Turbulence Enhanced Ferroelectric-nanocrystal-based Photocatalysis in Urchin-like TiO/BaTiO Microspheres for Hydrogen Evolution

Overview

Journal Nanoscale Adv

Publisher Royal Society of Chemistry

Specialty Biotechnology

Date 2022 Sep 22

PMID 36133275

Authors

Haidong Li

Yanyan Song

Jiyun Zhang

Jiating He

Affiliations

Soon will be listed here.

Abstract

The application of a built-in electric field due to piezoelectric potential is one of the most efficient approaches for photo-induced charge transport and separation. However, the efficiency of converting mechanical energy to chemical energy is still very low, and the enhancement of photocatalysis, thus, is limited. To overcome this problem, here, we propose sonophotocatalysis based on a new hybrid photocatalyst, which combines ferroelectric nanocrystals (BaTiO) and dendritic TiO to form an urchin-like TiO/BaTiO hybrid photocatalyst. Under periodic ultrasonic excitation, a spontaneous polarization potential of BaTiO nanocrystals in response to ultrasonic waves can act as an alternating built-in electric field to separate photoinduced carriers incessantly, which can significantly enhance the photocatalytic activity and cyclic performance of the urchin-like TiO/BaTiO catalyst. More importantly, the significant enhancement of photocatalytic hydrogen evolution is due to the coupling effect of two types of piezoelectric potential in the presence of BaTiO nanocubes as well as the semiconductor and optical properties of TiO nanowires of the urchin-like TiO/BaTiO hybrid structure under simulated sunlight and periodic ultrasonic irradiation, which can significantly improve the efficiency of converting mechanical energy to chemical energy.

Citing Articles

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PMID: 37941959 PMC: 10628993. DOI: 10.1039/d3na00309d.

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