✦ LIBER ✦

Synthesis and characterization of titanium-pillared montmorillonites

✍ Scribed by L.Khalfallah Boudali; A. Ghorbel; D. Tichit; B. Chiche; R. Dutartre; F. Figueras

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 836 KB
Volume: 2
Category: Article
ISSN: 0927-6513
DOI: 10.1016/0927-6513(93)e0068-r

No coin nor oath required. For personal study only.

✦ Synopsis

Titanium-pillared inter-layered clays (TiPILCs) were prepared by intercalating polymeric cationic species in clay layers. The intercalation was obtained by hydrolysis of TiCl, with HCl (TiPILC-Cl) and HISO, (TiPILC-S). The influence of the determinant parameters viz. the H+/Ti and Ti/clay ratios, was considered and experimental conditions leading to high specific surface areas and well defined structures of the pillared montmorillonites were determined. The structural properties of the resulting pillars suggest a different nature of the polymeric cationic species obtained by varying the acid. Smaller specific areas and stronger Bronsted acidic sites are observed on TiPILC-S. Similar sites as those described for SO;-Ti02 superacids are proposed. These results might contribute to the development of a new catalyst family.

📜 SIMILAR VOLUMES

Preparation and catalytic activity of ti

Preparation and catalytic activity of titanium pillared montmorillonite

✍ H.L. Del Castillo; P. Grange 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 649 KB

Thermally stable titanium pillared montmorillonite has been prepared by the intercalation of four different titanium alkoxides. X-ray diffraction, BET, chemical analysis, thermogravimetric analysis, differential thermal analysis, temperature-programmed desorption of ammonia and IR spectra of samples

Immobilization and characterization of c

Immobilization and characterization of copper chlorophthalocyanine on alumina-pillared montmorillonite

✍ Veda Ramaswamy; M.Sivarama Krishnan; A.V Ramaswamy 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 159 KB

Preparation and characterization of micr

Preparation and characterization of microporous SiO2–ZrO2 pillared montmorillonite

✍ Yang-Su Han; Shoji Yamanaka 📂 Article 📅 2006 🏛 Elsevier Science 🌐 English ⚖ 414 KB

SiO 2 -ZrO 2 pillared montmorillonite (SZM) was prepared by the reaction of Na-montmorillonite with colloidal silica-zirconia particles which were prepared by depositing zirconium hydroxy cations on silica particles. By pillaring with the colloidal particles, the basal spacing of montmorillonite was

ESR study of vanadium-doped alumina- and

ESR study of vanadium-doped alumina- and titania-pillared montmorillonites

✍ Krzysztof Bahranowski; Ewa M. Serwicka 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 569 KB

Montmorillonite-based porous clay hetero

Montmorillonite-based porous clay heterostructures (PCHs) intercalated with silica–titania pillars—synthesis and characterization

✍ Lucjan Chmielarz; Barbara Gil; Piotr Kuśtrowski; Zofia Piwowarska; Barbara Dudek 📂 Article 📅 2009 🏛 Elsevier Science 🌐 English ⚖ 1008 KB

Characterization of the microporosity of

Characterization of the microporosity of chromia- and titania-pillared montmorillonites differing in pillar density.: I. Adsorption of nitrogen

✍ Mikhail Sychev; Tatjana Shubina; Michal Rozwadowski; A.P.B. Sommen; V.H.J. De Be 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 396 KB

The microporosity of chromia-and titania-pillared clays differing in pillar density has been explored. Nitrogen adsorption data determined at very low relative pressures were used. These data were analyzed by means of the a s method and the BET, Langmuir, Dubinin-Radushkevich and Dubinin-Stoeckli ap