New silica-pillared material prepared from the layered silicic acid of ilerite

Catalytic performance of metal oxide-loaded Ta-ilerite for vapor phase Beckmann rearrangement of cyclohexanone oxime

“…The XRD patterns of Na-ilerite and H-ilerite ( Fig. 2f and g) agree well with those reported elsewhere [21] and no impurity peak is observed. However, the XRD pattern of H-ilerite is significantly changed by Ta pillaring.…”

“…2a-c, Ta-ilerites exhibit the XRD patterns of amorphous-like materials in the wide-angle region (2θ = 10-40 • ), but they have a new peak in the small-angle region (2θ < 5 • ). The peak broadening in the wide-angle region comes from the decrease of crystallinity due to layer displacement along the a and b axes [21]. In the small-angle reflections, the d 0 0 1 peaks of Ta-ilerites correspond to the basal spacings of 4.49-4.33 nm (Table 1), which are much larger than 0.75 nm of H-ilerite, suggesting the formation of pillared structure between layers of ilerite.…”

“…Layered silicates such as kenyaite (Na 2 Si 20 O 41 ·11H 2 O), magadiite (Na 2 Si 14 O 29 ·11H 2 O) and ilerite (Na 2 Si 8 O 17 ·xH 2 O) are known to be useful hosts for preparing pillared materials [20][21][22]. Although the layered silicate itself is thermally unstable and has low surface area, the layered silicate pillared with inorganic metal oxide has pore structure, high thermal stability and high surface area like zeolites.…”

Hybrid and biohybrid silicate based materials: molecular vs. block-assembling bottom–up processes

“…51 This is a kind of bottom-up process in a nanoscopic environment (interlayer space) and the approach has been applied to other types of layered silicates as well as to other layered materials such as transition-metal oxides. 52 54,55 The above-mentioned case is another beautiful example of molecular intercalation and subsequent self-assembly of the intercalated surfactant following a bottom-up process that occurs within the interlayer space of silica-based solids of 2D structural arrangement.…”

A Comparison of Supercritical Carbon Dioxide and Organic Solvents for the Intercalation of 4-Phenylazoaniline into a Pillared Clay Mineral

“…The synthesis of composites resulting from the incorporation of functional molecules into porous materials may also be improved by application of SCFs. Such applications have attracted widespread interest over the past 10 years in the synthesis of novel composites such as sensors, memory media, and catalysts (12)(13)(14)(15), broadening the diversity of microporous and mesoporous materials such as zeolites (16), pillared layered materials (17)(18)(19)(20), , and MCM-41 (22,23). Regarding the superiority of SCFs for incorporation of functional molecules into porous materials, Domingo et al reported the adsorption of benzoic acid, salicylic acid, acetylsalicylic acid, and their mixture into alumina, silica gel, and VPI-5 from saturated supercritical carbon dioxide (24,25).…”