Tuning oxygen vacancies in Bi4Ti3O12 nanosheets to boost piezo-photocatalytic activity

Z-Scheme CdIn2S4/Bi2WO6 Heterojunction for High Piezo-Photo Synergetic Performance

“…Therefore, piezocatalysis and photocatalysis can be combined as an efficient piezo-photocatalysis process, in which catalysts are simultaneously excited by mechanical vibrations and light irradiation. As a result, several piezo-photocatalytic semiconductors, such as Ag/BiFeO 3 , Bi 4 Ti 3 O 12 , and BiOBr, have been investigated for boosting the piezo-photocatalytic activity.…”

Macroscopic Spontaneous Piezopolarization and Oxygen-Vacancy Coupled Robust NaNbO3/FeOOH Heterojunction for Pharmaceutical Drug Degradation and O2 Evolution: Combined Experimental and Theoretical Study

“…When subjected to light illumination, the internal electric fields engineered by polarization, resulting from strain-induced/intrinsic ionic displacement in piezoelectrics and ferroelectrics, effectively control the recombination/separation/transport of photoinduced electron–hole pairs, enabling high activity. , As a result, there is strong motivation to combine photocatalysis with piezocatalysis. In photocatalysis, surface Ovs are responsible for broadening and intensifying light absorption, modifying surface properties to lower surface-adsorption barriers, and serving as trapping sites for excited electrons, thus impeding carrier recombination. − …”

In situ construction of a Sillén–Aurivillius layered perovskite-based 0D/2D homologous Schottky junction for efficient piezo-photocatalytic activity

“…15,16 Therefore, the internal electric field introduced by the piezoelectric effect could be used to further modulate the charge carrier transport behaviors in the photocatalytic system, that is, to achieve the piezo-photocatalytic induced efficient redox process under the dual stimulation of ultrasonic vibration and light irradiation. 17,18 After introducing an external stress, the photocatalyst undergoes a strain that changes with the direction of the force. With the direction of the applied stress constantly changing, the piezoelectric photocatalyst will generate an alternating polarized electric field, which effectively reduces the shielding effect caused by the built-in electric field of the heterojunction, thus the built-in electric field can continue to play a role in promoting carrier separation.…”

“…32 The 2D shape is a suitable architecture for maximizing deformation under mechanical vibrations. 17 Inspired by the above analysis, it is promising to significantly improve the inherent charge separation efficiency through boosting the coupling effect of piezo-photocatalysis in a homologous Schottky heterojunction. Nevertheless, to the best of our knowledge, there were few research studies that realize such a configuration.…”