Photodeposition of CoOx nanoparticles on BiFeO3 nanodisk for efficiently piezocatalytic degradation of rhodamine B by utilizing ultrasonic vibration energy

Linkun Wang; Junfeng Wang; Chenyin Ye; Kaiqi Wang; Chunran Zhao; Ying Wu; Yiming He

Ultrasonics Sonochemistry (Dec 2021)

Photodeposition of CoOx nanoparticles on BiFeO3 nanodisk for efficiently piezocatalytic degradation of rhodamine B by utilizing ultrasonic vibration energy

Linkun Wang,
Junfeng Wang,
Chenyin Ye,
Kaiqi Wang,
Chunran Zhao,
Ying Wu,
Yiming He

Affiliations

Linkun Wang: Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua, 321004, China
Junfeng Wang: Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua, 321004, China
Chenyin Ye: Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua, 321004, China
Kaiqi Wang: Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua, 321004, China
Chunran Zhao: Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua, 321004, China
Ying Wu: Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, 321004, China; Corresponding authors at: Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua, 321004, China (Y. He).
Yiming He: Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua, 321004, China; Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, 321004, China; Corresponding authors at: Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua, 321004, China (Y. He).

Journal volume & issue: Vol. 80
p. 105813

Abstract

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Piezoelectric materials have received much attention due to their great potential in environmental remediation by utilizing vibrational energy. In this paper, a novel piezoelectric catalyst, CoOx nanoparticles anchored BiFeO3 nanodisk composite, was intentionally synthesized via a photodeposition method and applied in piezocatalytic degradation of rhodamine B (RhB) under ultrasonic vibration. The as-synthesized CoOx/BiFeO3 composite presents high piezocatalytic efficiency and stability. The RhB degradation rate is determined to be 1.29 h−1, which is 2.38 folds higher than that of pure BiFeO3. Via optimizing the reaction conditions, the piezocatalytic degradation rate of the CoOx/BiFeO3 can be further increased to 3.20 h−1. A thorough characterization was implemented to investigate the structure, piezoelectric property, and charge separation efficiency of the CoOx/BiFeO3 to reveal the nature behind the high piezocatalytic activity. It is found that the CoOx nanoparticles are tightly adhered and uniformly dispersed on the surface of the BiFeO3 nanodisks. Strong interaction between CoOx and BiFeO3 triggers the formation of a heterojunction structure, which further induces the migration of the piezoinduced holes on the BiFeO3 to CoOx nanoparticles. The recombination of electron-hole pairs is retarded, thereby increasing the piezocatalytic performance greatly. This work may offer a new paradigm for the design of high-efficiency piezoelectric catalysts.

Published in Ultrasonics Sonochemistry

ISSN: 1350-4177 (Print); 1873-2828 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry; Science: Physics: Acoustics. Sound
Website: https://www.journals.elsevier.com/ultrasonics-sonochemistry

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