2016
DOI: 10.1039/c6cp01950a
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Structural analysis of IPC zeolites and related materials using positron annihilation spectroscopy and high-resolution argon adsorption

Abstract: The advanced investigation of pore networks in isoreticular zeolites and mesoporous materials related to the IPC family was performed using high-resolution argon adsorption experiments coupled with the development of a state-of-the-art non-local density functional theory approach. The optimization of a kernel for model sorption isotherms for materials possessing the same layer structure, differing only in the interlayer connectivity (e.g. oxygen bridges, single- or double-four-ring building units, mesoscale pi… Show more

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Cited by 21 publications
(21 citation statements)
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“…The mesopores occurring in hierarchical zeolites, as well as their connectivity with the zeolitic micropores, have been visualized using transmission electron microscopy, 96,145,146 as well as by other techniques, such as hyperpolarized 129 Xe-NMR, 147 positron annihilation 148 and electron tomography. 149 A variety of 2D and 3D microscopic techniques have been demonstrated to probe the pore structure of hierarchical zeolites.…”
Section: Properties Of Hierarchical Zeolitesmentioning
confidence: 99%
“…The mesopores occurring in hierarchical zeolites, as well as their connectivity with the zeolitic micropores, have been visualized using transmission electron microscopy, 96,145,146 as well as by other techniques, such as hyperpolarized 129 Xe-NMR, 147 positron annihilation 148 and electron tomography. 149 A variety of 2D and 3D microscopic techniques have been demonstrated to probe the pore structure of hierarchical zeolites.…”
Section: Properties Of Hierarchical Zeolitesmentioning
confidence: 99%
“…In addition, UTL‐AB‐LS was converted into PCR zeolite with macropores through interlayer condensation by a method similar to that reported previously . Several zeolites can be converted into layered silicates by acidic treatment, and these kind of materials have expanded the variety of zeolite‐related materials, and their structural analyses have been developed . Therefore, the method in this study will be applicable to the synthesis of other layered silicates with macropores.…”
Section: Introductionmentioning
confidence: 85%
“…First, the UTL-type zeolite with macropores was synthesized hydrothermally in the presence of al arge amount of acetylene black (UTL-AB-as). [15] Therefore, the methodi nt his study will be applicable to the synthesis of other layered silicates with macropores. [13] Subsequentc alcination removed the templates (UTL-AB-cal).…”
Section: Introductionmentioning
confidence: 99%
“…In crystalline microporous solids like zeolites, MOFs, or COFs, the observation of short‐lived o Ps species (τ ≈ 1–20 ns) is increasingly recognized as a promising means to gain structural insight into the crystal size, pore topology, and presence of defects. [38a,40‐49] This is of particular interest, since the nanostructuring of these materials, for example, to improve transport properties or expand the functionality in catalytic and other applications, often increases the complexity of structure determination due to the reduced size and/or order of crystalline domains. [9b] The sensitivity of PALS to the pore size was supported by an early comparison of different porous materials that demonstrated a general trend between the o Ps lifetime and the average pore diameter .…”
Section: Applications Of Pasmentioning
confidence: 99%
“…However, at that time it was not possible to assign the data collected to structural properties of the materials confidently. More recently PALS was used as a complementary technique for the structural analysis of IPC zeolites obtained by the assembly–disassembly–organization–reassembly (ADOR) approach ( Figure a) . The technique could clearly discriminate pillared mesoporous samples (IPC1A and IPC1B) from purely microporous zeolites (UTL, IPC‐2, and IPC‐4).…”
Section: Applications Of Pasmentioning
confidence: 99%