University of Cincinnati Home Page.
Dionysios (Dion) Demetriou Dionysiou University of Cincinnati logo.
             Professor and Graduate Program Director
Environmental Engineering and Science Program
School of Energy, Environmental, Biological, and Medical Engineering (SEEBME)
University of Cincinnati
Cincinnati, Ohio 45221-0071
Office Number: Engineering Research Center (ERC) 780
Tel: (513) 556-0724; FAX: (513) 556-2599



2001    Ph.D.               Environmental Engineering                            University of Cincinnati

1995        M.S.                Chemical Engineering                                     Tufts University                     

1991    Diploma          Chemical Engineering                                     National Technical University of Athens (N.T.U.A.), Greece



3/2008-2/2009             Assistant Department Head                                                   

for Research Excellence                                 University of Cincinnati

9/2008-present             Professor                                                         University of Cincinnati

9/2005-8/2008             Associate Professor                                         University of Cincinnati

9/2000-8/2005             Assistant Professor                                         University of Cincinnati

9/1995-8/2000             Graduate Research Assistant                          University of Cincinnati

9/1994-6/1995             Research Engineer                                          W. R. Grace, Massachusetts

8/1992-8/1994            Graduate Research Assistant                          Tufts University

9/1990-10/1991           Research Assistant                                          N.T.U.A., Greece.

7/1984-9/1986            Military Service                                               Cyprus Army



Professor Dionysiou performs research in the fields of (i) Advanced oxidation technologies for water treatment, (ii) drinking water treatment and purification, (iii) physicochemical phenomena on particle-water interfaces, (iv) transition-metal oxidation and reverse electron transfer reactions, (v) the use of ionic liquids in environmental applications, (vi) destruction of biological toxins in water, and (vii) environmental nanotechnology (fundamental, fate, transport, and applications of nanomaterials).  At the University of Cincinnati, Professor Dionysiou teaches graduate courses in the fields of (i) Advanced Unit Operations for the Treatment of Drinking Water and Wastewater, (ii) Physical-Chemical Processes for Water Quality Control, and (iii) Advanced Oxidation Technologies and Nanotechnologies. He also teaches a graduate level laboratory course on Unit Operations and Process Monitoring for the Treatment of Polluted Water and Air and an undergraduate course in Environmental Engineering Fundamentals and Process Design.


Representative Published Works

Published and In Press Available On-Line


1.                  Yong Cai Zhang, Jing Li, Ming Zhang, and Dionysios D. Dionysiou, Size-Tunable Hydrothermal Synthesis of SnS2 Nanocrystals with High Performance in Visible Light-Driven Photocatalytic Reduction of Aqueous Cr(VI), Environmental Science and Technology, In Press, Available On-Line ASAP, October 4, 2011.


2.                  Changseok Han, Miguel Pelaez, Vlassis Likodimos, Athanassios G. Kontos, Polycarpos Falaras, Kevin O'Shea, and Dionysios D. Dionysiou, Innovative Visible Light-activated Sulfur doped TiO2 for Water Treatment, Applied Catalysis B: Environmental, Applied Catalysis B:Environmental 107 (1/2) (2011) 77-87.


3.                  Stephen P. Mezyk, Kimberly A. Rickman, Garrett McKay, Charlotte M. Hirsch, Xuexiang He, and Dionysios D. Dionysiou, Remediation of Chemically-Contaminated Waters Using Sulfate Radical Reactions: Kinetic Studies, ACS Symposium Series 1071 (Aquatic Redox Chemistry, Eds. Paul G. Tratnyek, Timothy J. Grundl, and Stefan B. Haderlein), Chapter 12, (2011) 247-263.


4.                  D. H. Metz, M. Meyer, A. Dotson, E. Beerendonk and D. D. Dionysiou, The Effect of UV/H2O2 Treatment on THM and HAA Formation Potential under Simulated Distribution System Conditions, Water Research 45 (13) (2011) 3969-3980.


5.                  Miguel Pelaez, Armah A. de la Cruz, Kevin E. O’Shea, Polycarpos Falaras, and Dionysios D. Dionysiou, Effects of Water Parameters on the Degradation of Microcystin-LR under Visible Light-activated TiO2 Photocatalyst, Water Research 45 (12) (2011) 3787-3796.


6.                  Yong Cai Zhang, Zhen Ni Du, Kunwei Li, Ming Zhang, Dionysios D. Dionysiou, High Performance Visible Light-Driven SnS2/SnO2 Nanocomposite Photocatalyst Prepared via In-Situ Hydrothermal Oxidation of SnS2 Nanoparticles,ACS Applied Materials & Interfaces3 (5) (2011) 1528-1537.


7.                  Yongjun Chen, Suzanne K. Lunsford, Yongcheng Song, Huangxian Ju, Polycarpos Falaras, Vlassis Likodimos, Athanassios G. Kontos, and Dionysios. D. Dionysiou, Synthesis, Characterization and Electrochemical Properties of Mesoporous Zirconia Nanomaterials Prepared by Self-assembling Sol-Gel Method with Tween 20 as a Template, Chemical Engineering Journal 170 (2/3) (2011) 518-524.


8.                  Lin Chen, Dionysios D. Dionysiou, and Kevin O’Shea, Removal of Microcystin from Aqueous Solution by Cyclodextrin Complex, Environmental Science and Technology 45 (6) (2011) 2293–2300.


9.                  A. G. Kontos, M. Pelaez, V. Likodimos, N. Vaenas, D. D. Dionysiou, and P. Falaras, Visible and UV Light-Induced Wetting of Nanostructured N-F co-doped Titania Films, Photochemical & Photobiological Sciences 10 (3) (2011), 350-354.


10.              B. Subramanian, S. Y. Christou, V. Namboodiri, A. M. Efstathiou, and D. Dionysiou, Regeneration of Three-Way Automobile Catalysts using Biodegradable Metal Chelating Agent – S, S- Ethylenediamine Disuccinic Acid (S, S-EDDS), Journal of Hazardous Materials 186 (2/3) (2011) 999-1006.


11.              Erick R. Bandala, Liliana González, Felipe de la Hoz, Miguel A. Pelaez, Dionysios D. Dionysiou, Patrick S.M. Dunlop, J. Anthony Byrne, Jose Luis Sanchez, Application of Azo Dyes as Dosimetric Indicators for Enhanced Photocatalytic Solar Disinfection (ENPHOSODIS), Journal of Photochemistry and Photobiology A-Chemistry 218 (2/3) (2011), 185-191.


12.              D. H. Metz, K. Reynolds, M. Meyer and D. D. Dionysiou, The Effect of UV/H2O2 Treatment on Biofilm Formation Potential, Water Research 45 (2) (2011) 497-508.


13.              Armah A. de la Cruz, Maria G. Antoniou, Miguel Pelaez, Anastasia Hiskia, Weihua Song, Kevin E. O'Shea, Xuexiang He and Dionysios D. Dionysiou, Can we Effectively Degrade Microcystins? - Implications for Impact on Human Health Status, Anti-Cancer Agents in Medicinal Chemistry 11 (1) (2011) 19-37.


14.              Maria G. Antoniou, Armah A. de la Cruz, and Dionysios D. Dionysiou, Intermediates and Reaction Pathways from the Degradation of Microcystin-LR with Sulfate Radicals, Environmental Science and Technology 44 (19) (2010) 7238-7244.


15.              Miguel Pelaez, Polycarpos Falaras, Vlassis Likodimos, Athanassios G. Kontos, Armah A. de la Cruz, Kevin O’Shea and Dionysios D. Dionysiou, Synthesis, Structural Characterization and Evaluation of Sol-gel-based NF-TiO2 Films with Visible Light-Photoactivation for the Removal of Microcystin-LR, Applied Catalysis B: Environmental 99 (3/4) (2010) 378-387.


16.              N. Lagopati, P. V. Kitsiou , A. I. Kontos, P. Venieratos, E. Kotsopoulou, A. G. Kontos, D. D. Dionysiou, E. C. Tsilibary and P. Falaras, Photo-induced cancer Treatment using Nanostructured Titanium Dioxide Solution, Journal of Photochemistry and Photobiology A: Chemistry 214 (2/3) (2010) pp. 215-223.


17.              Vlassis Likodimos, Dionysios D. Dionysiou, and Polycarpos Falaras, CLEAN WATER: Water Detoxification Using Innovative Photocatalysts, Reviews in Environmental Science and Bio/Technology 9 (2) (2010) 87-94.


18.              Maria G. Antoniou, Armah A. de la Cruz, and Dionysios D. Dionysiou, Degradation of Microcystin-LR using Sulfate Radicals Generated Through Photolysis, Thermolysis, and Electron Transfer Mechanisms, Applied Catalysis B: Environmental 96 (3/4) (2010) 290-298.


19.              Natalia Quici, María L. Vera, Hyeok Choi, Gianluca Li Puma, Dionysios D. Dionysiou, Marta I. Litter, and Hugo Destaillats, Effect of Key Parameters on the Photocatalytic Oxidation of Toluene at Low Concentrations in Air under 254 + 185 nm UV Irradiation, Applied Catalysis B: Environmental 95 (3/4) (2010) 312-319.


20.              Gautham Jegadeesan, Souhail R. Al-Abed, Vijayakumar Sundaram, Hyeok Choi, Kirk G. Scheckel and Dionysios D. Dionysiou, Spectroscopic Investigation of Arsenic Adsorption and As (III) Oxidation on Amorphous TiO2 Nanoparticles, Water Research 44 (3) (2010) 965-973.


21.              Valeria Puddu, Hyeok Choi, Dionysios D. Dionysiou, and Gianluca Li Puma, TiO2 Photocatalyst for Indoor Air Remediation: Influence of Crystallinity, Crystal Phase, and UV Radiation Intensity on Trichloroethylene Degradation, Applied Catalysis B: Environmental 94 (3/4) (2010) 211-218.


22.              Bhargavi Subramanian, Vasudevan Namboodiri, Amid P. Khodadoust, Dionysios D. Dionysiou, Extraction of Pentachlorophenol from Soils using Environmentally Benign Lactic Acid Solutions, Journal of Hazardous Materials 174 (1-3) (2010) 263-269.



Representative Research Projects


Competitive Federal Projects and Industry Projects (Including from National Science Foundation)


1.      Visible Light-Activated Mixed Anatase/Brookite Heterojunction Titania Photocatalysts For Treatment of Polluted Water, (PI: Adel A. Ismail; PI: Dionysios Dionysiou, 50%/50%), U.S. Department of Agriculture, U.S. - Egypt Joint Research Grants For Collaborative Research Grant, $ 250,000, 6/1/2011-5/30/2013, Summer 5% Effort (Summer: 0.15 months).


2.      “NIREAS International Water Research Center”, (PI. Fatta-Kassinos, Co-PIs, Dionysiou, Christodoulou, Kostarelos, Papanastasiou, Kassinis), The Research Promotion Foundation’s Framework Programme, Cyprus Development Foundation, The Republic of Cyprus, $ 194,400 (out of 1.4 Million Euros total) 1/1/2011-12/31/2015. Summer 1.0 month.


3.      “Collaborative Research: Degradation Mechanism of Cyanotoxins Using Novel Visible Light-Activated Titania (TiO2) Photocatalysts”, (D. D. Dionysiou), National Science Foundation, $ 250,000, 09/01/2010 to 08/31/2013. Effort: Summer 0.5. This is a collaborative proposal between University of Cincinnati, two institutions in Ireland and Florida International University. The overall requested budget is about $ 1 M. Dr. Dionysiou serves as the PI of the whole consortium.


4.      “NUE: Integration of Nanoscale Devices and Environmental Aspects of Nanotechnology into Undergraduate Engineering and Science Curricula”, National Science Foundation, 20% Effort, (PI: J. Boerio; Co-PIs: D. D. Dionysiou, A. Kukreti, V. Shanov, D. Shi) $200,000.00, 4/1/2011-3/31/2013.


5.      “Development of Carbon Nanotube-based Biosensor for Monitoring Microcystin-LR in Water”, Ohio State University Research Foundation, $17,500, 3/1/2011-2/28/2012, 8% Effort (Academic: 0.72 months).


Selected Recent Awards and Honors


·         Inaugural Super Reviewer Award (only three of these internationally in 2011), Environmental Science and Technology (American Chemical Society), 2011.

·         Featured by the Chemistry World magazine, Royal Society of Chemistry, Interview on “Cleaning up water”, , July 5, 2011.

·         Excellence in Review Award, Environmental Science and Technology (American Chemical Society), 2008.

·         AEESP Dissertation Advisor Award for Mentoring Hyeok Choi who was selected as the recipient of the CH2M Hill/AEESP Outstanding Doctoral Dissertation Award for 2008.

·         National Science Foundation CAREER Award, 2005.

·         DuPont Young Professor Award, 2005.

·         Who’s Who in America 2004, The Marquis Who’s Who Publication Board.

·         American Water Works Association’s First Place 2002 Academic Achievement Award for Best Dissertation, 2002.

·         Journal of Environmental Engineering Editor’s Award, American Society of Civil Engineers, 2001.