Abstracts Book - IMRC 2018

• SF3-O027
OPTIMIZATION OF THE CATALYTIC PHOTODEGRADATION
PROCESS OF PHENOL WITH CeO-ZnO CATALYSTS
Claudia Mart?nez Gomez 1 , Ramon Zarraga Nuñez 1 , Araceli Jacobo Azuara 1 , Emmanuel Castillo
Toxqui 2
1 Universidad de Guanajuato, Departamento de Química, División de Ciencias Naturales y
Exactas, Mexico. 2 CIMAT, Centro de investigación en Matemáticas CIMAT, Unidad
Aguascalientes, Mexico.
Environmental pollution is one of the problems that most concern humanity,
being the pollution of the water one of the most serious problems, due to their
scarcity and to the demographic overexploitation, and even more so when the
different industrial processes in which it is used do not give it proper treatment
before disposing of it, and the different toxic compounds are discarded in rivers
and aquifers, causing various damages to the health, especially of the human.
Within the different toxic compounds that have been found in rivers and
aquifers, 2,4-Dichlorophenoxyacetic acid, which is a very common herbicide, is
used in the control of broad-leaved weeds and reduces grass that prevents
mainly cereals, this is the Third most widely used herbicide in North America,
and the most widely used in the world an classified as carcinogenic 2B by the
EPA. However, there are different processes that study different methods for
their degradation, among which are the Advanced Oxidation Processes (POAs),
which have shown encouraging results, being catalytic photodegradation one of
the most promising, since has been able to degrade 100% different organic and
toxic compounds, for this reason, this work focuses on the study of the catalytic
Photodegradation of 2,4-D, with materials of CeO2-ZnO, since it is TiO2 one of
the Semiconductors most used in this technique, however this material has
some deficiencies, so it is imperative to modify its physicochemical properties
by doping it with other materials, and because CeO2 has demonstrated good
photoactivity, a material that increases the photocatalytic activity due to the
Synergistic effect between ZnO and CeO2, the heat treatment being a crucial
point in its activity. An increase was observed in the specific area, and the Uv
spectra showed a 95% degradation at the characteristic wavelength for 2,4-
dichlorophenoxyacetic acid for the catalyst treated at 400 ° C, and this was
corroborated by the TOC. On the other hand, an optimization was made in the
system to make the activity of the reaction more efficient