| dc.contributor.author | Köksal, E. | |
| dc.contributor.author | Afşin, B. | |
| dc.contributor.author | Tabak, Ahmet | |
| dc.contributor.author | Çağlar, B. | |
| dc.date.accessioned | 2020-12-19T20:11:09Z | |
| dc.date.available | 2020-12-19T20:11:09Z | |
| dc.date.issued | 2011 | |
| dc.identifier.citation | Köksal, E., Afşin, B., Tabak, A. & Çağlar, B. (2011). Structural characterization of aniline-bentonite composite by FTIR, DTA/TG, and PXRD analyses and BET measurement. Spectroscopy Letters, 44(2), 77-82. https://doi.org/10.1080/00387010903555953 | en_US |
| dc.identifier.issn | 0038-7010 | |
| dc.identifier.uri | https://doi.org/10.1080/00387010903555953 | |
| dc.identifier.uri | https://hdl.handle.net/11436/3669 | |
| dc.description.abstract | The aniline species incorporated into the acid-activated bentonite matrices leads to the decay of the skeletal stretches centered at 1041 cm-1 and the rise of new features in the phenyl ring frequency region, 1700-1400 cm-1, demonstrates clearly the influence of the acid activation on the Lewis sites necessary for coordination of aniline to bentonite. The exothermic DTA features at 507, 684, and 725°C indicate the release of both the clusters and the decomposed fragments of the aniline-clay composite, and the highly stable carbonaceous residue, respectively. The basal difference by ?1.0 nm and the much smaller surface area (33.8 m2/g) than that of the nonintercalated bentonite (129.2 m2/g) prove the presence of the tilted aniline species between the interlamellar grooves of the bentonite framework. Copyright © Taylor & Francis Group, LLC. | en_US |
| dc.description.sponsorship | F238 | en_US |
| dc.description.sponsorship | The influence of acid activation on the intercalation of aniline species by a bentonite clay was verified by FTIR spectroscopy, thermal analysis (DTA/TG), Powder X-ray Diffraction (PXRD), and surface area measurement techniques. Characteristic vibrational features of the composite were supported by the diffraction patterns and the thermal analysis data. Raw bentonite clay showed highly crystalline layers and quartz impurities. This material was modified by acid activation, resulting in a striking increase (by ~4-fold) in the surface area. Conversely, the incorporation of aniline species into the interlayer protonic centers of the AAB lattice led to a considerable reduction in the surface area. The basal difference by ~1.0 nm observed on An/AAB composite formation, which was corroborated by characteristic ring and N-H vibrational stretches, revealed the presence of host-guest interactions of hydrogen-bonded nature between the interlamellar matrices of AAB and the pi-stacking of aniline clusters where the phenyl groups are slightly canted. The DTA analysis confirmed the loss of anilinium clusters (a mass loss by 1.2%) over the temperature range 271–388°C, whereas the chemically fixed aniline entities (a much higher mass loss: 8.0%) remain stable up to 507°C. | en_US |
| dc.description.sponsorship | The authors are grateful to the Research Foundation of Ondokuz Mayis University for the financial support of this work under Project F238. We also thank Professor Ugur Cevik of Karadeniz Technical University for performing the chemical analysis of the activated clay sample. | en_US |
| dc.language.iso | eng | en_US |
| dc.publisher | Taylor & Francis | en_US |
| dc.rights | info:eu-repo/semantics/closedAccess | en_US |
| dc.subject | Anline species | en_US |
| dc.subject | Bentonite | en_US |
| dc.subject | Intercalation | en_US |
| dc.subject | Surface properties | en_US |
| dc.subject | Thermal analysis | en_US |
| dc.title | Structural characterization of aniline-bentonite composite by FTIR, DTA/TG, and PXRD analyses and BET measurement | en_US |
| dc.type | article | en_US |
| dc.contributor.department | RTEÜ, Fen - Edebiyat Fakültesi, Kimya Bölümü | en_US |
| dc.contributor.institutionauthor | Tabak, Ahmet | |
| dc.identifier.doi | 10.1080/00387010903555953 | |
| dc.identifier.volume | 44 | en_US |
| dc.identifier.issue | 2 | en_US |
| dc.identifier.startpage | 77 | en_US |
| dc.identifier.endpage | 82 | en_US |
| dc.relation.journal | Spectroscopy Letters | en_US |
| dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |
