Jin Chao, Liu Guanglei, Zu Lianhai, Qin Yao, Yang Jinhu
Department of Chemistry, Tongji University, Siping Road 1239, Shanghai 200092, People's Republic of China.
Research Center for Translational Medicine, East Hospital, Tongji University School of Medicine, Tongji University, No. 150 Jimo Road, Shanghai 200120, People's Republic of China; Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, No. 150 Jimo Road, Shanghai 200120, People's Republic of China.
J Colloid Interface Sci. 2015 Sep 1;453:36-41. doi: 10.1016/j.jcis.2015.03.066. Epub 2015 Apr 30.
In this article, we report a novel Ag@Ag3PO4@ZnO ternary heterostructures synthesized through a three-step approach. Firstly, single-crystalline Ag nanorods are fabricated and served as the templates for subsequent Ag3PO4 deposition. Secondly, Ag3PO4 crystals are grown around Ag core nanorods through a solution co-precipitation process, leading to the Ag@Ag3PO4 binary heterostructures. Finally, ZnO nanorod arrays on the surface of the Ag@Ag3PO4 heterostructures are realized via a seeded growth strategy, forming the typical Ag@Ag3PO4@ZnO ternary heterostructures. The photodegradation of rhodamine B under ultraviolet-visible light irradiation indicates that the Ag@Ag3PO4@ZnO ternary heterostructures exhibit much higher activities than pure Ag3PO4 and binary heterostructures of Ag@Ag3PO4. The higher photocatalytic activity of the Ag@Ag3PO4@ZnO composites may be attributed to the effective photogenerated charge separation at heterointerfaces of Ag/Ag3PO4 and Ag3PO4/ZnO, and the rapid electron transport along one-dimensional Ag and ZnO nanorods.
在本文中，我们报道了一种通过三步法合成的新型Ag@Ag3PO4@ZnO三元异质结构。首先，制备单晶Ag纳米棒并将其用作后续Ag3PO4沉积的模板。其次，通过溶液共沉淀法在Ag核纳米棒周围生长Ag3PO4晶体，从而得到Ag@Ag3PO4二元异质结构。最后，通过种子生长策略在Ag@Ag3PO4异质结构表面实现ZnO纳米棒阵列，形成典型的Ag@Ag3PO4@ZnO三元异质结构。罗丹明B在紫外-可见光照射下的光降解表明，Ag@Ag3PO4@ZnO三元异质结构比纯Ag3PO4和Ag@Ag3PO4二元异质结构表现出更高的活性。Ag@Ag3PO4@ZnO复合材料较高的光催化活性可能归因于Ag/Ag3PO4和Ag3PO4/ZnO异质界面处有效的光生电荷分离，以及沿一维Ag和ZnO纳米棒的快速电子传输。
