title: Lanthanum cobaltite perovskite supported on zirconia as an efficient heterogeneous catalyst for activating Oxone in water.
abstract: Zirconia-supported LaCoO3perovskite (LaCoO3/ZrO2(LCZ)) is prepared and adopted for the first time as a heterogeneous catalyst for activating Oxone to degrade organic pollutants. The resulting LCZ exhibits a significantly higher surface area (i.e., 10 times) than bulk LaCoO3powder as nanoscale LaCoO3particles were easily afforded on the surface of ZrO2support. As Rhodamine B (RB) decolorization is selected as a model test to evaluate catalytic activity for activating Oxone, LCZ showed a much higher catalytic activity to activate Oxone than LaCoO3even though LCZ contained only 12.5wt% of LaCoO3. LCZ-activated Oxone also remained effective for RB decolorization even in the presence of salts and other organic contaminant. The mechanism of RB decolorization by LCZ-activated Oxone was revealed and involved sulfate radical and other reactive oxygen species. The mechanism of Oxone activation by LCZ could be owing to both La3+and Co3+of LCZ. LCZ was recycled to activate Oxone for RB decolorization over multiple times without loss of catalytic activity. These results demonstrate that LCZ is a promising LaCoO3-based nanocomposite as a heterogeneous catalyst for activating Oxone to degrade organic pollutants.
authors.affiliation: Department of Environmental Engineering, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung, Taiwan. Electronic address: linky@nchu.edu.tw.
authors.forename: Kun-Yi Andrew
authors.initials: KA
authors.lastname: Lin
authors.affiliation: Department of Environmental Engineering, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung, Taiwan.
authors.forename: Yu-Chien
authors.initials: YC
authors.lastname: Chen
authors.affiliation: Department of Environmental Engineering, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung, Taiwan.
authors.forename: Tien-Yu
authors.initials: TY
authors.lastname: Lin
authors.affiliation: Department of Chemical Engineering, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung, Taiwan. Electronic address: hyang@nchu.edu.tw.
authors.forename: Hongta
authors.initials: H
authors.lastname: Yang
keywords: LaCoO(3); Oxone; Perovskite; Rhodamine B; Zirconia