Affiliation:
1. Université de Tunis El‐Manar Faculté des Sciences de Tunis Laboratoire de Chimie Analytique et Électrochimie LR99ES15 Campus Universitaire de Tunis El‐Manar Tunis 2092 Tunisie
2. Université Paris‐Saclay CentraleSupélec Laboratoire Structures Propriétés et Modélisation des Solides UMR CNRS 8580 Gif‐sur‐Yvette 91190 France
3. Jožef Stefan Institute and Jožef Stefan Postgraduate School Jamova 39 Ljubljana 1000 Slovenia
4. Unité Mixte de Physique CNRS, Thales, Université Paris‐Saclay Palaiseau 91167 France
5. Department of Physics and Materials Science University of Luxembourg and Materials Research and Technology Department Luxembourg Institute of Science and Technology Belvaux L‐4422 Luxembourg
Abstract
AbstractRecently, piezoelectric‐based catalysis has been demonstrated to be an efficient means and promising alternative to sunlight‐driven photocatalysis, where mechanical vibrations trigger redox reactions. Here, 60 nm‐size BiFeO3 nanoparticles are shown to be very effective for piezo‐degrading Rhodamine B (RhB) model dye with record degradation rate reaching 13 810 L mol−1 min−1, and even 41 750 L mol−1 min−1 (i.e., 100% RhB degradation within 5 min) when piezocatalysis is synergistically combined with sunlight photocatalysis. These BiFeO3 piezocatalytic nanoparticles are also demonstrated to be versatile toward several dyes and pharmaceutical pollutants, with over 80% piezo‐decomposition within 120 min. The maintained high piezoelectric coefficient combined with low dielectric constant, high‐elastic modulus, and the nanosized shape make these BiFeO3 nanoparticles extremely efficient piezocatalysts. To avoid subsequent secondary pollution and enable their reusability, the BiFeO3 nanoparticles are further embedded in a polymer P(VDF‐TrFE) matrix. The as‐designed flexible, chemically stable, and recyclable nanocomposites still keep remarkable piezocatalytic and piezo‐photocatalytic performances (i.e., 92% and 100% RhB degradation, respectively, within 20 min). This work opens a new research avenue for BiFeO3 that is the model multiferroic and offers a new platform for water cleaning, as well as other applications such as water splitting, CO2 reduction, or surface purification.
Funder
Agence Nationale de la Recherche
Javna Agencija za Raziskovalno Dejavnost RS
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
19 articles.
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