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https://hdl.handle.net/2440/126802
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Type: | Journal article |
Title: | Nanostructured Co-Mn containing perovskites for degradation of pollutants: insight into the activity and stability |
Author: | Miao, J. Sunarso, J. Duan, X. Zhou, W. Wang, S. Shao, Z. |
Citation: | Journal of Hazardous Materials, 2018; 349:177-185 |
Publisher: | Elsevier |
Issue Date: | 2018 |
ISSN: | 0304-3894 1873-3336 |
Statement of Responsibility: | Jie Miao, Jaka Sunarso, Xiaoguang Duan, Wei Zhou, Shaobin Wang, Zongping Shao |
Abstract: | The efficient oxidative removal of persistent organic components in wastewater relies on low-cost heterogeneous catalysts that offer high catalytic activity, stability, and recyclability. Here, we designed a series of nanostructured Co-Mn containing perovskite catalysts, LaCo₁-ₓMnₓO₃₊δ (LCM, x = 0, 0.3, 0.5, 0.7, and 1.0), with over-stoichiometric oxygen (δ > 0) to show superior catalytic activity for the degradation of a variety of persistent aqueous organic pollutants by activating peroxymonosulfate (PMS). The nature of LCM for catalysis was comprehensively investigated. A "volcano-shaped" correlation was observed between the catalytic activity and electron filling (eg) of Co in LCM. Among these compounds, LaCo₀.₅Mn₀.₅O₃₊δ (LCM55) exhibited an excellent activity with eg = 1.27. The high interstitial oxygen ion diffusion rate (DO²⁻ = 1.58 ± 0.01 × 10⁻¹³ cm² s⁻¹) of LCM55 also contributes to its catalytic activity. The enhanced stability of LCM55 can be ascribed to its stronger relative acidity (3.22). Moreover, an increased solution pH (pH ≥ 7) generated a faster organic degradation rate and a decrease in metal leaching (0.004 mM) for LCM55 perovskite, justifying it as a potential material for environmental remediation. |
Keywords: | Perovskite Over-stoichiometric oxygen Organic pollutants PMS e(g) occupancy |
Rights: | © 2018 Elsevier B.V. All rights reserved. |
DOI: | 10.1016/j.jhazmat.2018.01.054 |
Published version: | http://dx.doi.org/10.1016/j.jhazmat.2018.01.054 |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
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