BEGIN:VCALENDAR VERSION:2.0 PRODID:-//ZContent.net//ZapCalLib 1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VEVENT SUMMARY:Impacts of water being a protonic semiconductor on desalination and renewable energy technologies LOCATION:Chemistry A101 TZID:America/Denver DTSTART:20191101T000000 UID:2026-04-18-04-01-57@natsci.colostate.edu DTSTAMP:20260418T040157 Description:About the Seminar\nProtonic (H+) processes that occur in water in the dark are identical to electronic (e–) processes that occur in sem iconductors in the dark\; for this reason\, my team defines water as a pro tonic semiconductor. Using this fact\, over a half-century ago Prof. John Bockris demonstrated that hydrated bipolar ion-selective membranes can for m ionic diodes. Recently\, my team coupled this discovery with photoacid d ye sensitization to demonstrate photo-iono-chemical energy conversion and photovoltages in excess of 100 mV.1\,3\,4 We observed that this photo-iono -chemical phenomenon is general in that covalent modification of several p olymer scaffolds with several photoacid dye molecules each resulted in a p hotovoltaic response\,1\,5 and have since extended this work to ionic diod es based on doped ice cubes. The photo-responsive polymers form a new clas s of functional materials that upon optical excitation result in changes i n ion concentrations and electrostatic potentials\, which we plan to use t o drive redox reactions and desalination (Figure 1)\, as well as biologica l cellular events. In addition and by analogy to Marcus electron-transfer theory\, these studies have led us to a clear understanding of the driving -force dependence on the rate constants for proton-transfer reactions\, as well as a better understanding of the challenges and solutions to efficie nt generation of clean water. This fundamental knowledge has enabled us to demonstrate the following:\n\n\n Photoacidity in several classes of prop osed photoacid and photobase molecules previously thought to be thermodyna mically incapable of performing excited-state proton transfer\,6\n Enhanc e rates of proton-coupled electron-transfer reactions\,\n Enhanced rates of water dissociation in bipolar membranes\,7\n Electrochemical ratchets\ , where by application of AC electric biases across porous salt-water-perm eated capacitors\, directional DC ion pumping is observed\,8 and\n Energy recycling via heat transport for more effective solar thermal distillatio n.9\n\n\n\nReferences\n\n Ardo\, W. White\, …\, PCT International Paten t Application\, 2018\, US20180065095 A1\, China\, Germany\, Japan\, US.\n Ardo\, D. Fernandez Rivas\, M. Modestino\, V. Schulze Greiving\, … (45 total co-authors)\, Energy &\; Environmental Science\, 2018\, 11\, 2768 \, DOI: 10.1039/c7ee03639f.\n White\, C. D. Sanborn\, R. S. Reiter\, D. M . Fabian &\; S Ardo\, … S Ardo\, Journal of the American Chemical Soc iety\, 2017\, 139\, 11726\, DOI: 10.1021/jacs.7b00974.\n White\, C. D. Sa nborn\, D. M. Fabian &\; S Ardo\, Joule\, 2018\, 2\, 94\, DOI: 10.1016/ j.joule.2017.10.015.\n White\, S. Luo\, R. Bhide\, C. D. Sanborn\, M. S. Baranov\, K. M. Solntsev &\; S Ardo\, Proceedings of SPIE\, 2019\, 1108 4\, 110840E\, DOI: 10.1117/12.2529900.\n Ardo\, R. Bhide\, …\, Provisio nal Patent Application\, 2019\, UC Case Number 2020-319-1.\n Ardo\, W. Wh ite\, …\, Provisional Patent Application\, 2019\, UC Case Number 2019-68 0-1.\n Ardo\, G. Segev\, …\, Provisional Patent Application\, 2019\, UC Case Number 2019-927-1.\n Ardo\, J. M. Cardon\, …\, Provisional Patent Application\, 2019\, UC Case Number 2020-320-1.\n\nAbout the Speaker\nSha ne obtained a B.S. Degree in Mathematics\, with a minor in Computer Progra mming\, from Towson University and subsequently worked as a software engin eer\, community college instructor\, high school teacher\, and tried out f or a professional indoor soccer team\, prior to attending graduate school. Shane obtained an M.S. Degree in Nutrition from the University of Marylan d\, College Park followed by M.A. and Ph.D. Degrees in Photo-Physical Inor ganic Chemistry from the Johns Hopkins University\, where he worked for Pr of. Jerry Meyer. He then worked for Prof. Nate Lewis as a DOE–EERE Postd octoral Research Awardee at the California Institute of Technology until 2 013. Since that time\, Shane has been an Assistant Professor (2013 – 201 9) and now an Associate Professor at the University of California\, Irvine in the Department of Chemistry and holds courtesy joint appointments in t he Departments of Chemical &\; Biomolecular Engineering and Materials S cience &\; Engineering. His group studies Photo…Chemistry\, with the aim to understand and control the kinetics and mechanisms of reactions at interfaces. They do this by designing\, synthesizing\, characterizing\, an d modeling asymmetric molecule–material structures for practical applica tions in desalination\, atmospheric water harvesting\, solar fuels devices \, photovoltaics\, fuel cells\, electrolyzers\, and redox flow batteries. In 2016\, Shane was named one of five inaugural Moore Inventor Fellows. He is also a recipient of a DOE Early Career Research Award and a Beall Inno vation Award\, and was named a Sloan Research Fellow\, a Cottrell Scholar\ , a Kavli Fellow\, and a Scialog Fellow. Shane has given over 100 invited talks\, including at the National Academy of Sciences Distinctive Voices L ecture Series\, the 2017 Resnick Institute Young Investigators Symposium\, and Apple’s Membrane R&\;D Division. His research group is also supp orted by funding from the U.S. Department of Energy’s Office of Energy E fficiency and Renewable Energy\, the U.S. National Science Foundation’s Chemical Catalysis Program\, Nissan Chemical Corporation\, and collaborati ve projects funded by University of California MEXUS–CONACYT\, Research Corporation for Science Advancement\, and UC Irvine’s Research Seed Fund ing Program. His research group is also part of the recently announced DOE Energy–Water Desalination Hub.\n \; 4:00 pm END:VEVENT END:VCALENDAR