El Seminario de Investigación Richard Feynman del CULagos les hace una cordial invitación para asistir a la conferencia:
Título: New frontiers in materials science brought by the chemical and nanostructure of graphite oxide
Ponente: Dr. Tamás Szabó, Profesor del Departamento de Físico-Química y Ciencia de Materiales, Universidad de Szeged, Hungría
Lugar: Sala Audiovisual de la Biblioteca, Centro Universitario de los Lagos, UdeG
Fecha y Hora: Miércoles 22 de octubre de 2014, a las 12:00 p.m.
Resumen de la plática:
Graphite oxide (GO) is a non-stoichiometric graphite compound with layered structure, which is prepared by very strong oxidation of graphite. Upon oxidation, the original structure greatly transforms, which results in a concomitant drastic change in the physicochemical properties. The incorporation of hydrogen- and oxygen-containing functional groups make the GO layers hydrophilic, therefore it show similarities with other layered materials such as clays. Another consequence is that part of the hydrogen-containing species can undergo protolytic dissociation in aqueous media rendering GO acidic and cation exchange properties. These characterisitcs make GO a very good adsorbent and solid host for intercalation of molecules. All in all, graphite oxide can be considered as a „hydrophylic graphite” that can be disaggregated well to individual layers, which may be exploited in a vast number of advanced applications involving preparation of membranes e.g. for the measurement of partial pressure of water or desalination of water by reverse osmosis, Li-batteries, catalyst supports, electrochemical sensors for biorelevent applications or transparent conductive electrodes in solar cells or microelectronics, etc.
In the present talk the basic structural and colloidal properties of GO dispersions will be discussed with some selected examples of their application in materials science.
