期刊
CATALYSIS SCIENCE & TECHNOLOGY
卷 2, 期 4, 页码 818-823出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2cy00499b
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资金
- PRESTO/JST
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan
- KAITEKI Institute, Inc.
The effects of the preparation conditions of ZrO2-modified TaON (referred to as ZrO2/TaON) on the photocatalytic activity for H-2 evolution under visible light (lambda > 420 nm) were investigated. ZrO2/TaON catalysts were prepared by loading particulate Ta2O5 with ZrO2 using different zirconium precursors, followed by nitridation at 1123 K for different durations (5-20 h) under NH3 flow. Nitridation of ZrO2/Ta2O5 for 15 h resulted in the production of ZrO2/TaON, regardless of the zirconium precursors used, but the physicochemical properties varied. The highest activity was obtained for ZrO2/TaON synthesized from Ta2O5 and ZrO(NO3)(2)center dot 2H(2)O (Zr/Ta = 0.1 by mole) after nitridation for 15 h. Physicochemical analysis suggested that a lower density of anionic defects in TaON, which was realized using highly-dispersed ZrO2 nanoparticles (10-30 nm in size), contributed primarily to the enhanced activity.
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