Adsorption and Photoelectrodeposition of Heavy Metal Ions from Wastewater using SnOx(2)/CeO2 Photocatalysts
Keywords:
amorphous tin oxide, cerium oxide, lead ion removal, photoelectrodeposition, wastewater treatment
Abstract
Novel SnOx 1 x 2 CeO2 photocatalysts showed high adsorption and UV light-driven photoelectrodeposition activities for removal of heavy metal ions from water The X-ray diffraction and the X-ray photoelectron spectroscopy analyses revealed that an amorphous SnOx 1 x 2 loaded on a high crystallinity CeO2 Amounts of Pb2 removal of 20 wt of SnOx loading on CeO2 were significantly higher than those of CeO2 only and SnO2 only due to the synergistic interaction between the high photocatalytic activity of the CeO2 and the high adsorptive ability of the SnOx Results of Pb2 removal indicated that the photoelectrodeposition occurred via adsorption of Pb2 on the SnOx surface with surface hydroxyl groups Furthermore it was suggested that not only Pb2 but also Cu2 Cd2 Hg2 Se4 As3 and Cr6 can be removed by the SnOx CeO2 photocatalysts It is therefore expected that the SnOx 1 x 2 CeO2 can be used as the photocatalysts for purification of wastewater
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2018-01-15
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