Surface Acidities of Bentonite, Sepiolite, and Synthetic Silica-Aluminas

The surface acidities of Bentonite, Sepiolite, and Silica-Aluminas were determined by Hammett indicators, amine titrations, and of pyridine adsorption-IR spectroscopy. The quantitative estimation of surface acidities of silica-aluminas and their natures as Brønsted and Lewis acid sites were evaluate...

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Autores principales:	Mehmet Kadir YURDAKOÇ, Hasibe BÖLÜK, Aylin ALTINIŞIK TAĞAÇ
Formato:	article
Lenguaje:	EN
Publicado:	Turkish Chemical Society 2021
Materias:	surface acidity hammett indicators amine titration pyridine adsorption ftir spectroscopy Chemistry QD1-999
Acceso en línea:	https://doi.org/10.18596/jotcsa.962665 https://doaj.org/article/4f882ce30d17431dbe5fea600100cc50
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spelling	oai:doaj.org-article:4f882ce30d17431dbe5fea600100cc502021-11-20T09:52:25Z Surface Acidities of Bentonite, Sepiolite, and Synthetic Silica-Aluminas https://doi.org/10.18596/jotcsa.9626652149-0120https://doaj.org/article/4f882ce30d17431dbe5fea600100cc502021-11-01T00:00:00Zhttps://dergipark.org.tr/tr/pub/jotcsa/issue/64621/962665https://doaj.org/toc/2149-0120The surface acidities of Bentonite, Sepiolite, and Silica-Aluminas were determined by Hammett indicators, amine titrations, and of pyridine adsorption-IR spectroscopy. The quantitative estimation of surface acidities of silica-aluminas and their natures as Brønsted and Lewis acid sites were evaluated. Lewis and total surface acidity values of sepiolite were higher than bentonite, 0.53 and 2.22 mmole g-1, respectively. Surface acidity values of sepiolite and bentonite were much lower than Siral compounds. Among the Siral compounds, Siral 30 was found to be more effective in terms of acidity. All samples have both Lewis and Brønsted acid centers in which the Lewis sites predominated. IR spectroscopy with pyridine as a probe molecule was still very useful for the estimation of the surface acidities of the silica-alumina and also aluminosilicate structures such as clays and clay minerals.Mehmet Kadir YURDAKOÇHasibe BÖLÜKAylin ALTINIŞIK TAĞAÇTurkish Chemical Societyarticlesurface acidityhammett indicatorsamine titrationpyridine adsorptionftir spectroscopyChemistryQD1-999ENJournal of the Turkish Chemical Society, Section A: Chemistry, Vol 8, Iss 4, Pp 1153 -1164 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	surface acidity hammett indicators amine titration pyridine adsorption ftir spectroscopy Chemistry QD1-999
spellingShingle	surface acidity hammett indicators amine titration pyridine adsorption ftir spectroscopy Chemistry QD1-999 Mehmet Kadir YURDAKOÇ Hasibe BÖLÜK Aylin ALTINIŞIK TAĞAÇ Surface Acidities of Bentonite, Sepiolite, and Synthetic Silica-Aluminas
description	The surface acidities of Bentonite, Sepiolite, and Silica-Aluminas were determined by Hammett indicators, amine titrations, and of pyridine adsorption-IR spectroscopy. The quantitative estimation of surface acidities of silica-aluminas and their natures as Brønsted and Lewis acid sites were evaluated. Lewis and total surface acidity values of sepiolite were higher than bentonite, 0.53 and 2.22 mmole g-1, respectively. Surface acidity values of sepiolite and bentonite were much lower than Siral compounds. Among the Siral compounds, Siral 30 was found to be more effective in terms of acidity. All samples have both Lewis and Brønsted acid centers in which the Lewis sites predominated. IR spectroscopy with pyridine as a probe molecule was still very useful for the estimation of the surface acidities of the silica-alumina and also aluminosilicate structures such as clays and clay minerals.
format	article
author	Mehmet Kadir YURDAKOÇ Hasibe BÖLÜK Aylin ALTINIŞIK TAĞAÇ
author_facet	Mehmet Kadir YURDAKOÇ Hasibe BÖLÜK Aylin ALTINIŞIK TAĞAÇ
author_sort	Mehmet Kadir YURDAKOÇ
title	Surface Acidities of Bentonite, Sepiolite, and Synthetic Silica-Aluminas
title_short	Surface Acidities of Bentonite, Sepiolite, and Synthetic Silica-Aluminas
title_full	Surface Acidities of Bentonite, Sepiolite, and Synthetic Silica-Aluminas
title_fullStr	Surface Acidities of Bentonite, Sepiolite, and Synthetic Silica-Aluminas
title_full_unstemmed	Surface Acidities of Bentonite, Sepiolite, and Synthetic Silica-Aluminas
title_sort	surface acidities of bentonite, sepiolite, and synthetic silica-aluminas
publisher	Turkish Chemical Society
publishDate	2021
url	https://doi.org/10.18596/jotcsa.962665 https://doaj.org/article/4f882ce30d17431dbe5fea600100cc50
work_keys_str_mv	AT mehmetkadiryurdakoc surfaceaciditiesofbentonitesepioliteandsyntheticsilicaaluminas AT hasibeboluk surfaceaciditiesofbentonitesepioliteandsyntheticsilicaaluminas AT aylinaltinisiktagac surfaceaciditiesofbentonitesepioliteandsyntheticsilicaaluminas
_version_	1718419422520016896

Surface Acidities of Bentonite, Sepiolite, and Synthetic Silica-Aluminas

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