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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Swelling and pillaring of the layered precursor IPC-1P: tiny details determine everything
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Swelling and pillaring of the layered precursor IPC-1P: tiny details determine everything

机译：分层前体IPC-1P的膨胀和起伏：微小的细节决定一切

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The influence of swelling (i.e. the size of tetraalkylammonium surfactant molecule, the presence of tetrapropylammonium hydroxide (TPAOH), pH) and pillaring (i.e. the ratio between the swollen precursor IPC-1P and tetraethyl orthosilicate) conditions on the structure and textural properties of the resulting materials was studied in detail for IPC-1P, which is the layered precursor of zeolite PCR. The swelling of IPC-1P proceeds efficiently under basic conditions both in mixed C_nH_(2n+1)N(CH_3)_3Cl/TPAOH systems and in C_nH_(2n+1)N(CH_3)_3OH (n = 8, 10, 12, 14, 16, 18) solutions at pH = 13–14. The intercalation of C_nH_(2n+1)N+(CH_3)_3 in IPC-1P resulted in the formation of expanded materials with interlayer distances growing with increasing length of the alkyl chain in C_nH_(2n+1)N(CH_3)_3~+: 1.59–1.86 (n = 8) < 1.89–2.11 (10) < 2.05–2.26 (12) = 2.08–2.26 (14) < 2.37–2.43 (16) < 2.57–2.71 (18) ?. IPC-2 zeolite was formed during calcination of IPC-1P samples swollen in C_nH_(2n+1)N(CH_3)_3OH solution, while PCR zeolite can be obtained by calcination of IPC-1P treated with either C_nH_(2n+1)N(CH_3)_3Cl/TPAOH or C_nH_(2n+1)N(CH_3)_3Cl. The pillaring of IPC-1P samples swollen with C_nH_(2n+1)N(CH_3)_3OH provided mesoporous materials with narrow pore size distribution in the range 2.5–3.5 nm. Pillared materials derived from the samples swollen in the presence of TPAOH were characterized by a broader pore size distribution. The optimal TEOS/IPC-1PSW ratio being sufficient for the formation of well-ordered pillared derivatives characterized by improved textural properties (S_(BET) = 878 m~2 g~(?1), V_(total) = 0.599 cm~3 g~(?1)) was found to be 1 : 1.5.
机译：溶胀（即四烷基铵表面活性剂分子的大小，氢氧化四丙基铵（TPAOH）的存在，pH）和柱化（即溶胀的前体IPC-1P与原硅酸四乙酯之间的比率）对结构和结构的影响仔细研究了所得材料的IPC-1P，它是沸石PCR的层状前体。 IPC-1P的溶胀在混合C_nH_（2n + 1）N（CH_3）_3Cl / TPAOH系统和C_nH_（2n + 1）N（CH_3）_3OH（n = 8、10、12， 14、16、18）pH = 13-14的溶液。在IPC-1P中插入C_nH_（2n + 1）N +（CH_3）_3导致形成膨胀材料，层间距离随着C_nH_（2n + 1）N（CH_3）_3〜+中烷基链长度的增加而增加：1.59–1.86（n = 8）<1.89–2.11（10）<2.05–2.26（12）= 2.08–2.26（14）<2.37–2.43（16）<2.57–2.71（18）？在C_nH_（2n + 1）N（CH_3）_3OH溶液中溶胀的IPC-1P样品煅烧过程中形成了IPC-2沸石，而通过C_nH_（2n + 1）N处理的IPC-1P煅烧可以得到PCR沸石（CH_3）_3Cl / TPAOH或C_nH_（2n + 1）N（CH_3）_3Cl。用C_nH_（2n + 1）N（CH_3）_3OH溶胀的IPC-1P样品的柱基提供了介孔材料，其孔径分布范围在2.5-3.5 nm之间。在TPAOH存在下溶胀的样品中得到的柱状材料的特征是孔径分布较宽。最佳TEOS / IPC-1PSW比足以形成具有改善的织构特性（S_（BET）= 878 m〜2 g〜（？1），V_（total）= 0.599 cm〜3发现g〜（？1））为1：1.5。

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