Publication detail

Comparing the performance of WO3 nanoparticles and nanofibers: Photocatalytic dye degradation versus photoelectrochemical water oxidation

Expósito-Gálvez, JC Hromadko, L Sepúlveda, M Peón-Díaz, FJ Coria-Quiñones, SD Jimenez-Sandoval, O Macak, JM Oskam, G

Original Title

Comparing the performance of WO3 nanoparticles and nanofibers: Photocatalytic dye degradation versus photoelectrochemical water oxidation

Type

journal article in Web of Science

Language

English

Original Abstract

Nanostructured WO3 is a widely studied, attractive material for photocatalysis applications, ranging from degradation of organic contaminants to water photooxidation, related to its relatively small bandgap, good stability, and adequate charge transport and charge transfer efficiencies. In catalysis, a large surface-to-volume ratio generally improves activity; however, this is not always the case for photoelectrochemical systems. In this work, we compare the photocatalytic and photoelectrochemical performance of commercial WO3 nanoparticles with that of WO3 nanofibers prepared by centrifugal spinning. The photocatalytic dye degradation kinetics are faster for the nanofibers, related to their larger specific surface area. On the other hand, the photoelectrochemical performance is essentially the same for both materials. This fundamental difference in performance is demonstrated to be due to the influence of trap-limited electron transport on the collection efficiency of photoelectrons, required for the observation of photocurrent in the external circuit, whereas photocatalysis is more surfacedriven.

Keywords

WO 3 nanofibers; Intensity-modulated photocurrent spectroscopy; (IMPS); Photocatalysis; Charge transport; Solar water splitting

Authors

Expósito-Gálvez, JC ; Hromadko, L; Sepúlveda, M; Peón-Díaz, FJ; Coria-Quiñones, SD; Jimenez-Sandoval, O; Macak, JM; Oskam, G

Released

10. 1. 2024

Publisher

PERGAMON-ELSEVIER SCIENCE LTD

Location

OXFORD

ISBN

1873-3859

Periodical

ELECTROCHIMICA ACTA

Year of study

474

Number

143545

State

United Kingdom of Great Britain and Northern Ireland

Pages count

8

URL

https://www.sciencedirect.com/science/article/pii/S0013468623017164?via%3Dihub

BibTex

@article{BUT196716,
  author="Jan {Macák} and Juan Carlos {Expósito-Gálvez} and Luděk {Hromádko} and Lina Marcela {Sepúlveda Sepúlveda} and Peón-Díaz {Francisco J.} and Omar {Jiménez Sandoval} and Gerko {Oskam} and Sayda Dinorah {Coria-Quiñones}",
  title="Comparing the performance of WO3 nanoparticles and nanofibers: Photocatalytic dye degradation versus photoelectrochemical water oxidation",
  journal="ELECTROCHIMICA ACTA",
  year="2024",
  volume="474",
  number="143545",
  pages="8",
  doi="10.1016/j.electacta.2023.143545",
  issn="1873-3859",
  url="https://www.sciencedirect.com/science/article/pii/S0013468623017164?via%3Dihub"
}