Preparation and Catalytic Performance of Expanded Graphite for Oxidation of Organic Pollutant
| العنوان: | Preparation and Catalytic Performance of Expanded Graphite for Oxidation of Organic Pollutant |
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| المؤلفون: | Wen-Bin Su, Rui-Jia Lan, Ji-Tai Li |
| المصدر: | Catalysts, Vol 9, Iss 3, p 280 (2019) Catalysts Volume 9 Issue 3 |
| بيانات النشر: | MDPI AG, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | sodium peroxydisulfate, Inorganic chemistry, mechanism, chemistry.chemical_element, 02 engineering and technology, lcsh:Chemical technology, 010402 general chemistry, 01 natural sciences, Catalysis, lcsh:Chemistry, chemistry.chemical_compound, Adsorption, X-ray photoelectron spectroscopy, Peroxydisulfate, lcsh:TP1-1185, Graphite, Physical and Theoretical Chemistry, degradation, Aqueous solution, Chemistry, expanded graphite, 021001 nanoscience & nanotechnology, 0104 chemical sciences, lcsh:QD1-999, Degradation (geology), 0210 nano-technology, Carbon, acid red 97 |
| الوصف: | A classic carbon material&mdash expanded graphite (EG), was prepared and proposed for a new application as catalysts for activating peroxydisulfate (PDS). EG samples prepared at different expansion temperatures were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and other methods. It was observed that there existed a remarkable synergistic effect in the EG/PDS combined system to degrade Acid Red 97 (AR97). Unlike other carbon material catalysts, sp2 carbon structure may be the main active site in the catalytic reaction. The EG sample treated at 600 ° C demonstrated the best catalytic activity for the activation of PDS. Degradation efficiency of AR97 increased with raising PDS dosage and EG loadings. The pH of aqueous solution played an important role in degradation and adsorption, and near-neutrality was the optimal pH in this research. It was assumed that the radical pathway played a dominant role in AR97 degradation and that oxidation of AR97 occurred in the pores and interface layer on the external surface of EG by SO4· &minus and · OH, generated on or near the surface of EG. The radical oxidation mechanism was further confirmed by electron paramagnetic resonance spectroscopy. The EG sample could be regenerated by annealing, and the catalytic ability was almost fully recovered. |
| وصف الملف: | application/pdf |
| تدمد: | 2073-4344 |
| DOI: | 10.3390/catal9030280 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ca6386b7e98847a5e61e3ba7a76aa9b https://doi.org/10.3390/catal9030280 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....6ca6386b7e98847a5e61e3ba7a76aa9b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20734344 |
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| DOI: | 10.3390/catal9030280 |