Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
1136485
Reference Type
Journal Article
Title
Surface modification of TaON with monoclinic ZrO2 to produce a composite photocatalyst with enhanced hydrogen evolution activity under visible light
Author(s)
Maeda, K; Terashima, H; Kase, K; Higashi, M; Tabata, M; Domen, K
Year
2008
Is Peer Reviewed?
Yes
Journal
Bulletin of the Chemical Society of Japan
ISSN:
0009-2673
EISSN:
1348-0634
Volume
81
Issue
8
Page Numbers
927-937
DOI
10.1246/bcsj.81.927
Web of Science Id
WOS:000259512300002
Abstract
A composite material consisting of tantalum oxynitride (TaON) and monoclinic zirconium oxide (m-ZrO2) is prepared by a surface modification method as a photocatalyst with enhanced activity for H-2 evolution from water under visible light (lambda > 420 nm). The composite is prepared by loading particulate Ta2O5 with nanoparticulate m-ZrO2 followed by nitridation at 1123 K for 15 h under NH3 flow. The activity of the m-ZrO2/TaON composite for H, evolution from aqueous methanol solution is higher than that of either m-ZrO2 or TaON when loaded with nanoparticulate ruthenium as a H-2 evolution site. The highest activity is obtained using a composite prepared with a Zr/Ta molar ratio of 0.1. The optimized material also provides elevated activity when used as an H-2 evolution photocatalyst in Z-scheme overall water splitting in combination with Pt-loaded WO3 as an O-2 evolution photocatalyst and an IO3-/I- shuttle redox mediator. The improvement in activity is attributed to the suppression of surface defect formation by inhibiting tantalum reduction during nitridation.
Tags
IRIS
•
Methanol (Non-Cancer)
Search 2012
WOS
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity