Oxygen vacancy induced peroxymonosulfate activation by Mg-doped Fe₂O₃ composites for advanced oxidation of organic pollutants
Oxygen vacancy engineering has emerged as an effective approach to improve the performance of catalysts for peroxymonosulfate (PMS) activation. Herein, we report a facile precipitation method followed by calcination to synthesize cost-effective and environmentally friendly magnesium-doped hematite (...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/159692 |
| _version_ | 1826121007931326464 |
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| author | Guo, Sheng Liu, Mengdie You, Liming Cheng, Gang Li, Jun Zhou, Kun |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Guo, Sheng Liu, Mengdie You, Liming Cheng, Gang Li, Jun Zhou, Kun |
| author_sort | Guo, Sheng |
| collection | NTU |
| description | Oxygen vacancy engineering has emerged as an effective approach to improve the performance of catalysts for peroxymonosulfate (PMS) activation. Herein, we report a facile precipitation method followed by calcination to synthesize cost-effective and environmentally friendly magnesium-doped hematite (Mg/Fe2O3) composites. Multiple characterization results reveal that the incorporation of Mg can significantly increase the oxygen vacancies and specific surface area of 5%Mg/Fe2O3, leading to a significantly enhanced performance in degrading Rhodamine B (RhB) through PMS activation. In a typical reaction, almost complete RhB (10 mg/L) removal can be achieved by the activation of PMS (0.2 g/L) using 5%Mg/Fe2O3 (0.5 g/L). Moreover, the as-synthesized catalyst exhibits a broad pH working range (3.96-10.69), high stability, and recyclability. The effects of several parameters (e.g., catalyst amount, PMS dosage, solution pH and temperature, and coexisting inorganic anions) on the removal of RhB in the 5%Mg/Fe2O3/PMS system are investigated. A plausible PMS activation mechanism is proposed, and 1O2 and O2- are identified as the predominant reactive species in RhB degradation instead of SO4- and OH. This study provides new insights into the development of highly efficient iron-based catalysts and highlights their potential applications in environmental purification. |
| first_indexed | 2024-10-01T05:25:44Z |
| format | Journal Article |
| id | ntu-10356/159692 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:25:44Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1596922022-06-29T04:31:55Z Oxygen vacancy induced peroxymonosulfate activation by Mg-doped Fe₂O₃ composites for advanced oxidation of organic pollutants Guo, Sheng Liu, Mengdie You, Liming Cheng, Gang Li, Jun Zhou, Kun School of Mechanical and Aerospace Engineering Nanyang Environment and Water Research Institute Engineering::Environmental engineering Mg Doping Peroxymonosulfate Oxygen vacancy engineering has emerged as an effective approach to improve the performance of catalysts for peroxymonosulfate (PMS) activation. Herein, we report a facile precipitation method followed by calcination to synthesize cost-effective and environmentally friendly magnesium-doped hematite (Mg/Fe2O3) composites. Multiple characterization results reveal that the incorporation of Mg can significantly increase the oxygen vacancies and specific surface area of 5%Mg/Fe2O3, leading to a significantly enhanced performance in degrading Rhodamine B (RhB) through PMS activation. In a typical reaction, almost complete RhB (10 mg/L) removal can be achieved by the activation of PMS (0.2 g/L) using 5%Mg/Fe2O3 (0.5 g/L). Moreover, the as-synthesized catalyst exhibits a broad pH working range (3.96-10.69), high stability, and recyclability. The effects of several parameters (e.g., catalyst amount, PMS dosage, solution pH and temperature, and coexisting inorganic anions) on the removal of RhB in the 5%Mg/Fe2O3/PMS system are investigated. A plausible PMS activation mechanism is proposed, and 1O2 and O2- are identified as the predominant reactive species in RhB degradation instead of SO4- and OH. This study provides new insights into the development of highly efficient iron-based catalysts and highlights their potential applications in environmental purification. Nanyang Technological University This work received financial support from the National Natural Science Foundation of China (51604194), Science and Technology Project of Henan Province (32340099), Postgraduate Education Innovation Foundation of Wuhan Institute of Technology (CX2020290), China Scholarship Council (201808420137) and Nanyang Environment and Water Research Institute (Core Fund), Nanyang Technological University, Singapore. 2022-06-29T04:31:55Z 2022-06-29T04:31:55Z 2021 Journal Article Guo, S., Liu, M., You, L., Cheng, G., Li, J. & Zhou, K. (2021). Oxygen vacancy induced peroxymonosulfate activation by Mg-doped Fe₂O₃ composites for advanced oxidation of organic pollutants. Chemosphere, 279, 130482-. https://dx.doi.org/10.1016/j.chemosphere.2021.130482 0045-6535 https://hdl.handle.net/10356/159692 10.1016/j.chemosphere.2021.130482 33865164 2-s2.0-85104067273 279 130482 en Chemosphere © 2021 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering Mg Doping Peroxymonosulfate Guo, Sheng Liu, Mengdie You, Liming Cheng, Gang Li, Jun Zhou, Kun Oxygen vacancy induced peroxymonosulfate activation by Mg-doped Fe₂O₃ composites for advanced oxidation of organic pollutants |
| title | Oxygen vacancy induced peroxymonosulfate activation by Mg-doped Fe₂O₃ composites for advanced oxidation of organic pollutants |
| title_full | Oxygen vacancy induced peroxymonosulfate activation by Mg-doped Fe₂O₃ composites for advanced oxidation of organic pollutants |
| title_fullStr | Oxygen vacancy induced peroxymonosulfate activation by Mg-doped Fe₂O₃ composites for advanced oxidation of organic pollutants |
| title_full_unstemmed | Oxygen vacancy induced peroxymonosulfate activation by Mg-doped Fe₂O₃ composites for advanced oxidation of organic pollutants |
| title_short | Oxygen vacancy induced peroxymonosulfate activation by Mg-doped Fe₂O₃ composites for advanced oxidation of organic pollutants |
| title_sort | oxygen vacancy induced peroxymonosulfate activation by mg doped fe₂o₃ composites for advanced oxidation of organic pollutants |
| topic | Engineering::Environmental engineering Mg Doping Peroxymonosulfate |
| url | https://hdl.handle.net/10356/159692 |
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