The structural stability of AlPO4-5 zeolite under pressure: Effect of the pressure transmission medium

Lv, Hang; Yao, Mingguang; Li, Quanjun; Liu, Ran; Liao, Bo; Lu, Shuangchen; Jiang, Linhai; Cui, Wen; Liu, Zhaodong; Liu, Jing; Chen, Zhiqiang; Zou, Bo; Cui, Tian; Liu, Bingbing

doi:10.1063/1.4726222

Cited by 14 publications

(12 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Preliminary studies in our group have suggested that the AFI structure is distorted in the pressure range 4.8 GPa to 15.9 GPa. At above 15.9 GPa, all diffraction peaks disappeared, suggesting that the AFI crystals were seriously distorted 23 . The inset optical image in Fig.…”

Section: Resultsmentioning

confidence: 99%

Insertion of N2 into the Channels of AFI Zeolite under High Pressure

Yao

et al. 2015

Sci Rep

Self Cite

View full text Add to dashboard Cite

We present an experimental study of a new hybrid material where nitrogen is encapsulated in the channels of porous zeolite AlPO4-5 (AFI) single crystals by a high-pressure method. The high-pressure behavior of nitrogen confined inside the AFI nano-channels is then investigated by Raman spectroscopy up to 44 GPa. Under pressure, the Raman modes of confined nitrogen show behaviors different from those of the bulk nitrogen. After the return to atmospheric pressure, it is demonstrated that non-gaseous nitrogen can be effectively stabilized by being confined inside the intact AFI sample. This result provides new insight into nitrogen capture and storage technologies.

show abstract

Section: Resultsmentioning

confidence: 99%

Insertion of N2 into the Channels of AFI Zeolite under High Pressure

Yao

et al. 2015

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…The recorded diffraction patterns are shown in Figure S7 and compared with that of our published data on empty AFI and N 2 -filled AFI. 23 It is clear that the framework stability of the hosting AFI filled with iodine is much higher than that of empty AFI. This is due to the support of the filled species to the AFI channels, similar to that observed in N 2 @AFI.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…High pressure serves as a powerful tuning parameter that has been used to tune the intermolecular interaction and structure of bulk materials. − In the confined environment, the configuration of the material is expected to be modified not only by the applied pressure but also by the evolution of the confinement volume of the host matrix . The transformations of the host matrix under pressure have been studied during the past years.…”

Section: Introductionmentioning

confidence: 99%

Pressure-Driven Topological Transformations of Iodine Confined in One-Dimensional Channels

et al. 2013

Self Cite

View full text Add to dashboard Cite

The behavior of molecules and molecular chains confined in 1D nanochannels imposed by external interactions is a problem of fundamental interest. Here, we report structural manipulation of iodine confined inside zeolite (AFI) nanochannels by the application of high pressure. Structural transformations of the confined iodine under pressure have been unambiguously identified by polarized Raman spectroscopy combined with theoretical simulation. The length of the iodine chains and the orientation and intermolecular interaction of the confined iodine have been tuned at the molecular level by applied pressure. Almost all the confined iodine can be tuned into an axially oriented state upon compression, favoring the formation of long chains. The long iodine chains can be preserved to ambient pressure when released from intermediate pressures. ■ INTRODUCTIONStudies of the control and manipulation of atoms/molecules and their assemblies generate remarkable new insights into how physical and chemical systems function. They permit direct observation of molecular behavior that can be obscured by ensemble averaging and enables the study of important problems ranging from fundamental physics to the design of nanoscale electro-optical devices. In particular, much effort has been focused on the control of atomic/molecular chains due to their potential application as quantum wires. 1−9 By using simultaneous STM and TEM (transmission electron microscopy), gold nanowires composed of several atomic chains have been fabricated and show quantum conductance behavior. 2 Later, thinner nanowires have been fabricated in high vacuum with an electron beam thinning technique but the stability becomes lower with decreasing size and the length is still limited to a few nanometers (<6 nm). 3 On the other hand, filling materials into one-dimensional channels has been shown to be an efficient way to prepare atomic/molecular chains stable at ambient condition. 9−13 However, the atomic/molecular chains obtained usually show a mixture of different arrangements or have random orientations and are mixed with individual atoms/molecules in the channels due to size mismatch between the host channel and the filled species or because of inhomogeneous filling. 8−14 A typical example is that filling iodine into single wall carbon nanotubes (SWNTs) yields either helicoidal chains, polyiodides, discrete individual molecules, or new crystalline structures of iodine in the nanotube channels, depending on the tube diameter. 14−16 To obtain chains in a particular desired structural arrangement requires further manipulation. 17 For this purpose, understanding the transformation dynamics of the confined iodine imposed by external interactions becomes very important.High pressure serves as a powerful tuning parameter that has been used to tune the intermolecular interaction and structure of bulk materials. 18−23 In the confined environment, the configuration of the material is expected to be modified not only by the applied pressure but also by the evolution of the co...

show abstract

“…This can provide important information on the maximum possible filling of these porous materials. Pressure-induced hydration and superhydration have been observed for a number of zeolites − and also for aluminophosphates. , Many other guest atoms and molecules can also be inserted at high pressure, such as simple molecules (H 2 O, N 2 , Br 2 , I 2 , CO, CO 2 , C 2 H 4 , C 2 H 2 , (CH 2 OH) 2 , NH 3 BH 3 , ...), − rare gases (He, Ar, and Xe). ,− and metals (K, In, Hg, ...). , Guest insertion strongly modifies the phase stability and the mechanical properties of filled as compared to empty-pore zeolite. Pressure-induced guest insertion of H 2 O has been proposed for applications in the absorption of mechanical energy as molecular springs and shock absorbers .…”

Section: Introductionmentioning

confidence: 99%

Saturation of the Siliceous Zeolite TON with Neon at High Pressure

et al. 2018

View full text Add to dashboard Cite

The insertion of neon and argon in the 1-D pore system of the zeolite TON was studied at high pressure by Xray diffraction and by Monte Carlo (MC) molecular modeling. Rietveld refinements of the crystal structure of TON and the MC results indicate that 12 Ne atoms enter the unit cell of TON, completely filling the pores. This is much greater than the degree of filling observed for argon, which due to size considerations lies in a vertical plane in the pores. A phase transition from the Cmc2 1 to a Pbn2 1 structure occurs at 0.6 GPa with cell doubling. The compressibility and structural distortions, such as pore ellipticity, are considerably reduced as compared to the argon-filled or the empty-pore material. In addition, the crystalline form persists to pressures of the order of 20 GPa, and the Pbn2 1 phase is recovered after decompression. The results show the very strong and different effects of pore filling by noble gases on the structural stability and mechanical properties of this prototypical 1-D zeolite-type material.

show abstract

The structural stability of AlPO4-5 zeolite under pressure: Effect of the pressure transmission medium

Cited by 14 publications

References 24 publications

Insertion of N2 into the Channels of AFI Zeolite under High Pressure

Insertion of N2 into the Channels of AFI Zeolite under High Pressure

Pressure-Driven Topological Transformations of Iodine Confined in One-Dimensional Channels

Saturation of the Siliceous Zeolite TON with Neon at High Pressure

Contact Info

Product

Resources

About