Adsorption Characteristics of Modified MiL-101(Cr) for Gas (Mainly CH4) Storage Applications

2015 ◽  
Author(s):  
How Wei Benjamin Teo ◽  
Anutosh Chakraborty ◽  
Kim Tiow Ooi
Keyword(s):  
Natural Gas ◽  
X Ray Diffraction ◽  
Uptake Capacity ◽  
N2 Adsorption ◽  
Thermo Gravimetric ◽  
X Ray ◽  
Thermo Gravimetric Analyzer ◽  
Metal Organic ◽  
Ch4 Uptake

As promising material for gas storage applications, MIL-101(Cr) can further be modified by doping with alkali metal (Li+, Na+, K+) ions. However, the doping concentration should be optimized below 10% to improve the methane adsorption. This article presents (i) the synthesis of MIL-101 (Cr) Metal Organic Frameworks, (ii) the characterization of the proposed doped adsorbent materials by X-ray Diffraction, Scanning Electron Microscopy, N2 Adsorption, Thermo-Gravimetric Analyzer, and (iii) the measurements of methane uptakes for the temperatures ranging from 125 K to 303 K and pressures up to 10 bar. It is found that the Na+ doped MIL-101(Cr) exhibits CH4 uptake capacity of (i) 295 cm3/cm3 at 10 bar and 160 K and (ii) 95 cm3/cm3 at 10 bar at 298 K. This information is important to design adsorbed natural gas (ANG) storage tank under ANG-LNG (liquefied natural gas) coupling conditions.

Fabrication and characterization of electro-active cellulose films regenerated by using 1-butyl-3-methylimidazolium chloride ionic liquid

2013 ◽  
Vol 227 (12) ◽  
pp. 2665-2670 ◽  
Author(s):  
Ki-Baek Kim ◽  
Jaehwan Kim
Keyword(s):  
Ionic Liquid ◽  
Regenerated Cellulose ◽  
Cellulose Solution ◽  
Cellulose Film ◽  
X Ray Diffraction ◽  
Thermo Gravimetric ◽  
X Ray ◽  
Thermo Gravimetric Analyzer ◽  
Regenerated Cellulose Film

This article reports dissolution, regeneration, and characterization of cellulose using an ionic liquid, namely 1-butyl-3-methylimidazolium chloride (BMIMCl). During dissolving process, BMIMCl takes much less time to dissolve cellulose with high degree of polymerization (DP = 4500) than other solvent system, lithium chloride/ N,N-dimethylacetamide (LiCl/DMAc). Regenerated cellulose film from BMIMCl–cellulose solution is characterized by viscosity, thermo gravimetric analyzer, X-ray diffraction, pull test, and transmittance test. Compared with LiCl/DMAc–cellulose, BMIMCl–cellulose solution has lower viscosity and its film has lower Young's modulus and yield strength. From thermo gravimetric analyzer and X-ray diffraction experiment, BMIMCl–cellulose film has impurity and X-ray diffraction pattern similar with those of LiCl/DMAc–cellulose film. BMIMCl–cellulose film exhibits higher transmittance. The ionic liquid recovery test verifies that BMIMCl is highly recoverable with 99%, which proves that BMIMCl is a green solvent. Through the bending displacement test, the BMIMCl–cellulose film shows a good actuation behavior of electro-active paper.

Growth and Characterization of Lithium Niobate Thin Films on Diamond/Si(100) Substrates

1998 ◽  
Vol 541 ◽  
Author(s):  
Shunxi Wang ◽  
Qingxin Su ◽  
Marc A. Robert ◽  
Thomas A. Rabson
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Scanning Electron Microscopy ◽  
Smooth Surface ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metal Organic ◽  
Scanning Electron ◽  
Organic Decomposition

AbstractA low temperature metal-organic decomposition process for depositing LiNbO3 thin films on diamond/Si(100) substrates is reported. X-ray diffraction studies show that the films are highly textured polycrystalline LiNbO3 with a (012) orientation. Scanning electron microscopy analyses reveal that the LiNbO3 thin films have dense, smooth surface without cracks and pores, and adhere very well to the diamond substrates. The grain size in the LiNbO3 thin films is in the range of ∼0.2-0.5 μm. The effect of the processing procedures on the surface morphology of the LiNbO3 films is investigated. Possible reasons for the elimination of microcracks in the LiNbO3 films are discussed.

scholarly journals NMR-Enhanced Crystallography Aids Open Metal-Organic Framework Discovery Using Solvent-Free Accelerated Aging

2019 ◽  
Author(s):  
Christopher A. O’Keefe ◽  
Cristina Mottillo ◽  
László Fábián ◽  
Tomislav Friscic ◽  
Robert W. Schurko
Keyword(s):  
Solid State Nmr ◽  
Metal Organic Framework ◽  
Accelerated Aging ◽  
Solvent Free ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metal Organic ◽  
It Application ◽  
Organic Framework

NMR-enhanced crystallography enables the characterization of a novel cadmium-based, open metal-organic framework (MOF) from a solvent-free "accelerated aging" process. Whereas accelerated aging was devised as a clean, mild route for making MOFs, these results highlight how it application in materials discovery and characterization is aided by a combination of X-ray diffraction and solid-state NMR spectroscopy.<br>

scholarly journals Synthesis and Characterization of Carbon-Based Composites for Hydrogen Storage Application

2021 ◽  
Vol 12 (1) ◽  
pp. 52
Author(s):  
Arslan Munir ◽  
Ali Ahmad ◽  
Muhammad Tahseen Sadiq ◽  
Ali Sarosh ◽  
Ghulam Abbas ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Energy Production ◽  
Metal Organic Framework ◽  
Synthesis And Characterization ◽  
Hydrogen Energy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metal Organic ◽  
Carbon Based

Recent development shows that carbon-based composites are proving to be the most promising materials in hydrogen energy production, storage and conversion applications. In this study, composites of the copper-based metal-organic framework with different ratios of graphite oxide have been prepared for hydrogen storage application. The developed materials are characterized by X-ray diffraction (XRD), gravimetric thermal analysis (TGA), scanning electron microscopy (SEM) and BET. The newly developed composites have an improved crystalline structure and an increased surface area. The results of the experiment showed that the composite material MOF/GO 20% can store 6.12% of hydrogen at −40 °C.

Synthesis and Characterization of Bi2S3 Nanorods Decorated on Carbon Sphere and Study its Electrochemical Application

2014 ◽  
Vol 938 ◽  
pp. 215-220 ◽  
Author(s):  
P. Devendran ◽  
T. Alagesan ◽  
K. Pandian
Keyword(s):  
Carbon Sphere ◽  
Capping Agent ◽  
Bismuth Sulfide ◽  
X Ray Diffraction ◽  
Trace Level ◽  
Thermo Gravimetric ◽  
X Ray ◽  
Electrochemical Application ◽  
Ultra Trace

Bismuth sulfide(Bi2S3) nanorods(NRs) decorated on uniform shape carbon sphere(CS)have been prepared by hydrothermal method, using single source precursorpolyvinyl pyrrolidone(PVP) as a capping agent. The nanoparticles were synthesized with different ratio of capping agent at different temperatures.The prepared nanoparticles were characterized by FTIR spectroscopy,thermo gravimetric and differential thermal analysis. The crystallinity, morphology and elemental composition of the synthesized nanocrystals have been confirmed through X-ray diffraction (XRD), HRSEMand EDX. The electrochemical catalytic activity on the reduction of catechol of the synthesized Bi2S3NRs has been investigated.The electrocatalytic oxidation of catechol done with Bi2S3NRs coated CS/GCE modified by using CV and the effect of the scan rate also studied. The modified nanocomposites Bi2S3NRs on CS in GCE are act as a good sensor by detection of catechol in ultra trace level by using DPV techniques.

scholarly journals Synthesis of MOFs from Zn,Cd,Ni-4-carboxyphenylboronic acid with DMF solvent

2014 ◽  
Vol 70 (a1) ◽  
pp. C1129-C1129
Author(s):  
Louiza Dimowa ◽  
Rositsa Nikolova ◽  
Ventsi Dyulgerov ◽  
Vladislav Kostov-Kytin ◽  
Boris Shivachev
Keyword(s):  
Single Crystal ◽  
Solvothermal Synthesis ◽  
Chemical Properties ◽  
Porous Metal ◽  
X Ray Diffraction ◽  
X Ray ◽  
Synthesis Strategy ◽  
Metal Organic ◽  
New Type

Synthesis and characterization of porous metal organic frameworks (MOFs) has prompted considerable interest because of the possibility to design the pore size and physical/chemical properties by suitable selection of the organic linkers (ligands). In this work, we have chosen a classical solvothermal synthesis strategy involving 4-carboxyphenylboronic acid, a molecule that is analogic to the terephthalic acid, Zn- Cd- Ni-OAc metal salts and DMF as solvent. It is known that during solvothermal synthesis DMF decomposes to dimethylamine which is easily incorporated in MOF's [1], [2]. The obtained MOFs are characterized by single-crystal X-ray diffraction, X-ray powder diffraction, TG analyses, IR spectroscopy and BET analyses. Preliminary X-ray single crystal diffraction results showed that a new type of structure may be produced in function of the temperature. The Cd- structure crystalizes in the hexagonal Space group P6222, with respective parameters of a = 14.4113(12), c = 13.0416(7) Å (Fig. 1). The cadmium ion is tetra coordinated by the oxygens of the B(OH)2 and COO- moieties. The 4-carboxyphenylboronic acid is disorder and attempts to lower the symmetry to model the disorder resulted in unstable refinement. In the studied systems in addition to the reported new compound isotypical structures to MOF-5 containing 4-carboxyphenylboronic acid instead of 1,4-benzenedicarboxylate were also obtained.

scholarly journals Indonesian Modified Clay for Dye Waste Treatment

2020 ◽  
Vol 3 (1) ◽  
pp. 122
Author(s):  
Iwan Sumarlan ◽  
Is Fatimah ◽  
Karna Wijaya
Keyword(s):  
Methyl Orange ◽  
Diffuse Reflectance ◽  
Waste Treatment ◽  
Impregnation Method ◽  
X Ray Diffraction ◽  
N2 Adsorption ◽  
X Ray ◽  
Uv Illumination ◽  
Uv Visible

Synthesis and Characterization of TiO2 Coated on Clay Pillared Alumina (PILC) for Methyl Orange Photodegradation Under UV Illumination. The synthesis included both pillarization the clay with alumina and TiO2 coated on PILC using impregnation method. Some characterizations also were employed to this research such as X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), N2 Adsorption Isotherm and UV-Visible Diffuse Reflectance (DR UV). The photocatalyst was then used to decompose waste dye, methyl orange (MO). Among three photocatalysts that were successfully synthesized, PILC Ti 1.0% had the highest activity to decompose the waste dye.

scholarly journals Crystallographic Characterization of the Metal–Organic Framework Fe2(bdp)3 upon Reductive Cation Insertion*

2020 ◽  
Author(s):  
Naomi Biggins ◽  
Michael Ziebel ◽  
Miguel Gonzalez ◽  
Jeffrey R. Long
Keyword(s):  
Single Crystal ◽  
Single Crystals ◽  
Metal Organic Framework ◽  
X Ray Diffraction ◽  
X Ray ◽  
Π Interactions ◽  
Cation Framework ◽  
Metal Organic ◽  
Organic Framework

<div><p>Precisely locating extra-framework cations in anionic metal–organic framework compounds remains a long-standing, yet crucial, challenge for elucidating structure-performance relationships in functional materials. Single-crystal X-ray diffraction is one of the most powerful approaches for this task, but single crystals of frameworks often degrade when subjected to post-synthetic metalation or reduction. Here, we demonstrate the growth of sizable single crystals of the robust metal–organic framework Fe<sub>2</sub>(bdp)<sub>3</sub> (bdp<sup>2−</sup> = benzene-1,4-dipyrazolate) and employ single-crystal-to-single-crystal chemical reductions to access the solvated framework materials A<sub>2</sub>Fe<sub>2</sub>(bdp)<sub>3</sub>∙<i>y</i>THF<sub> </sub>(A = Li<sup>+</sup>, Na<sup>+</sup>, K<sup>+</sup>). X-ray diffraction analysis of the sodium and potassium congeners reveals that the cations are located near the center of the triangular framework channels and are stabilized by weak cation–π interactions with the framework ligands. Freeze-drying with benzene enables isolation of activated single crystals of Na<sub>0.5</sub>Fe<sub>2</sub>(bdp)<sub>3 </sub>and Li<sub>2</sub>Fe<sub>2</sub>(bdp)<sub>3</sub> and the first structural characterization of activated metal–organic frameworks wherein extra-framework alkali metal cations are also structurally located. Comparison of the solvated and activated sodium-containing structures reveals that the cation positions differ in the two materials, likely due to cation migration that occurs upon solvent removal to maximize stabilizing cation­–π interactions. Hydrogen adsorption data indicate that these cation-framework interactions are sufficient to diminish the effective cationic charge, leading to little or no enhancement in gas uptake relative to Fe<sub>2</sub>(bdp)<sub>3</sub>. In contrast, Mg<sub>0.85</sub>Fe<sub>2</sub>(bdp)<sub>3</sub> exhibits enhanced H<sub>2</sub> affinity and capacity over the non-reduced parent material. This observation shows that increasing the charge density of the pore-residing cation serves to compensate for charge dampening effects resulting from cation–framework interactions and thereby promotes stronger cation–H<sub>2</sub> interactions.</p></div>

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