本篇論文研究了在 FTO 基板上以水熱和光還原法製備 p-BiFeO3 (BFO)/n-ZnSnO3 (ZTO)/Ag 複合薄膜及其對 RhB 溶液的壓電光降解應用。為了研究形貌的影響，製備了各種形貌的 ZTO 薄膜 [納米顆粒 (NP)、短納米柱 (s-NR) 和長納米柱 (l-NR)]，並與 BFO 微孔板耦合以形成各種異質結薄膜（即ZTONP/BFO 微孔板、ZTOs-NR/BFO 微孔板和 ZTOl-NR/BFO 微孔板）。使用了各種量測來測定單一材料和復合材料的性質，包括相、形態、結晶度、導電性型、價態、能隙、功函數、壓電性以及壓電和壓電光電效應。雖然 p-BFO/n-ZTOl-NR 的壓電光降解效率良好（k = 7.4 × 10-3 min-1），但仍略低於 BFO（k = 7.9 × 10-3 min） -1)。然而，當 Ag 納米顆粒 (0.01 M) 進一步與 p-BFO/n-ZTOl-NR 偶合時，壓電光降解顯著增強 (k = 9.5 × 10-3 min-1)，並構建能帶圖以闡述其機制。由於 Ag 納米粒子的表面等離子共振產生了大量的熱電子，這些熱電子注入到 n-ZTO 的導帶 (CB) 中，使的電荷載流子的復合減少，壓電光降解效率的顯著提高。此外，光降解的循環研究和XRD結構分析證明 p-BFO/n-ZTO/Ag 具有穩定性和可重複使用性。

This study reports the hydrothermal and photoreduction fabrication of p-BiFeO3 (BFO)/n-ZnSnO3 (ZTO)/Ag composite films on FTO substrates and their application in piezo-photodegradation of RhB solutions. To study the morphology effect, various shape ZTO films [nano particle (NP), short nanorod (s-NR), and long nanorod (l-NR)] were fabricated and coupled with the BFO microplates to form various heterojunction films (i.e., ZTONP/BFO microplate, ZTOs-NR/BFO microplate, and ZTOl-NR/BFO microplate). Various characterizations were used to determine the properties of the individual components and composites, including phases, morphology, crystallinity, conductivity types, valence states, band gaps, work functions, piezoelectricity, and piezotronic and piezophototronic effect. Although the piezo-photodegradation of the p-BFO/n-ZTOl-NR was promising (k = 7.4 × 10-3 min-1), the performance was slightly worse than that of the BFO (k = 7.9 × 10-3 min-1). However, when Ag nanoparticles (0.01 M) were further coupled with the p-BFO/n-ZTOl-NR, the piezo-photodegradation were substantially enhanced (k  9.5 × 10-3 min-1). An energy band diagram was constructed to elucidate the performance. Because of surface plasmon resonance of the Ag nanoparticles induced substantial amounts of hot electrons, which injected to the conduction band (CB) of the n-ZTO, leading to the reduction in the charge carrier recombination and dramatic increase in piezo-photodegradation efficiency. Furthermore, a cycling study and a structure analysis indicated the satisfactory stability and reusability of the p-BFO/n-ZTO/Ag.

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