Pore-size-tuned host–guest interactions in Co-MOFs via in situ microcalorimetry: adsorption and magnetism

2017 ◽  
Vol 5 (5) ◽  
pp. 1064-1073 ◽  
Author(s):  
Chengfang Qiao ◽  
Lin Sun ◽  
Sheng Zhang ◽  
Ping Liu ◽  
Liangliang Chang ◽  
...  
Keyword(s):  
Pore Size ◽  
Guided Assembly ◽  
In Situ Microcalorimetry

This article proposes guided-assembly strategies by microcalorimetry for encapsulating guests within Co-MOFs endowed with excellent adsorption and magnetism.

scholarly journals Correction: Pore-size-tuned host–guest interactions in Co-MOFs via in situ microcalorimetry: adsorption and magnetism

2017 ◽  
Vol 5 (17) ◽  
pp. 4335-4335
Author(s):  
Chengfang Qiao ◽  
Lin Sun ◽  
Sheng Zhang ◽  
Ping Liu ◽  
Liangliang Chang ◽  
...  
Keyword(s):  
Pore Size ◽  
In Situ Microcalorimetry

Correction for ‘Pore-size-tuned host–guest interactions in Co-MOFs via in situ microcalorimetry: adsorption and magnetism’ by Chengfang Qiao et al., J. Mater. Chem. C, 2017, 5, 1064–1073.

Size of pores of Kohn: influence of transpulmonary and vascular pressures

1981 ◽  
Vol 51 (3) ◽  
pp. 739-745 ◽  
Author(s):  
R. W. Mazzone ◽  
S. Kornblau
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Pore Size ◽  
Minimum Diameter ◽  
Transmission Electron ◽  
Zone Ii ◽  
The Mean ◽  
Alveolar Septa ◽  
Collateral Ventilation

We investigated the influence of transpulmonary (Ptp) and vascular pressures on the size of the pores of Kohn in primary alveolar septa. Dogs lungs, perfused and ventilated in situ, were rapidly frozen with Freon 22 in zone II or III conditions following deflation to Ptp of 5, 15, or 25 cmH2O. Frozen samples were freeze-substituted for transmission electron microscopy. Five fields containing at least one pore each were selected randomly from each section of tissue, and the minimum diameter visible in the cut section was measured. For both zone II and III conditions, as Ptp increased, mean pore size increased. The mean pore size under zone III conditions was 1.2015, 1.788, and 2.249 micrometer for Ptp of 5, 15, and 25 cmH2O, respectively. For zone 2 conditions, the corresponding values were 1.1438, 1,8757, and 2.08 micrometer. For both zones II and III, increasing capillary hydrostatic pressure had no significant effect on pore size. The results support the notion that alveolar pores can increase collateral ventilation by dynamically stretching as Ptp increases. Capillary pressure does not influence pore size probably because of collagen fibers, which surround the pore lumen. Presumably, these fibers resist encroachment of capillaries on the pore lumen as vascular pressures increase.

The Preparation of High-Strength and Micropore Lightweight Bauxite Aggregate by In Situ Polymerization and Decomposition

2011 ◽  
Vol 194-196 ◽  
pp. 2135-2139
Author(s):  
Yi Neng Fang ◽  
Hua Zhi Gu ◽  
Yun Sheng Fen ◽  
Lin Jun Wang ◽  
Yan Jing Li
Keyword(s):  
Phase Composition ◽  
Pore Size ◽  
Aluminium Hydroxide ◽  
Average Pore Size ◽  
High Strength ◽  
Organic Polymer ◽  
Low Grade ◽  
Pore Former ◽  
Average Pore

High-strength and micropore lightweight bauxite aggregate was fabricated by low grade raw bauxite powder, aluminium hydroxide powder and organic polymer (OP). OP was used as consolidator, binder and pore former and aluminium hydroxide was used as pore former. The influence of OP and aluminium hydroxide content on the property of the samples was studied. The phase composition and the microstructure of the sintered samples were characterized by XRD, SEM and the pore size distribution was measured by mercury porosimety. The results demonstrate that the bulk density of the samples decreases linearly and the apparent porosity of the samples increases gradually with the addition of OP. The lowest density reached 1.13g/cm3when adding 35% OP and 10% Al(OH)3. The average pore size is around 5μm, and increases with the addition of OP increased. The XRD showed the main phase of the sample is mullite and some little amount of corundum.

In situ formed methyl-co-(bis-R) silsesquioxane based polymer networks with solvent controlled pore size distributions and high surface areas

2020 ◽  
Vol 4 (3) ◽  
pp. 851-861 ◽  
Author(s):  
Nai-hsuan Hu ◽  
Chamika U. Lenora ◽  
Timothy A. May ◽  
Nathan C. Hershberger ◽  
Joseph C. Furgal
Keyword(s):  
Pore Size ◽  
High Surface ◽  
Polymer Networks ◽  
Size Distributions ◽  
Surface Areas ◽  
Pore Size Distributions

Specific pore size distributions of synthesized methylsilsesquioxane-based network materials stem from a combination of the solvation of monomers and growing oligomers, as well as miscibility of water in tested solvents; enabling specific analyte uptake materials.

Experimental Evidence of Super Densification of Adsorbed Hydrogen by in-situ Small Angle Neutron Scattering (SANS)

2011 ◽  
Vol 1334 ◽  
Author(s):  
Dipendu Saha ◽  
Lilin He ◽  
Cristian I. Contescu ◽  
Nidia C. Gallego ◽  
Yuri B. Melnichenko
Keyword(s):  
Neutron Scattering ◽  
Pore Size ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Hydrogen Gas ◽  
Necessary Condition ◽  
Adsorbed Hydrogen ◽  
Oak Ridge ◽  
Hydrogen Molecules

ABSTRACTEntrapping hydrogen molecules within the nanopores of solid adsorbents serves as a unique alternative for on-board storing of hydrogen for transportation purposes. The key advantage of the physisorption process for hydrogen storage is the higher density values achieved with the adsorbed gas, compared to that of the compressed phase, translating into higher storage capacities at lower pressures. The necessary condition for effective adsorption is the presence of narrow micropores of < 2 nm in width which provide the most suitable environment of hydrogen adsorption. Despite numerous theoretical calculations or indirect experimental estimations, there has not been a direct experimental measurement of the density of adsorbed hydrogen as a function of pressure and/or pore size. In the present study, we report on the use of in-situ small angle neutron scattering (SANS) to study the phase behavior of hydrogen confined in narrow micropores. We provide for the first time direct experimental measurements of the effect of pore size and pressure on hydrogen adsorbed on a polyfurfuryl alcohol-derived activated carbon (PFAC), at room temperature and pressures up to 207 bar. SANS studies were carried out at the General-Purpose Small-Angle Neutron Scattering spectrometer of the High Flux Isotope Reactor at Oak Ridge National Laboratory. The measurements covered the Q-range from 0.01 to 0.8 Å-1, covering the pores in the range of 9 to 34 Å of the PFAC material. Initial results suggest that the density of adsorbed hydrogen is higher than the density of bulk hydrogen gas and increases with decreasing pore size.

A solvent-free dense energetic metal–organic framework (EMOF): to improve stability and energetic performance via in situ microcalorimetry

2017 ◽  
Vol 53 (21) ◽  
pp. 3034-3037 ◽  
Author(s):  
Yinli Zhang ◽  
Sheng Zhang ◽  
Lin Sun ◽  
Qi Yang ◽  
Jing Han ◽  
...  
Keyword(s):  
High Stability ◽  
Metal Organic Framework ◽  
Solvent Free ◽  
Energetic Properties ◽  
Metal Organic ◽  
Solvent Molecules ◽  
Energetic Performance ◽  
Improve Stability ◽  
In Situ Microcalorimetry

An interpenetrating EMOF without solvent molecules, which possess high stability and outstanding energetic properties, was obtained.

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