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T，Zhang L，et al． Morphological transition of gold nanostructures induced by continuous ultraviolet irradiation． Nanotechnology，2006，17(22): 5639 ［32］ Liu Z Y，Bai H W，Xu S P，et al． Hierarchical CuO/ZnO “corn-like”architecture for photocatalytic hydrogen generation． Int J Hydrogen Energy，2011，36(21): 13473 ·745·