Jump to main content
Jump to site search

Issue 35, 2018
Previous Article Next Article

A core–satellite structured Z-scheme catalyst Cd0.5Zn0.5S/BiVO4 for highly efficient and stable photocatalytic water splitting

Author affiliations

Abstract

Fabrication of a Z-scheme photocatalytic system for hydrogen production and overall water splitting has huge potential in confronting the increasing worldwide energy crisis. But it is highly challenging to realize due to the harsh requirement for band edge levels and interfacial contact. Herein, we report the preparation of a high-efficiency and stable Z-scheme catalyst Cd0.5Zn0.5S–BiVO4 with a core–satellite structure through the charge-induced assembly process in a mild water bath. A Cd0.5Zn0.5S–BiVO4 Z-scheme junction shows an enormously enhanced photocatalytic activity for H2 evolution under visible light illumination. The optimal photocatalytic H2 evolution rate reaches 2.35 mmol g−1 h−1, which is 7.13 times higher than that of Cd0.5Zn0.5S, and an appreciable apparent quantum efficiency of 24.1% at λ = 420 nm was achieved. In particular, without any sacrificial donor, the Cd0.5Zn0.5S–BiVO4 Z-scheme junction can overall split water into H2 and O2. The efficient photocatalytic activity of Cd0.5Zn0.5S–BiVO4 is attributed to the formation of an intimate core–satellite structure and a Z-scheme photocatalytic mechanism, which not only greatly benefit the charge separation, but also prompt the photoinduced holes from Cd0.5Zn0.5S to rapidly recombine with the electrons of BiVO4, hence reserving the most favorable reductive and oxidative reaction sites. Meanwhile, it inhibits the photocorrosion of Cd0.5Zn0.5S, guaranteeing the high photochemical stability (no activity decay after half a year). This work provides a new reference for the fabrication of a high-performance Z-schematic photocatalyst for water splitting.

Graphical abstract: A core–satellite structured Z-scheme catalyst Cd0.5Zn0.5S/BiVO4 for highly efficient and stable photocatalytic water splitting

Back to tab navigation

Supplementary files

Article information


Submitted
08 May 2018
Accepted
25 Jul 2018
First published
31 Jul 2018

J. Mater. Chem. A, 2018,6, 16932-16942
Article type
Paper

A core–satellite structured Z-scheme catalyst Cd0.5Zn0.5S/BiVO4 for highly efficient and stable photocatalytic water splitting

C. Zeng, Y. Hu, T. Zhang, F. Dong, Y. Zhang and H. Huang, J. Mater. Chem. A, 2018, 6, 16932 DOI: 10.1039/C8TA04258F

To request permission to reproduce material from this article, 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 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

Search articles by author

Spotlight

Advertisements