Novel insights on magadiite disaggregation: a multitechnique study on thermal stability

Autor(es)

de Souza e Silva, Juliana Martins ^{[1, 2, 3]} ; Paul, Geo ^{[1, 2]} ; Bendall, James ^[4] ; Bisio, Chiara ^{[5, 1, 2]} ; Marchese, Leonardo ^{[1, 2]} ; Pastore, Heloise O. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Piemonte Orientale, Dipartimento Sci & Innovaz Tecnol, I-15121 Alessandria - Italy

^[2] Univ Piemonte Orientale, Ctr NanoSiSTeMI, I-15121 Alessandria - Italy

^[3] Univ Estadual Campinas, Inst Quim, BR-13083861 Campinas, SP - Brazil

^[4] Univ Cambridge, Ctr Neurosci, Cambridge CB3 0FF - England

^[5] ISTM CNR Ist Sci & Tecnol Mol, Milan - Italy

• Tipo de documento: Artigo Científico
• Fonte: Physical Chemistry Chemical Physics; v. 15, n. 32, p. 13434-13445, 2013.
• Citações Web of Science: 7

Resumo

Disaggregated magadiite was obtained through ion-exchange in acidic media from magadiite intercalated in the synthesis with cetyltrimethylamonium cations. The combination of Soxhlet extraction and ultrasound during the procedure resulted in different morphology and different properties when compared with the pristine material, as observed by SEM. Thermal and surface properties studies performed by VT-XRD, TG, VT-FTIR, HETCOR SS-NMR, and N-2 physisorption show that disaggregated magadiite presents a basal space of 1.35 nm and that {[}SiO4] entities of adjacent magadiite silicate layers connect during ion-exchange under ultrasound. Despite these bonding events, the surface area increased from 20-26 m(2) g(-1) in CTA-magadiite to 55-72 m(2) g(-1) in disaggregated magadiite. (AU)

• Processo FAPESP: 08/00132-6 - Peneiras moleculares micro e mesoporosas e materiais lamelares III
• Beneficiário: Heloise de Oliveira Pastore
• Modalidade de apoio: Auxílio à Pesquisa - Regular