Synthesis of high efficient and stable plasmonic photocatalyst Ag/AgNbO3 with specific exposed crystal-facets and intimate heterogeneous interface via combustion route
Applied Surface Science(2019)
Abstract
The efficiency and stability of plasmonic photocatalysts that closely related with microstructure characteristics are intensively studied for practical applications. Here, a plasmonic photocatalyst Ag/AgNbO3 was successfully synthesized by a facile combustion method, and systematically characterized by XRD, XPS, DRS, SEM, TEM and photocurrent techniques. The photocatalytic activity of Ag/AgNbO3 as a function of Ag vs Nb contents are assessed toward Rhodamine B (RhB) and tetracycline (TC) degradation under the visible-light. At an optimal Ag content, the greatest photocatalytic efficiency of as-prepared Ag/AgNbO3 on photodegradation of RhB (0.0447 min−1) was 2 times higher than that of currently reported solvents routes (0.0213 min−1). Meanwhile, the experimental and theoretical studies were conducted to examine the photocatalytic efficiency and stability of the as-prepared photocatalysts, the results show that the photocatalytic efficiency and stability are related with the SPR effect, ferroelectric polarization, specific exposed crystal-facets and interfacial crystallinity. This work may also provide new ideas for the design and preparation of other highly efficient and stable plasmonic photocatalysts.
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Key words
Plasmonic photocatalysts,Ag/AgNbO3,High-surface-energy crystal-facets,Interfacial crystallinity
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