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1. Reference Diffraction Patterns, Microstructure, and Pore Size Distribution for the Copper (II) benzene-1,3,5-tricarboxylate Metal Organic Framework (Cu-BTC) Compounds
Published: 3/1/2015
Authors: Winnie K Wong-Ng, James A. Kaduk, Daniel W Siderius, Andrew John Allen, Laura Espinal, Brad Boyerinas, Igor Levin, Matthew Suchomel, Jan Ilavsky, Eric J Cockayne, Hui Wu
Abstract: Cu-paddle-wheel-based Cu3(BTC)2 (nicknamed Cu-BTC, where BTC ≡ benzene 1,3,5-tricarboxylate) is a metal organic framework (MOF) compound that adopts a zeolite topology. We have determined the pore size distribution using the Gelb and Gubbins te ...

2. Porosity and Its Measurement
Published: 9/17/2013
Author: Laura Espinal
Abstract: Numerous approaches have been applied for measuring the porosity of materials. The most common techniques are based on gas sorption, liquid intrusion, microscopy, and X-ray and neutron scattering. Each technique provides a characteristic value of por ...

3. First-principles Studies of Carbon Dioxide Adsorption in Cryptomelane/Hollandite-Type Manganese Dioxide
Published: 8/6/2013
Authors: Lan Li, Eric J Cockayne, Laura Espinal, Winnie K Wong-Ng
Abstract: Carbon capture with porous solid state materials requires temperature and/or pressure cycles to absorb and then desorb carbon dioxide (CO2). A critical challenge in developing engineered materials for low-energy-cost carbon capture and storage app ...

4. Investigation of NaY Zeolite with Adsorbed CO2 by Neutron Powder Diffraction
Published: 5/17/2013
Authors: Winnie K Wong-Ng, James A. Kaduk, Qingzhen Huang, Laura Espinal, Lan (Lan) Li, Jacob W Burress
Abstract: The crystal structure of dehydrated NaY zeolite (Na-FAU structure type) with and without adsorbed CO2 has been determined at 4K and at room temperature (RT) using neutron powder diffraction techniques. The CO2-containing sample was prepared at -78 °C ...

5. Flexible Metal Organic Framework Compound, Ni(1,2-bis(4-pyridyl)ethylene)[Ni(CN)4]n, for CO2 Sorption Applications
Published: 4/7/2013
Authors: Winnie K Wong-Ng, Jeffrey T Culp, Yu-Sheng Chen, Laura Espinal, Andrew John Allen, Daniel W Siderius, Craig Brown, Wendy Queen, Peter Zavalij, Christopher Matranga
Abstract: New sorbent materials are required for carbon capture because coal-fired electrical power plants, the largest emitters of this greenhouse gas, will continue to produce much of our nation‰s electricity for at least several decades. Within the family o ...

6. Improved Synthesis and Crystal Structure of the Flexible Pillared Layer Porous Coordination Polymer: Ni(1,2-bis(4-pyridyl)ethylene)[Ni(CN)4]
Published: 4/4/2013
Authors: Winnie K Wong-Ng, Jeffrey T Culp, Yu-Sheng Chen, Peter Zavalij, Laura Espinal, Daniel W Siderius, Andrew John Allen, Steve Scheins, Christopher Matranga
Abstract: A new method of synthesis was developed for the flexible coordination polymer Ni(L)[Ni(CN)4], L=1,2-bis(4-pyridyl)ethylene (bpene) to increase its CO2 sorption uptake. The structure of the newly synthesized bpene has been determined by synchrotron X ...

7. Materials Challenges in Carbon Mitigation Technologies
Published: 4/24/2012
Authors: Laura Espinal, Bryan D. Morreale
Abstract: Thermochemical conversion of fossil fuels currently dominates the national and global energy portfolio, with the most notable being the stationary power production and transportation vehicles sectors. As global energy demand continues to increase, p ...

8. Carbon Storage Properties of OMS-2 Manganese Oxide
Published: 4/10/2012
Authors: Lan (Lan) Li, Eric J Cockayne, Laura Espinal, Winnie K Wong-Ng
Abstract: Manganese oxide OMS-2 material, also known as alpha-MnO2, exhibits CO2 sorption hysteresis at pressures > 7 bar. Our experiments show that the hysteretic behavior strongly depends on time, temperature and pressure. To understand the atomic structures ...

9. Time dependent CO2 sorption hysteresis in a one-dimensional microporous octahedral molecular sieve
Published: 4/6/2012
Authors: Laura Espinal, Winnie K Wong-Ng, Andrew John Allen, Daniel W Siderius, Chad R Snyder, Eric J Cockayne, Lan (Lan) Li, James A. Kaduk, Anais E. Espinal, Steven L. Suib, Chun Chiu
Abstract: A critical challenge in the development of novel carbon capture materials with engineered porous architectures is to understand and control the phenomenon of sorption hysteresis, whereby the path to adsorption of gas molecules by the porous host diff ...

10. Ultra-small-Angle X-ray Scattering ‹ X-ray Photon-Correlation Spectroscopy Studies of Incipient Structural Changes in Amorphous Calcium Phosphate Based Dental Composites
Published: 2/28/2012
Authors: Fan Zhang, Andrew John Allen, Lyle E Levine, Laura Espinal, Joseph M Antonucci, Drago Skrtic, Justin N.R. O'Donnell, Jan Ilavsky
Abstract: The local structural changes in amorphous calcium phosphate (ACP) based dental composites were studied upon heating using both static, bulk measurement techniques and recently developed ultra-small angle X-ray scattering ‹ X-ray photon correlation sp ...

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