Characterization of La/Fe/TiO 2 and Its Photocatalytic Performance in Ammonia Nitrogen Wastewater

Xianping Luo, Chunfei Chen, Jing Yang, Junyu Wang, Qun Yan, Huquan Shi and Chunying Wang
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Xianping Luo: School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
Chunfei Chen: School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
Jing Yang: School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
Junyu Wang: School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
Qun Yan: School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
Huquan Shi: School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
Chunying Wang: School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

IJERPH, 2015, vol. 12, issue 11, 1-14

Abstract: La/Fe/TiO 2 composite photocatalysts were synthesized by Sol-Gel method and well characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen-physical adsorption, and UV-Vis diffuse reflectance spectra (UV-Vis DRS). It is interesting that the doped catalysts were in anatase phase while the pure TiO 2 was in rutile phase. In addition, the composites possessed better physical chemical properties in photocatalytic activity than pure TiO 2 : stronger visible-light-response ability, larger specific surface area, and more regular shape in morphology. The photodegradation results of ammonia nitrogen indicate that: the La/Fe/TiO 2 had higher catalytic activity to ammonia nitrogen waste water compared pure TiO 2 and the other single metal-doped TiO 2 . pH 10 and 2 mmol/L H 2 O 2 were all beneficial to the removal of ammonia nitrogen by La/Fe/TiO 2 . However, the common inorganic ions of Cl ? , NO 3 ? , SO 4 2? , HCO 3 ? /CO 3 2 ? , Na + , K + , Ca 2+ and Mg 2+ in water all inhibited the degradation of ammonia nitrogen. By balance calculation, at least 20% of ammonia nitrogen was converted to N 2 during the 64.6% removal efficiency of ammonia nitrogen.

Keywords: characterization; photocatalysis; La/Fe/TiO 2; ammonia nitrogen wastewater (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2015
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