Issue 24, 2011
From the journal:

Journal of Materials Chemistry

Preparation of new sulfur-doped and sulfur/nitrogen co-doped CsTaWO6 photocatalysts for hydrogen production from water under visible light

Roland Marschall,a   Aniruddh Mukherji,a   Akshat Tanksale,a   Chenghua Sun,b   Sean C. Smith,b   Lianzhou Wang*a  and  Gao Qing (Max) Lu*a  

* Corresponding authors

a ARC Centre of Excellence for Functional Nanomaterials, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, Australia
E-mail: l.wang@uq.edu.au, m.lu@uq.edu.au

b Centre for Computational Molecular Science, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, Australia

Abstract

Wide band gap semiconductor photocatalyst CsTaWO6 (3.8 eV) was anion-doped via simple gas–solid reactions to extend its absorption into the visible light range. Sulfur doping and sulfur/nitrogen co-doping were performed, using sulfur powder and ammonia as precursors, resulting in decreased band gaps of doped CsTaWO6 down to 2.06 eV. The resulting materials CsTaWO6−xSx and CsTaWO6−x−ySxNy were investigated concerning their chemical and electronic structures via experimental characterizations and first principle calculations. Sulfur and sulfur/nitrogen doped CsTaWO6 crystals showed a clear red shift in absorption, and the anionic dopants were detected using X-ray photoelectron spectroscopy. Photocatalytic performance tests for the doped materials evaluated the capability of generating ˙OH radicals for photocatalytic reactions. Water splitting tests of the photocatalysts using a new type of setup including quadrupole mass spectrometry revealed that the doped materials were more efficient in H2 production under simulated solar irradiation, in contrast to the undoped CsTaWO6 or P25. Co-doped CsTaWO6−x−ySxNy turned out to be the best material for H2 production, due to its capability in efficiently utilizing the visible light in the solar spectrum.

Graphical abstract: Preparation of new sulfur-doped and sulfur/nitrogen co-doped CsTaWO6 photocatalysts for hydrogen production from water under visible light

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/C0JM02549F
Article type
Paper
Submitted
05 Aug 2010
Accepted
08 Dec 2010
First published
16 May 2011

J. Mater. Chem., 2011,21, 8871-8879

Permissions

Request permissions

Preparation of new sulfur-doped and sulfur/nitrogen co-doped CsTaWO6 photocatalysts for hydrogen production from water under visible light

R. Marschall, A. Mukherji, A. Tanksale, C. Sun, S. C. Smith, L. Wang and G. Q. (. Lu, J. Mater. Chem., 2011, 21, 8871 DOI: 10.1039/C0JM02549F

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.

Spotlight

Advertisements