Welcome to Prof. Hernández-Maldonado's Research Group Homepage!

The Nanoporous Sorbents and Adsorption Lab (NSSAL) at the University of Puerto Rico - Mayaguez focuses on the development and tailoring of new porous materials for chemical separation and recovery processes at ambient or mild conditions. The challenge is to synthesize new materials with specific framework topologies and novel compositions based on templated hydrothermal paths or surface functionalization.

 

Our synthesis efforts include metal substituted aluminophosphates (MAPOs), flexible titaniumsilicates(TS), mesoporous silica, coordination polymers and metal organic frameworks (MOFs). In terms of applications, we are interested in carbon dioxide removal in closed-systems, ultrapurification of light gas mixtures, and removal of emerging organic contaminants from potable water sources, just to mention a few.

Recent Presentations

Hernández-Maldonado, A.J. and Ragusa, G. “Building Effective STEM Centers: Consortiums & Collaboration for Research and Teaching.” NSF ASSIST: Early-Career Faculty Development Symposium, 2016 HENAAC Conference, Anaheim, CA – October 2016

Hernández-Maldonado, A.J. “Superior Rigid and Flexible Nanoporous Materials for Adsorption Based Applications.” College of Art and Sciences, College of Engineering, University of Lousiana, Lafayette, LA – August 2016

Hernández-Maldonado, A.J., Ortiz-Martinez, K., Cabrera-Lafaurie, W. A. and Karen Gonzalez-Ramos, K. Design of Transition Metal Based Composite Adsorbents for the Selective Removal of Contaminants of Emerging Concern from Water.” Spring 2016 ACS National Meeting, San Diego, CA – March 2016

Ortiz-Martinez, K., Guerrero-Medina, K. J., Roman, F.R. and Hernández-Maldonado, A.J. “Transition Metal Modified Mesoporous Silica Adsorbents with Zero Surface Microporosity for the Adsorption of Contaminants of Emerging Concern from Aqueous Solutions.” Fall 2015 ACS National Meeting, Boston, MA – August 2015

Guerrero-Medina, J., Mass-González, G., Pacheco-Londoño, L., Hernández-Rivera, S. P, Fu, . R. and Hernández-Maldonado A.J. “Structural Changes in M[(bdc)(ted)0.5] (M = Zn, Ni or Cu) Metal Organic Frameworks Upon Thermal Dispersion of LiCl and Adsorption of Carbon Dioxide.” Fall 2015 ACS National Meeting, Boston, MA – August 2015

Riascos-Rodríguez, K., Schroeder, A. J., Arend, M. R., Evans, P. G. and Hernández-Maldonado, A.J. “Hysteretic Adsorption of CO2 onto a Cu2(pzdc)2(bpy) Porous Coordination Polymer and Concomitant Framework Distortion.” Fall 2015 ACS National Meeting, Boston, MA – August 2015

Huanhao, C., Riascos-Rodríguez, K., Marcano-González, M. E. and Hernández-Maldonado, A.J. “Flexible Cu2(pzdc)2L [L= dipyridyl-based ligands] Porous Coordination Polymers: Hysteretic Adsorption and Diffusion Kinetics of CO2 and CH4.” Fall 2015 ACS National Meeting, Boston, MA – August 2015

Mass-González, G., Guerrero-Medina, J., Pacheco-Londoño, L., Hernández-Rivera, S. P., Fu, R. and Hernández-Maldonado, A.J. “Spontaneous Thermal Dispersion of LiCl in [Zn(bdc)(ted)0.5]: A Study of Structural Changes and Pure Component Equilibrium Adsorption of Carbon Dioxide, Methane and Hydrogen.” Fall 2015 ACS National Meeting, Boston, MA – August 2015

Ortiz-Martinez, K., Guerrero-Medina, K.J., Roman, F.R. and Hernández-Maldonado, A.J. “Superior Transition Metal Modified Silica Mesoporous Materials for the Adsorption of Emerging Contaminants from Water.” 2015 Emerging Researchers National Conference, Washington, DC – February 2015

Guerrero Medina, J., Mass, G. and Hernández-Maldonado A.J. “Spontaneous Thermal Dispersion of LiCl in M(bdc)(ted)0.5 (M= Zn, Ni or Cu) Metal Organic Frameworks.” 2015 Emerging Researchers National Conference, Washington, DC – February 2015

 

Recent Publications

Ortiz-Martínez, K.; Reddy, P.; Cabrera-Lafaurie, W.A.; Román, F.R.; Hernández-Maldonado, A.J. Single and Multi-component Adsorptive Removal of Bisphenol A and 2,4-Dichlorophenol from Aqueous Solutions with Transition Metal Modified Inorganic-Organic Pillared Clay Composites: Effect of pH and Presence of Humic Acid. J. Hazard. Mater. 2016, 312, 262. (Link)

Hernández-Maldonado, A.J.; Arrieta-Pérez, R.R.; Primera-Pedrozo, J.N.; Exley, J. Structure of a Porous Cu2(pzdc)2(bpp) (pzdc: pyrazine-2,3-dicarboxylate; bpp: 1,3-bis(4-pyridyl)propane) Coordination Polymer and Flexibility upon Concomitant Hysteretic CO2 Adsorption. Cryst. Growth Des. 2015, 15, 4123 (Link)

Guerrero-Medina, J.; Mass-González, G.; Fu, R.; Hernández-Maldonado, A.J. Long and Local Range Structural Changes in M[(bdc)(ted)0.5] (M = Zn, Ni or Cu) Metal Organic Frameworks upon Spontaneous Thermal Dispersion of LiCl and Adsorption of Carbon Dioxide. Microporous Mesoporous Mat. 2015, 212, 8-17 (Link)

Hernández-Maldonado, A.J.; Blaney, L. Advances in Analysis, Treatment Technologies, and Environmental Fate of Emerging Contaminants. J. Hazard. Mater. 2015, 282, 1.(Link)

Marcano-González, M.E.; Fu, R.; Hernández-Maldonado, A.J. Long and Local Range Structural Changes in Flexible Titanium Silicates with Variable Faulting Upon Thermal Treatment and Corresponding Adsorption and Particle Size Polydispersity Corrected Diffusion Parameters for CO2/CH4 Separation. Ind. Eng. Chem. Res. 2015, 54, 207. (Link)

Ortiz-Martínez, K.; Guerrero-Medina, K.J.; Román, F.R.; Hernández-Maldonado, A.J. Transition Metal Modified Mesoporous Silica Adsorbents with Zero Microporosity for the Adsorption of Contaminants of Emerging Concern (CECs) from Aqueous Solutions. Chem. Eng. J. 2015, 264, 152. (Link)

Cabrera-Lafaurie, W.A.; Román, F.R.; Hernández-Maldonado, A.J. Single and Multi-Component Adsorption of Salicylic Acid, Clofibric Acid, Carbamazepine and Caffeine from Water onto Transition Metal Modified and Partially Calcined Inorganic-Organic Pillared Clay Fixed Beds. J. Hazard. Mater. 2015, 282, 174. (Link)

Yu, M.; Primera-Pedrozo, J.N.; Marcano-González, M.E.; Hernández-Maldonado, A.J. Selective Adsorption of N2 over CH4 in Flexible Sr2+- and Ba2+-UPRM-5 Titanium Silicates: Effect of Activation Temperature. Chem. Eng. J. 2014, 252, 311. (Link)

 

News

11-10-2016: The NSSAL group welcomes two new grad students members: Mr. Juan Carlos Muñoz and Mr. Ricardo Bacó

03-11-2014: The NSSAL group welcomes new grad student Mrs. Silvana Urcia

05-10-2013: USPTO Approves Patent (US 8,440,166) for UPRM-5 Material

10-03-2012: The NSSAL group welcomes two new grad students members: Mrs. Karina Riascos and Mr. Rodinson Arrieta

10-31-2011: Ana Arevalo's poster presentation during the 2011 Society of Hispnaic Professional Engineers (SHPE) Annual Conference was awarded first place within the Graduate Poster Technical section. The award is sponsored by Chevron Corporation. Congratulations to Ana!!!

02-26-2011: José Primera-Pedrozo 's presentation during the 2011 Emerging Researchers National (ERN) Conference in Science, Technology, Engineering and Mathematics (STEM) was awarded first place within the Chemistry and Chemical Sciences discipline. The ERN is hosted by the American Association for the Advancement of Science (AAAS), Education and Human Resources Programs (EHR) and the National Science Foundation (NSF). Congratulations to José!!!

12-01-2010: NSSAL welcomes to our group new grad students Jennifer Guerrero and Marietta Marcano.

Number of Visitors: