| Summary: | Strain-induced internal electric fields present a significant path to boosting the separation of photoinduced electrons and holes. In addition, piezo-induced positive/negative pairs could be released smoothly, taking advantage of the excellent electroconductibility of some conductors. Herein, the hybrid piezo-photocatalysis is constructed by combining debut piezoelectric nanosheets (Bi<sub>4</sub>O<sub>5</sub>I<sub>2</sub>) and typical conductor multiwalled carbon nanotubes (CNT). The photocatalytic degradation efficiency that the hybrid CNT/Bi<sub>4</sub>O<sub>5</sub>I<sub>2</sub> exhibits was remarkably increased by more than 2.3 times under ultrasonic vibration, due to the piezo-generated internal electric field. In addition, the transient photocurrent spectroscopy and electrochemical impedance measurement reveal that the CNT coating on Bi<sub>4</sub>O<sub>5</sub>I<sub>2</sub> enhances the piezo-induced positive/negative migration. Therefore, the piezocatalytic activity of CNT/Bi<sub>4</sub>O<sub>5</sub>I<sub>2</sub> could be improved by three times, compared with pure Bi<sub>4</sub>O<sub>5</sub>I<sub>2</sub> nanosheets. Our results may offer promising approaches to sketching efficient piezo-photocatalysis for the full utilization of solar energy or mechanical vibration.
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