Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 32, Issue 1, Pages 86-92Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2006.04.007
Keywords
photocatalyst; InVO4; water splitting; hydrogen energy
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The photocatalytic activities of InVO4 and NiO/InVO4 for water splitting under visible light irradiation were investigated. NiO/InVO4 photocatalysts pretreated by different process were also investigated. The catalysts were characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and UV-vis spectroscopy. The photocatalytic reaction was carried out in a Pyrex glass reactor under visible light irradiation. The XRD patterns indicated that the InVO4 material was fully crystallized. SEM images showed that after loading NiO, many pin-holes were observed on the surface of the InVO4 particles. The particle size of the catalyst was about 5 Pm. The band gap of InVO4 samples was 1.8 eV as estimated from UV-vis spectra. InVO4 was very active to produce H-2. The NiO/InVO4 catalyst which was reduced at 500 degrees C for 2 h and then oxidized at ambient condition for 48 h gave the highest activity, which demonstrated that the pre-treatment process plays a key role in creating high catalytic performance for the NiO/InVO4 catalyst. (c) 2006 International Association for Hydrogen Energy.
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