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.
Ortiz-Martinez, K., Roman, F.R. and Hernández-Maldonado, A.J. “Fixed-bed Adsorption of Contaminants of Emerging Concern from Water using Cu2+ Amino Grafted SBA-15.” Spring 2017 ACS National Meeting, San Francisco, CA – April 2017
Arrieta-Perez, R. R., Primera-Pedrozo, J. N., Marcano-Gonzalez, M. E., Exley, J., Hogan, J. A., Jan, D. L. and Hernández-Maldonado, A.J. “Porous Flexible Cu2(pzdc)2(L) [pzdc = 2,3-pyrazinedicarboxylate; L = 1,3-bis(imidazol-1-yl)benzene or 1,3-bis(4-pyridyl)propane] Pillared-Layer Structures.” Spring 2017 ACS National Meeting, San Francisco, CA – April 2017
Fernández Reyes, B., González-Ramos, K. M., Ortiz-Martinez, K. and Hernández-Maldonado, A.J. "Adsorptive Removal of Contaminants of Emerging Concern from Water with Imprinted Zeolite Carbon Composites Functionalized with Extra-Framework Cu2+” Spring 2017 ACS National Meeting, San Francisco, CA – April 2017
Fernández Reyes, B., González-Ramos, K. M. and Hernández-Maldonado, A.J. "Imprinted Zeolite Carbon Composites for the Removal of Contaminants of Emerging Concern from Water.” 2017 Emerging Researchers National Conference, Washington, DC – March 2017
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
Wang, Y.; Chen, J.; Wei, X.; Hernández-Maldonado, A.J.; Chen, Z. Unveiling Adsorption Mechanisms of Organic Pollutants onto Carbon Nanomaterials by DFT Computations and pp-LFER Modeling. Environ. Sci. Technol. 2017, accepted. (Link)
Wei, X.; Wang, Y.; Hernández-Maldonado, A.J.; Chen, Z. Guidelines for Rational Design of High-Performance Absorbents: A Case Study of Zeolite Adsorbents for Emerging Pollutants in Water. Green Energ. Environ. 2017, accepted. (Link)
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)
04-18-2017: USPTO Approves Patent (US 9,623,364) for NSSAL Adsorbent Material
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.