کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7117622 | 1461365 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photocatalytic, Fenton and photo-Fenton degradation of RhB over Z-scheme g-C3N4/LaFeO3 heterojunction photocatalysts
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Z-scheme g-C3N4/LaFeO3 heterojunction photocatalysts were prepared by calcining the uniformly mixed g-C3N4 nanosheets and LaFeO3 nanoparticles at 300â¯Â°C for 1â¯h. The as-prepared g-C3N4/LaFeO3 composites were systematically characterized by XRD, SEM, TEM, XPS, UV-vis DRS, PL spectroscopy, EIS and photocurrent response. It is demonstrated that LaFeO3 nanoparticles (average size: ca. 35â¯nm) are uniformly assembled onto the surface of g-C3N4 nanosheets through chemical bonding, leading to the formation of g-C3N4/LaFeO3 heterojunctions. The photocatalytic, Fenton and photo-Fenton performances of the samples were investigated by degrading RhB using simulated sunlight as the light source. Compared to bare LaFeO3 and g-C3N4, the g-C3N4/LaFeO3 composites exhibit significantly enhanced photocatalytic and photo-Fenton degradation of the dye, and the maximum activity is observed for the 15%g-C3N4/LaFeO3 composite. Moreover, the photo-Fenton performance of the composites is much higher than the photocatalytic or Fenton performances. The much improved photo-fenton activity is ascribed to the efficient separation of photogenerated electron-hole pairs due to the Z-scheme electron transfer and the synergistic effect between LaFeO3 and g-C3N4.
- OH radicals were examined by PL spectroscopy using TPA as a probe molecule, clearly revealing the
- OH generation, and moreover, the
- OH yield and the dye degradation rate show a similar variation between different cases of the catalysis process. This suggested that
- OH is the dominant reactive species causing the dye degradation. The underlying photo-Fenton mechanism of the composites is discussed.
- OH radicals were examined by PL spectroscopy using TPA as a probe molecule, clearly revealing the
- OH generation, and moreover, the
- OH yield and the dye degradation rate show a similar variation between different cases of the catalysis process. This suggested that
- OH is the dominant reactive species causing the dye degradation. The underlying photo-Fenton mechanism of the composites is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science in Semiconductor Processing - Volume 82, 1 August 2018, Pages 14-24
Journal: Materials Science in Semiconductor Processing - Volume 82, 1 August 2018, Pages 14-24
نویسندگان
Yongchun Ye, Hua Yang, Xiangxian Wang, Wangjun Feng,