Issue 32, 2020

Exclusive enhancement of catalytic activity in Bi0.5Na0.5TiO3 nanostructures: new insights into the design of efficient piezocatalysts and piezo-photocatalysts

Abstract

Piezocatalysis and piezo-photocatalysis have recently emerged as promising strategies to address energy and environmental issues through harvesting mechanical energy. Herein, we report that electrical conductivity, rather than piezoelectric coefficient, is more decisive in determining piezocatalytic and piezopotential enhanced photocatalytic activities. The high electrical conductivity of Bi0.5Na0.5TiO3 leads to superior piezo-photocatalytic catalytic activity compared to other reported piezocatalysts for water splitting (H2 production of 158 μmol g−1 h−1), Cr(VI) reduction (first-order rate constant of 0.045 min−1), and degradation of organic pollutants (first-order rate constant of 0.061 min−1 for RhB) by introducing sunlight and ultrasonic mechanical vibration with a frequency of 20–80 kHz. Furthermore, the mechanical power, vibration frequency, and particle size of the material are important factors to optimize the piezocatalytic and piezo-photocatalytic performance. This work provides a useful guide to design new piezocatalytic or piezo-photocatalytic materials by synergistically considering the electrical conductivity and piezoelectric coefficient.

Graphical abstract: Exclusive enhancement of catalytic activity in Bi0.5Na0.5TiO3 nanostructures: new insights into the design of efficient piezocatalysts and piezo-photocatalysts

Supplementary files

Article information

Article type
Paper
Submitted
23 דצמ 2019
Accepted
07 מאי 2020
First published
12 מאי 2020

J. Mater. Chem. A, 2020,8, 16238-16245

Exclusive enhancement of catalytic activity in Bi0.5Na0.5TiO3 nanostructures: new insights into the design of efficient piezocatalysts and piezo-photocatalysts

Z. Zhao, L. Wei, S. Li, L. Zhu, Y. Su, Y. Liu, Y. Bu, Y. Lin, W. Liu and Z. Zhang, J. Mater. Chem. A, 2020, 8, 16238 DOI: 10.1039/C9TA14007G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements