2005
DOI: 10.1016/s0167-2991(05)80230-7
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Synthesis and catalytic application of tantalum and silica pillared porous materials from layered silicate ilerite

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Cited by 9 publications
(3 citation statements)
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“…But it is mainly the results of new TEM observations on the persistence of structural defects that lead to the conclusion of their thermal stability, at least up to 850°C. The ATR-FTIR analyses provided results, especially an absorption band at 3680 cm À1 , very close to the absorption band of OH groups to 3730 cm À1 in bulk Ta 2 O 5 [35]. However, the absorption band was consistently observed on all samples crystallised in a stream of gas O 2 or H 2 O-O 2 and after each of the heat treatment of sample n°6.…”
Section: Thermal Stability Of Defectsmentioning
confidence: 51%
“…But it is mainly the results of new TEM observations on the persistence of structural defects that lead to the conclusion of their thermal stability, at least up to 850°C. The ATR-FTIR analyses provided results, especially an absorption band at 3680 cm À1 , very close to the absorption band of OH groups to 3730 cm À1 in bulk Ta 2 O 5 [35]. However, the absorption band was consistently observed on all samples crystallised in a stream of gas O 2 or H 2 O-O 2 and after each of the heat treatment of sample n°6.…”
Section: Thermal Stability Of Defectsmentioning
confidence: 51%
“…T h e l a y e r e d N a -o c t o s i l i c a t e ( i l e r i t e , Na 2 Si 8 0 17 •nH 2 O or Na 8 Si 32 O 64 (OH) 8 •nH 2 O) has a two-dimensional (2-D) oriented condensed structure (Borbely et al, 1991;Brenn et al, 2000;Mochizuki et al, 2005;Iozzi et al, 2009). This special layered structure has potential applications in ion-exchange (Ide et al, 2009;Royer et al, 2010;Supronowicz & Roessner, 2011;Takanori & Makoto 2012), catalysis (Kim et al, 2005;Ahn et al, 2008), intercalation of organic-molecules (Ishimaru et al, 2004;Kib et al, 2010), and organic-inorganic hybrid materials (Ishii & Shinohara, 2005;Ishii et al, 2006;Borowski et al, 2008). Another potential application of layered Na-octosilicates is their use as a host material to enclose semiconductor nanoparticles in the interlayer space in order to improve the chemical stability and modify the optical properties of semiconductor particles.…”
mentioning
confidence: 99%
“…Através desse procedimento é possível a obtenção de um sólido com estrutura tridimensional e, portanto, maior área superficial que o material precursor. Os silicatos lamelares são geralmente pilarizados após a expansão do seu espaço interlamelar utilizando agentes surfactantes ou aminas, etapa seguida da reação com um agente pilarizante, que leva ao crescimento de pilares entre lamelas adjacentes e, por fim, de uma calcinação para eliminação dos resíduos orgânicos dessas reações [34,[60][61][62][63][64][65][66][67][68]. Muitos silicatos lamelares têm sido estudados como precursores de materiais pilarizados, a kanemita [69], a keniaíta [70], a magadiita [68,71,72] e o Na-RUB-18 [34,62].…”
Section: Estrutura E Propriedadesunclassified