Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 156, Issue -, Pages 122-127Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2014.03.002
Keywords
Carbon nitride; WS2; Cocatalyst; Photocatalytic H-2 evolution
Funding
- 973 Program [2013CB632405]
- NSFC [21203030, 21033003]
- Specialized Research Fund for the Doctoral Program of Higher Education Program [20113514120001]
- Program for New Century Excellent Talents in University of Fujian Province [JA13020]
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Mesoporous graphitic$ carbon nitride (mpg-CN) was loaded with WS2 via an impregnation sulfidation approach. The resultant surface heterojunctions between WS2 and mpg-CN were evidently confirmed with transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Photocatalytic H-2 production on WS2/mpg-CN under visible light (lambda > 420 nm) shows that WS2 plays an important role in catalyzing H-2 production. The rate of hydrogen evolution reaches an optimum when the loading amount of WS2 is about 0.3 at.%. Combined with the physicochemical and electrocatalytic properties of WS2/mpg-CN, it can be concluded that the enhanced photocatalytic H-2 production activity on WS2/mpg-CN is mainly attributed to the thin layered junctions formed between WS2 and mpg-CN and the great performance of WS2 as a cocatalyst in H-2 evolution reaction. (C) 2014 Elsevier B.V. All rights reserved.
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