Abstract
Nanocrystalline N-doped TiO2 powders were successfully prepared by hydrothermal reaction for 2 h at low temperature (120 °C) and at an applied pressure of 3 MPa. The grain size of the powders (calculated by use of Scherrer’s method) ranged from 8.2 to 10.2 nm. The BET specific surface area ranged from 151.0 to 220.0 m2/g. A significant shift of the light absorption edge toward the visible light zone was observed in the UV–visible spectra. XPS results showed that nitrogen atoms were incorporated into the TiO2 lattice. The photocatalytic activity of the synthesized N-doped TiO2 powders was evaluated by measurement of photodegradation of methylene blue (MB) in aqueous solution under visible light irradiation. The amount of MB degraded increased with increasing illumination intensity.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (grant no. 51072019), the National High Technology Research and Development Program of China (grant no. 2012AA030302), and the Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure under the grant SKL201112SIC.
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Xu, J., Liu, Q., Lin, S. et al. One-step synthesis of nanocrystalline N-doped TiO2 powders and their photocatalytic activity under visible light irradiation. Res Chem Intermed 39, 1655–1664 (2013). https://doi.org/10.1007/s11164-012-0899-9
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DOI: https://doi.org/10.1007/s11164-012-0899-9