کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4984299 | 1454486 | 2018 | 10 صفحه PDF | دانلود رایگان |
Two hierarchical ZnO micro/nano-materials have been prepared by a short-time (45Â min) hydrothermal reaction without any surfactants. The different morphologies have been characterized comprehensively by XRD, SEM, TEM and XPS technologies. The hierarchical micro- and nano-structures are respectively consisted by the subordinate nano-pieces and nano-hexagonal-rods. Under the illumination of the simulated solar light, the nano-piece-aggregate spends 40Â min to degrade the 98% of rhodamine 6G solution (10â5Â mol/L), whereas the nano-rod-aggregate only degrades the 78% of the solution in the same condition. Moreover, the photocatalytic performances of the two ZnO aggregates are significantly improved by loading with Au nanoparticles (NPs) in the same assembly process. The nano-piece-aggregate decorated with the Au NPs spends 24Â min to decompose the rhodamine 6G solution completely, while nano-rod-aggregate decorated with the Au NPs needs 28Â min. The related photocatalytic mechanisms are proposed in this paper.
Au nanoparticles decorate the hierarchical ZnO structure to construct a hybrid photocatalyst with enhanced performance.106
Journal: Journal of Colloid and Interface Science - Volume 509, 1 January 2018, Pages 58-67