کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
45139 | 46401 | 2016 | 11 صفحه PDF | دانلود رایگان |
• Novel SnNb2O6/g-C3N 2D/2D nanosheet heterostructures were synthesized.
• SnNb2O6/g-C3N4 heterostructures have strong interfacial interaction.
• The heterostructures showed enhanced visible-light photocatalytic activity.
• The enhanced activity was mainly due to improved interfacial charge transfer.
• The hole and superoxide radicals are the two main photoactive species.
In this study, novel SnNb2O6/g-C3N 2D/2D nanosheet heterostructures with strong interfacial interaction were successfully constructed by a facile two-step wet chemistry method. The SnNb2O6/g-C3N4 2D/2D heterostructures exhibit distinctly enhanced visible light photocatalytic performance toward the degradation of methylene blue (MB) as compared to pristine g-C3N4 and SnNb2O6, which can be attributed to the synergistic effect of 2D/2D heterostructures with strong interfacial interaction and abundant 2D coupling interfaces, facilitating efficient charge separation. The optimum photocatalytic activity of 30% SnNb2O6/g-C3N4 heterostructure for the degradation of MB was about 3.9 and 3.2 times higher than those of g-C3N4 and SnNb2O6. It was demonstrated that the photogenerated holes and superoxide radicals are the two main photoactive species toward photocatalytic degradation of MB over the SNO/CN heterostructures. This work may provide some inspiration for the fabrication of 2D/2D nanosheet heterostructures with efficient photocatalytic performance.
Figure optionsDownload as PowerPoint slide
Journal: Applied Catalysis B: Environmental - Volume 183, April 2016, Pages 113–123