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首页> 外文期刊>Nature >A HIGH-SILICA ZEOLITE WITH A 14-TETRAHEDRAL-ATOM PORE OPENING
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A HIGH-SILICA ZEOLITE WITH A 14-TETRAHEDRAL-ATOM PORE OPENING

机译：具有四面体原子孔的高硅沸石

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ZEOLITES (microporous aluminosilicates) and related molecular sieves have found wide application as catalysts, sorbents and ionexchange materials. New zeolites with large pores are much in demand(1-4), and have been sought for several decades(4-7). All known zeolites, both natural and synthetic, contain pores comprised of 12 or fewer tetrahedrally coordinated silicon or aluminium atoms (T-atoms), but several microporous aluminophosphates with wider pores are now known(2,8-12). The practical value of these large-pore phosphate-based materials is limited, however, by their poor thermal and hydrothermal stability. Here we report the synthesis of a high-silica zeolite with pores comprised of 14 T-atoms. Preliminary data indicate that this thermally stable large-pore material exhibits the kind of strong acidity that makes other zeolites useful catalysts. [References: 22]
机译：ZEOLITES（微孔铝硅酸盐）和相关的分子筛已被广泛用作催化剂，吸附剂和离子交换材料。具有大孔的新型沸石的需求量很大（1-4），并且已经被寻找了几十年（4-7）。所有已知的天然和合成沸石均包含由12个或更少的四面体配位的硅或铝原子（T原子）组成的孔，但是现在已知几种具有较宽孔的微孔铝磷酸盐（2,8-12）。但是，这些大孔磷酸盐基材料的实用价值受到其差的热稳定性和水热稳定性的限制。在这里，我们报道了由14个T原子组成的孔隙的高硅沸石的合成。初步数据表明，这种热稳定的大孔材料显示出强酸性，使其他沸石成为催化剂。 [参考：22]

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