Remarkably enhanced photocatalytic performance of Au/AgNbO3 heterostructures by coupling piezotronic with plasmonic effects

Harvesting mechanical energy for hydrogen generation by piezoelectric metal–organic frameworks

“…5,6 The currently developed piezocatalysts are mainly confined to inorganic semiconductor materials such as metal oxides ( e.g. , BaTiO 3 , 7 BiFeO 3 , 8 Bi 0.5 Na 0.5 TiO 3 9 and AgNbO 3 10 ), nitrides ( e.g. , C 3 N 4 11 and GaN 12 ), and transition metal dichalcogenides (TMDs).…”

Thin Films (FTO/BaTiO3/AgNPs) for Enhanced Piezo-Photocatalytic Degradation of Methylene Blue and Ciprofloxacin in Wastewater

“…Therefore, the conduction band and valence band potentials were calculated to be −0.82 eV (vs NHE) and +2.08 eV (vs NHE). Furthermore, when BTO/AgNPs is exposed under ultrasonic vibration, BTO generates a piezoelectric field across CB and VB with positive piezo-potential and negative potential ( V + and V –, labeled by the red arrows in Scheme b), driving photogenerated electrons and holes on opposite sides (conduction and valence bands). ,, Due to the piezoelectric effect, photogenerated charge carriers are further separated. The separated photo-induced electrons and holes (free electric charges) at the opposite surface sides of the thin film (BTO/AgNPs) to act as an anode and cathode, respectively, thus participate in redox reactions to form ROS such as hydroxyl and superoxide radicals.…”

Ultrasound waves at the service of photocatalysis: From sonochemical synthesis to ultrasound-assisted and piezo-enhanced photocatalysis

“…Indeed, the piezo-potential can effectively tune the carrier migration at the heterojunction interface by modulating the barrier height (piezo-phototronic effect) [3]. Among these systems, composites of noble metals and piezophotocatalysts have recently shown great potential due to the coupling of plasmonic and piezotronic effects [43][44][45][46][47]. On one hand, noble metal nanoparticles provide visible light-response in composites with large bandgap piezophotocatalysts (e.g., inorganic perovskites [43] and ZnO [44,45]) by localized surface plasmon resonance.…”