Abstract
A novel immobilized solid acid coating on Q235 carbon steel was successfully prepared via plasma electrolytic oxidation. Sulfate functionalized Fe 3 O 4 /FeAl 2 O 4 was confirmed by XRD, TEM and XPS analysis and surface acidic property was verified by NH 3 -TPD measurement. Fenton-like degradation performance was evaluated by employing phenol as target pollutant. Fast phenol degradation under the wide range of pH (pH 6–9) was accomplished within only 11 min. Without sulfate functionalization, phenol could hardly be degraded by Fenton-like oxidation which meant that after sulfate functionalization the existence of acidic microenvironment on the catalyst surface not only provided an optimal circumstance for enhanced Fenton-like reaction, but also avoided adjusting pH of the treated wastewater. A reasonable Fenton-like degradation mechanism was proposed. This paper offered a novel design thought for synthesizing excellent Fenton-like coating catalyst under circumneutral pH.
| Original language | English |
|---|---|
| Pages (from-to) | 358-366 |
| Number of pages | 9 |
| Journal | Applied Surface Science |
| Volume | 409 |
| DOIs | |
| State | Published - 1 Jul 2017 |
| Externally published | Yes |
Keywords
- Coating
- Degradation
- Fenton-like
- Phenol
- Plasma electrolytic oxidation
- Solid acid
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