Abstract
To improve organic pollutant degradation ability, this work aims at designing a novel porous Cu-Ag bimetal hybrid with unique architecture, fertile porosity as well as Schottky junction. Herein, a free-standing hybrid with Ag nanoparticles modified CuxO (x = 1, 2) nanowires in-situ grown on the nanoporous Cu-Ag bimetal network (Ag/CuxO@NP-CuAg) was successfully synthesized by dealloying and then anodizing process. Compared with monometallic CuxO nanowires integrated with nanoporous Cu substrate (CuxO@NPC), the Ag/CuxO@NP-CuAg hybrids with the Ag/CuxO Schottky junction and SPR effect of Ag nanoparticles, are favorable to accelerate the transportation of photo-generated carriers and avoid the recombination of electrons (e-) and holes (h+), thus exhibiting the enhanced photocatalytic performance for RhB. Such remarkable performance is also contributed to the multimodal hierarchical porous structure and the integration design strategy. Moreover, by density functional theory (DFT) calculation, a typical Z-scheme mechanism is proposed to better understand the photocatalytic degradation process. The formation mechanism of the Ag/CuxO nanowires is also investigated.
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