Detail publikace

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

Originální název

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

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

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

Vydáno

10. 1. 2024

Nakladatel

PERGAMON-ELSEVIER SCIENCE LTD

Místo

OXFORD

ISSN

1873-3859

Periodikum

ELECTROCHIMICA ACTA

Ročník

474

Číslo

143545

Stát

Spojené království Velké Británie a Severního Irska

Strany počet

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"
}