Розкладання пероксиду водню нанокомпозитами каолін - нанорозмірний оксид церію
A series of kaolin nanomaterials decorated with CeO2 was synthesized by reaction of cerium nitrate deposition in an aqueous medium without stabilizers at room temperature. Amount of deposited cerium oxide in nanomaterial vary from 2,76 till 7,37 %. The size of CeO2 nanocrystals vary fro...
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| Date: | 2015 |
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| Main Authors: | , , , , |
| Format: | Article |
| Language: | Ukrainian |
| Published: |
Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine
2015
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| Online Access: | https://surfacezbir.com.ua/index.php/surface/article/view/590 |
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| Journal Title: | Surface |
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Surface| Summary: | A series of kaolin nanomaterials decorated with CeO2 was synthesized by reaction of cerium nitrate deposition in an aqueous medium without stabilizers at room temperature. Amount of deposited cerium oxide in nanomaterial vary from 2,76 till 7,37 %. The size of CeO2 nanocrystals vary from 5,6 till 10,4 nm. IUVSCe4+/IUVSCe3+ ratio in nanocomposites were evaluated by UV diffuse reflection spectroscopy. The catalytic activity of the synthesized materials, kaolin, and pure cerium nanooxide was investigated in a reaction of H2O2 decomposition in pH range 8.5 – 10.5 and compared with the enzyme catalase activity. It was shown that the activity of ceria oxide decorated catalysts correlates with modifier content, nanooxide particle dispersion and ceria surface defects, evaluated as IUVSCe4+/IUVSCe3+ ratio. The dependence of the samples activity on pH is extreme with maximum at pH 9,5–10. |
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