g-C₃N₄/Ag₃PO₄ composites with synergistic effect for increased photocatalytic activity under the visible light irradiation

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• 作者：Hui Xu^a ; ^{xh@ujs.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Haozhu Zhao^a ; Yanhua Song^a ; Wei Yan^a ; Yuanguo Xu^a ; Hongping Li^a ; Liying Huang^a ; Sheng Yin^a ; Yeping Li^a ; Qi Zhang^b ; Huaming Li^a ; ^{lihm@ujs.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：g-C3N4/Ag3PO4 ; Photocatalytic ; Degradation
• 刊名：Materials Science in Semiconductor Processing
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：39
• 期：Complete
• 页码：726-734
• 全文大小：1168 K

文摘

The g-C₃N₄ was synthesized by a hydrothermal method and the g-C₃N₄/Ag₃PO₄ composites were prepared by a ordinary precipitation method. Microstructures, morphologies and optical properties of the as-prepared samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), UV–vis diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDS). The results showed that the Ag₃PO₄ nanoparticles were dispersed on the surface of the flake-like g-C₃N₄, and the heterojunction was formed on the interface. The g-C₃N₄/Ag₃PO₄ (2 wt%) photocatalyst presented the highest photocatalytic activity for organic dye methylene blue (MB) degradation, and its photocurrent intensity was approximately 2 times than that of the pure Ag₃PO₄. The g-C₃N₄/Ag₃PO₄ (2 wt%) photocatalyst also exhibited photocatalytic performance in the decomposition of colorless antibiotic ciprofloxacin (CIP). The capture experiment confirmed that holes acted as the main active species during the photocatalytic reaction.