Adsorptive and Photocatalytic Removal of Phenol by Layered Niobates Organically Modified Through Intercalation and Silylation
| Autor: | Jun-ichi Haga, Sachika Hashimoto, Teruyuki Nakato, Shosuke Kiba |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Materials science
Spectrophotometry Infrared Vapor Pressure Potassium Compounds Niobium Intercalation (chemistry) Inorganic chemistry Biomedical Engineering Octadecyltrimethoxysilane Bioengineering chemistry.chemical_compound Adsorption Phenols X-Ray Diffraction Nanotechnology Phenol General Materials Science Benzene Oxides General Chemistry Silanes Photochemical Processes Condensed Matter Physics Decomposition chemistry Covalent bond Photocatalysis Hydrophobic and Hydrophilic Interactions |
| Zdroj: | Journal of Nanoscience and Nanotechnology. 10:8341-8348 |
| ISSN: | 1533-4880 |
| DOI: | 10.1166/jnn.2010.2665 |
| Popis: | Layered hexaniobate K4Nb6O17 was modified with dodecylammonium ions and octadecyltrimethoxysilane molecules, which were held in the interlayer spaces by electrostatic interactions and covalent attachment to the layers, respectively. Interlayer spacing of the niobate was expanded by incorporation of the bulky organic species. Vapor adsorption isotherms of benzene and water indicated hydrophobic interlayer microenvironments of the organically modified niobates. Both of the modified niobates fairly adsorbed phenol dissolved in water. The photocatalytic activity of hexaniobate allowed the organically modified materials to photocatalytically decompose phenol upon UV irradiation. Decomposition time courses and quantitative analysis of phenol present in the system indicated that the phenol molecules adsorbed on the niobates were preferentially degraded. XRD and IR analyses of the modified niobates indicated that the silylated niobate was more durable than the ion-exchanged sample; the former kept the structure during the photocatalytic process while the latter was partly collapsed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|