Degradation and Mineralization of Benzohydroxamic Acid by Synthesized Mesoporous La/TiO2
AbstractRare earth element La-doped TiO2 (La/TiO2) was synthesized by the sol-gel method. Benzohydroxamic acid was used as the objective pollutant to investigate the photocatalytic activity of La/TiO2. The physicochemical properties of the prepared materials were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, UV-vis diffuse reflectance spectroscopy, specific surface area and porosity, scanning electron microscopy and transmission electron microscopy. As a result, the doping of La could inhibit the crystal growth of TiO2, increase its specific surface area and expand its response to visible light, thus improving its photocatalytic activity. La/TiO2 with the doping ratio of 0.75% calcined at 500 °C, showing the highest photocatalytic activity to degrade benzohydroxamic acid under the irradiation of 300 W mercury lamp. About 94.1% of benzohydroxamic acid with the original concentration at 30 mg·L−1 was removed after 120 min in a solution of pH 4.4 with an La/TiO2 amount of 0.5 g·L−1. Furthermore, 88.5% of the total organic carbon was eliminated after 120 min irradiation. In addition, after four recycling runs, La/TiO2 still kept high photocatalytic activity on the photodegradation of benzohydroxamic acid. The interfacial charge transfer processes were also hypothesized. View Full-Text
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Luo, X.; Wang, J.; Wang, C.; Zhu, S.; Li, Z.; Tang, X.; Wu, M. Degradation and Mineralization of Benzohydroxamic Acid by Synthesized Mesoporous La/TiO2. Int. J. Environ. Res. Public Health 2016, 13, 997.
Luo X, Wang J, Wang C, Zhu S, Li Z, Tang X, Wu M. Degradation and Mineralization of Benzohydroxamic Acid by Synthesized Mesoporous La/TiO2. International Journal of Environmental Research and Public Health. 2016; 13(10):997.Chicago/Turabian Style
Luo, Xianping; Wang, Junyu; Wang, Chunying; Zhu, Sipin; Li, Zhihui; Tang, Xuekun; Wu, Min. 2016. "Degradation and Mineralization of Benzohydroxamic Acid by Synthesized Mesoporous La/TiO2." Int. J. Environ. Res. Public Health 13, no. 10: 997.
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