کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1694017 | 1519057 | 2016 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Enhanced visible-light photocatalytic activity of kaolinite/g-C3N4 composite synthesized via mechanochemical treatment Enhanced visible-light photocatalytic activity of kaolinite/g-C3N4 composite synthesized via mechanochemical treatment](/preview/png/1694017.png)
• Kaolinite/g-C3N4 was fabricated through a facile mechanochemical method.
• ·KA/CN-40% sample exhibit the optimal photoactivity.
• The role of kaolinite in the formation of KA/CN composites is discussed.
• The enhanced photocatalytic activities and enhancement mechanism are presented.
A novel kaolinite/g-C3N4 (KA/CN) composite with enhanced visible light-driven photocatalytic activity was prepared through a simple mechanochemical method. The microstructure and interface properties of the obtained nanocomposites were characterized by X-ray diffraction (XRD), surface area measurement (BET), Fourier transform infrared spectroscopy (FTIR), high resolution scanning electron microscope (HR-SEM), energy dispersive X-ray spectroscopy (EDS), UV–visible diffused reflectance spectroscopy (UV–vis DRS) and photoluminescence spectroscopy (PL). It is indicated that g-C3N4 and kaolinite coexisted in the composite photocatalysts. Compared with the single g-C3N4 or kaolinite and kaolinite/g-C3N4 physical mixtures, the as-synthesized KA/CN composites exhibited significantly enhanced photocatalytic activity after mechanochemical treatment under visible-light irradiation, which was almost 4.0 times that of the pure g-C3N4. The enhanced photocatalytic activity of the kaolinite/g-C3N4 composite could be attributed not only to its high adsorption capacity but also to the synergistic effects between g-C3N4 and kaolinite, effectively reducing the recombination probability of photogenerated electron-hole pairs.
Journal: Applied Clay Science - Volume 129, August 2016, Pages 7–14