期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 202, 期 -, 页码 227-241出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2018.03.019
关键词
Rhodamine B; Fenton-like photocatalyst; CuO/LaFeO3 nanocomposite; Visible light irradiation; Reusability
资金
- Research Office of Amirkabir University of Technology (Tehran Polytechnic)
A series of these novel CuO(x)/LaFeO3 (x = 0-100%) nanocomposite photocatalysts were successfully fabricated by the sol-gel method. The obtained nanoparticles were characterized by several analysis techniques such as XRD, FT-IR, UV-Vis DRS, photoluminescence, TEM and EDS for identifying their structural, physical and optical characteristics. The photocatalytic activities of CuO(x)/LaFeO3 nanoparticles were examined by photo degradation of Rhodamine B (RhB) under the visible light irradiation. The most improvement was achieved in the photocatalytic activity of the CuO(50%)/LaFeO3 nanocomposite compared to those of the pure LaFeO3 and other composites. It was interesting that addition of a low amount of H2O2 (0.5 mL) greatly improved the photocatalytic performance so that a 6 ppm RhB was degraded only in dark (after 60 min without light illumination) and high concentration of RhB (30 ppm) was removed after 90 min. Furthermore, a 20 ppm phenol contaminant was destroyed after 150 min using the CuO(50%)/LaFeO3 in presence of H2O2. These outstanding results could be ascribed to the simultaneous effects of the photocatalysis and Fenton-like mechanism that enhanced the photocatalytic efficiency. It was proposed that the non-toxic, inexpensive, highly active and stable CuO(50%)/LaFeO3 nanocomposite photocatalyst have the potential to be used in practical industrial water treatment processes under the visible light illumination.
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