Issue 4, 2022

Type-II BiVO4/Ni3(hexahydroxytriphenylene)2 heterojunction photoanodes for effective photoelectrochemical reaction

Abstract

Semiconducting M3(hexahydroxytriphenylene)2 (M = Ni, Co, Cu; hexahydroxytriphenylene (HHTP)) was uniformly coated onto BiVO4 thin films via a facile solvothermal process, and the photoelectrochemical performance of the BiVO4/M3(HHTP)2 photoanodes was investigated. All three BiVO4/M3(HHTP)2 photoanodes exhibited higher photocurrent densities than pristine BiVO4. This can be attributed to the formation of type-II heterojunctions, as confirmed by ultraviolet photoelectron spectroscopy (UPS) and ultraviolet-visible spectroscopy. BiVO4/Ni3(HHTP)2 exhibited the highest photocurrent density of 4.66 mA cm−2 at 1.23 V vs. a reversible hydrogen electrode (RHE), an approximately 3.2-fold increase from that of pristine BiVO4. The results suggest that the type of metal ion in M3(HHTP)2 affects the electrical conductivity, which significantly influences the charge transport kinetics in the photoelectrochemical reactions of BiVO4. The mechanism underlying the enhanced photoelectrochemical reaction was also investigated.

Graphical abstract: Type-II BiVO4/Ni3(hexahydroxytriphenylene)2 heterojunction photoanodes for effective photoelectrochemical reaction

Supplementary files

Article information

Article type
Paper
Submitted
15 1 2022
Accepted
08 3 2022
First published
10 3 2022
This article is Open Access
Creative Commons BY-NC license

Energy Adv., 2022,1, 197-204

Type-II BiVO4/Ni3(hexahydroxytriphenylene)2 heterojunction photoanodes for effective photoelectrochemical reaction

J. W. Yoon, Y. Jo and J. Lee, Energy Adv., 2022, 1, 197 DOI: 10.1039/D2YA00008C

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, 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 commercial 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