Facile and green synthesis of novel porous g-C₃N₄/Ag₃PO₄ composite with enhanced visible light photocatalysis

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• 作者：Jinfeng Zhang^a ; Jiali Lv^a ; Kai Dai^a ; ^{daikai940@chnu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Qi Liu^b ; ^{liuqi@ime.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Changhao Liang^a ; ^c ; Guangping Zhu^a
• 关键词：Chemical preparation ; Composites ; Catalysis ; Photocatalytic activity
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：1522-1529
• 全文大小：2442 K

文摘

In this paper, novel Z-scheme porous graphitic C₃N₄ (Pg-C₃N₄)/Ag₃PO₄ composite was synthesized by a facile and green method at room temperature. Scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectrometer (EDS) and UV–vis diffuse reflectance spectroscopy (DRS) were used to characterize the structural, crystal and optical properties of the as-prepared nanocomposites. Photocatalytic activity of catalysts is evaluated by degrading methylene blue (MB) under visible light irradiation. The results showed that photocatalytic activity of Pg-C₃N₄/Ag₃PO₄ was much higher than that of Pg-C₃N₄ and Ag₃PO₄. The kinetic constant K_app of MB degradation over Pg-C₃N₄/Ag₃PO₄ was 1.45 and 9.6 times as high as that of Ag₃PO₄ and Pg-C₃N₄, respectively. Finally, Z-scheme photocatalytic mechanism is proposed.