采用晶种异质外延生长法合成制备结构新颖、性能稳定的类仙人球状的 Ag3 PO4立方微晶(MC)/ZnO纳米棒阵列(NRs)异质结.利用扫描电子显微镜(SEM)、高分辨透射电子显微镜(HRTEM)表征样品形貌,X射线衍射仪(XRD)表征晶体结构.通过有机染料罗丹明 B(RhB)的降解率及循环降解能力测试,研究其催化活性及稳定性.实验结果表明,制备的 Ag3 PO4 MC/ZnO NRs 异质结表现出良好的光催化活性及稳定性；在可见光区域催化降解RhB的实验中,降解率高达98％.Ag3 PO4 MC/ZnO NRs异质结独特的复合结构为催化反应提供大量的催化活性位点,有效提高催化反应的活性,同时降低了光生电子-空穴电荷对的复合率,从而极大地增强了光催化效率.
Heterostructure of Ag3 PO4 microcube (MC)/ZnO nanorobs(NRs)were fabricated via a heteroepitaxi-al growth strategy.As-prepared Ag3 PO4 MC/ZnO NRs was cactus-like.Scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM)was used to characterize the morphology of the samples,the X-ray diffraction (XRD)was used to characterize the crystal structure,and the photocatalytic properties and stability were studied with degradation of Rhodamine B (RhB)under visible light irradiation.The experimental results showed that Ag3 PO4 MC/ZnO NR heterostructures exhibited superior photocatalytic activ-ity toward degradation of RhB under visible light irradiation.The degradation rate was about 98%.The en-hanced catalytic performance was owned to the hetero-structured catalyst which supplied more active sites, meanwhile improved the efficient separation of photo-excited electron-hole pairs.
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