g-C3N4/BiPO4光催化剂合成及光催化性能研究

Study of Preparation and Photocatalytic Activity of g-C3N4/BiPO4

摘要:

本文以Bi(NO₃) ₃.5H₂O和Na₃PO₄.12 H₂O为原料通过水热法合成了BiPO₄,用g-C₃N₄分子对其表面修饰,利用超声杂化提高磷酸铋的光催化效率和稳定性。采用X射线衍射仪、红外光谱仪、扫描电镜、透射电镜和比表面积及孔隙度分析仪等对其进行了表征,并在光催化反应装置中模拟可见光条件,对合成的g-C₃N₄/BiPO₄光催化剂以亚甲基蓝为目标降解物时的催化活性进行了系统的研究。实验结果表明：在掺杂g-C₃N₄之后,可见光条件下BiPO₄的光催化活性得到较大程度提升。当g-C₃N₄掺杂量为BiPO₄的7%时,该复合光催化剂在可见光下的光催化活性最高。

Abstract:

BiPO₄ was synthesized with Bi(NO₃) ₃.5H₂O, Na₃PO₄.12 H₂O hybridized by g-C₃N₄, and the g-C₃N₄/BiPO₄ presents enhanced performance in the paper. The g-C₃N₄/BiPO₄ photocatalysts were characterized by XRD, FT-IR, SEM, TEM and BET. The photocatalytic activities were evaluated by the degradation of methylene blue under the visible light in the photocatalytic reaction device. TheSexperimentalSresults show that the visible light photocatalytic activity of BiPO₄ was greatly enhanced by the hybridization of g-C₃N₄. A loading amount of 7% g-C₃N₄ over BiPO₄ led to the most obvious increase of the photocatalytic activity under the visible light irradiation. Keywords: Composite photocatalysts; BiPO₄; g-C₃N₄; visible light