Abstract
Highly active TiO2 photocatalysts prepared at a low temperature are promising reagents to degrade organic pollutants. Moreover, the addition of macroporous resins should overcome the poor adsorption properties of TiO2. Here we prepared N-doped TiO2/macroporous resin composites at low temperatures using a hydrothermal-assisted sol–gel method. The results show that the composites have a spherical appearance, which is controlled by the macroporous resin. The composites exhibit high specific surface areas, and the microstructure can be tuned by the temperature. N can be doped into the TiO2 crystal by substitution of oxygen at a lower temperature. N-doped TiO2 particles are distributed on the surface with a dominant crystal form of anatase. The composite prepared at 200 °C gave the best performance for the photocatalytic degradation of rhodamine B, with removal efficiency of 74.8% following 240-min irradiation.
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Acknowledgements
We gratefully acknowledge the support of this research by the Major Science and Technology Program for Water Pollution Control and Treatment (2017ZX07206002), National Natural Science Foundation of China (No. 21377095) and China Postdoctoral Science Foundation (2018M630986).
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Louangsouphom, B., Wang, X., Song, J. et al. Low-temperature preparation of a N-TiO2/macroporous resin photocatalyst to degrade organic pollutants. Environ Chem Lett 17, 1061–1066 (2019). https://doi.org/10.1007/s10311-018-00827-z
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DOI: https://doi.org/10.1007/s10311-018-00827-z