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Enhanced Degradation of Rhodamine B through Peroxymonosulfate Activated by a Metal Oxide/Carbon Nitride Composite
| Content Provider | MDPI |
|---|---|
| Author | Mo, Yuanmin Xu, Wei Zhang, Xiaoping Zhou, Shaoqi |
| Copyright Year | 2022 |
| Description | The development of high catalytic performance heterogeneous catalysts such as peroxymonosulfate (PMS) activators is important for the practical remediation of organic pollution caused by Rhodamine B (RhB). An economical and facile synthesized composite of copper–magnesium oxide and carbon nitride $(CM/g-C_{3}N_{4}$) was prepared by the sol-gel/high-temperature pyrolysis method to activate PMS for RhB degradation. $CM/g-C_{3}N_{4}$ exhibited a splendid structure for PMS activation, and the aggregation of copper–magnesium oxide was decreased when it was combined with carbon nitride. The introduction of magnesium oxide and carbon nitride increased the specific surface area and pore volume of $CM/g-C_{3}N_{4}$, providing more reaction sites. The low usage of $CM/g-C_{3}N_{4}$ (0.3 g/L) and PMS (1.0 mM) could rapidly degrade 99.88% of 10 mg/L RhB, and the RhB removal efficiency maintained 99.30% after five cycles, showing the superior catalytic performance and reusability of $CM/g-C_{3}N_{4}$. The synergistic effect of copper and $g-C_{3}N_{4}$ improved the PMS activation. According to the analyses of EPR and quenching experiments, SO_{4}$^{•−}$,$ ^{•}$OH and O_{2}$^{•−}$ radicals and$ $^{1}$O_{2}$ were generated in the activation of PMS, of which SO_{4}$^{•−}$ and$ $^{1}$O_{2}$ were important for RhB removal. The toxicity of RhB was alleviated after being degraded by the $CM/g-C_{3}N_{4}$/PMS system. This study provides an efficient and promising strategy for removing dyes in water due to the hybrid reaction pathways in the $CM/g-C_{3}N_{4}$/PMS system. |
| Starting Page | 2054 |
| e-ISSN | 20734441 |
| DOI | 10.3390/w14132054 |
| Journal | Water |
| Issue Number | 13 |
| Volume Number | 14 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-06-27 |
| Access Restriction | Open |
| Subject Keyword | Water Environmental Engineering Rhb Degradation Heterogeneous Catalyst Copper–magnesium Oxide/carbon Nitride Composite Pms Activation |
| Content Type | Text |
| Resource Type | Article |
