Journal
CATALYSTS
Volume 9, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/catal9040329
Keywords
photocatalytic 3-nitrostyrene hydrogenation; heat treatment of TiO2; recombination
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Funding
- Ratchadapisek Sompoch Endowment Fund
- Chulalongkorn University [CU-59-006-IC]
- Newton Mobility Grants
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In this work, we investigate the effect of TiO2 properties on the photocatalytic selective hydrogenation of 3-nitrostyrene (3-NS) to 3-vinylaniline (3-VA). The P25-TiO2 photocatalysts were calcined at 600-900 degrees C using different gases (Air, N-2, and H-2) and characterized by XRD, N-2 physisorption, XPS, UV-Vis, and PL spectroscopy. In the photocatalytic hydrogenation of 3-nitrostyrene in isopropanol, the selectivity of 3-vinylaniline of the treated TiO2 was almost 100%. A linear correlation between the 3-NS consumption rate and PL intensity was observed. Among the catalysts studied, P25-700-air, which possessed the lowest PL intensity, exhibited the highest photocatalytic activity due to the synergistic effect that resulted from its high crystallinity and the optimum amount of anatase/rutile phase content, leading to the reduction of the electron-hole recombination process.
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