Nanostructured Co-Mn containing perovskites for degradation of pollutants: Insight into the activity and stability
|dc.identifier.citation||Miao, J. and Sunarso, J. and Duan, X. and Zhou, W. and Wang, S. and Shao, Z. 2018. Nanostructured Co-Mn containing perovskites for degradation of pollutants: Insight into the activity and stability. Journal of Hazardous Materials. 349: pp. 177-185.|
© 2018 Elsevier B.V. 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, LaCo 1-x Mn x O 3+d (LCM, x = 0, 0.3, 0.5, 0.7, and 1.0), with over-stoichiometric oxygen (d > 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 (e g ) of Co in LCM. Among these compounds, LaCo 0.5 Mn 0.5 O 3+d (LCM55) exhibited an excellent activity with e g = 1.27. The high interstitial oxygen ion diffusion rate (D O 2- = 1.58 ± 0.01 × 10 -13 cm 2 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.
|dc.title||Nanostructured Co-Mn containing perovskites for degradation of pollutants: Insight into the activity and stability|
|dcterms.source.title||Journal of Hazardous Materials|
|curtin.department||WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)|
|curtin.accessStatus||Fulltext not available|
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