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采用水热法制备Ag3PO4晶体,通过调节氨水的浓度,实现了对产物形貌的微结构调控。用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)等手段对样品的晶体结构、形貌和元素组成进行了表征。UV-Vis图证实了制备的Ag3PO4样品在可见光范围内有明显吸收。光催化降解实验结果表明,可见光条件下,商用TiO2光催化效果微乎其微,Ag3PO4却是一种高效的可见光响应催化剂。经微结构调控的Ag3PO4纳米棒具有更多的光催化活性点和有利于载流子传输和分离的结构,其光催化效率大幅提升,是Ag3PO4微米颗粒光催化效率的1.6倍。
The crystal of Ag3PO4 was prepared by hydrothermal method. The microstructure of the product was controlled by adjusting the ammonia concentration. The crystal structure, morphology and elemental composition of the samples were characterized by XRD, SEM and XPS. UV-Vis images confirmed the preparation of Ag3PO4 samples in the visible range of significant absorption. The experimental results of photocatalytic degradation show that the photocatalytic activity of commercial TiO2 is negligible under visible light conditions, but Ag3PO4 is an efficient visible light response catalyst. The microstructure-controlled Ag3PO4 nanorods have more photocatalytic activity points and conducive to carrier transport and separation of the structure, the photocatalytic efficiency increased significantly, is Ag3PO4 microparticles 1.6 times the photocatalytic efficiency.