Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 89, Issue 3-4, Pages 551-556Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2009.01.018
Keywords
Hydrothermal; Delafossite; AgMO2; Visible light; Photocatalytic
Funding
- National Natural Science Foundation of China [20537010, 20677009]
- National Basic Research Program of China [2007CB613306, 2007CB616907]
- Fujian Province [E0710009]
- New Century Excellent Talents in University [NCET-05-0572]
- State Education Ministry of PR China
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Delafossite-structured oxides AgMO2 (M = Al, Ga, In) were successfully synthesized using fluoro(ethylene-propylene) (FEP) pouch via a facile hydrothermal method. The obtained samples were characterized by X-ray diffraction (XRD), BET surface area measurement, UV-vis diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity of the as-prepared samples was evaluated by the degradation of rhodamine B (RhB) and methyl orange (MO) under visible light irradiation. All three samples showed photocatalytic activity for RhB and MO degradation under visible light irradiations and their photocatalytic activity followed the order of AgInO2 > AgGaO2 > AgAlO2. The relative high photocatalytic activity of AgInO2 can be attributed to its high quantity of the surface hydroxyl groups. The photocatalytic mechanism of AgInO2 was proposed and its stability was also investigated. (C) 2009 Elsevier B.V. All rights reserved.
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