hinshelwood model.
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Journal: Journal of Physics and Chemistry of Solids - Volume 75, Issue 3, March 2014, Pages 403–409