以片状g-C3N4为载体,采用离子交换法制备出具有可见光催化活性的多面体Ag3PO4,通过化学沉积法制备出不同质量比的g-C3N4/Ag3PO4复合光催化剂。利用X射线衍射仪(XRD)、扫描电镜(SEM)、傅里叶变换红外光谱(FT-IR)和紫外-可见光谱仪(UV-Vis)等方法对催化剂材料进行表征,在可见光的照射下,光催化降解染料罗丹明B和亚甲基蓝,评价催化剂的光催化性能。结果表明,g-C3N4/Ag3PO4复合材料的催化性能远强于纯的g-C3N4和Ag3PO4,且质量比为1∶3时催化降解效率最佳;催化剂重复使用3次后,对罗丹明B和亚甲基蓝的降解率仍可达80%以上,证明g-C3N4/Ag3PO4是一种可重复利用和催化性能良好,且环境友好的光催化材料。
The polyhedron Ag3PO4 with visible-light photocatalytic activity was prepared by ion exchange method using flaky g-C3N4 as the carrier,then composite photocatalysts of g-C3N4/Ag3PO4 with different mass ratios were prepared by chemical deposition method.The synthesized photocatalysts were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),fourier transform infrared spectroscopy (FT-IR) and UV-Vis.Under visible light,rhodamine B and methylene blue were degraded by photocatalysis to evaluate the photocatalytic performance of the catalyst.The results showed that:the catalytic performance of g-C3N4/Ag3PO4 composites were much better than that of pure Ag3PO4 and g-C3N4,and the catalytic degradation efficiency was the highest when the mass ratio was 1∶3.The degradation rate of rhodamine B and methylene blue was still over 80% after the catalyst was reused for three times,proved that g-C3N4/Ag3PO4 was an environmentally friendly photocatalytic material with good reusability and catalytic performance.
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