Abstracts Book - IMRC 2018

• SF5-P105
SYNTHESIS OF NANOCOMPOSITES BASED ON GRAPHENE-TIN
OXIDE AND ITS APPLICATION IN PHOTOCATALYSIS
Horacio Edgardo Garrafa Gálvez 1 , Clemente Guadalupe Alvarado Beltrán 1 , Victor Manuel
Orozco Carmona 2 , Angelica Garzón Fontecha 3 , Priscy Alfredo Luque Morales 4 , Andrés Castro
Beltrán 5
1 Universidad Autónoma de Sinaloa, Posgrado en Ciencias de la Ingenieria, Mexico. 2 Centro de
Investigación en Materiales Avanzados, S.C., Integridad y Diseño de Materiales Compuestos,
Mexico. 3 Universidad Nacional Autónoma de México, Centro de Nanociencias y
Nanotecnología, Mexico. 4 Universidad Autónoma de Baja California, Facultad de Ingeniería
Arquitectura y Diseño, Mexico. 5 Universidad Autónoma de Sinaloa, Posgrado en Ciencias de la
Ingeniería, Mexico.
Tin oxide (SnO 2 ) is a material that adopts a structure of tetragonal shape, that
is, structure of layers with four square tin atoms pyramidal, is formed by a tin
atom and two oxygen atoms. SnO 2 is a compound widely used in technological
applications, such as gas sensors, in the manufacture of varistors, transparent
conductors, electrocatalytic electrodes, photovoltaic cells, as photocatalyst,
among others; this is possible because of its high refractive index and its
transparency in the visible range due to its high bandgap (around 3.6eV). This
has received great attention as photocatalytic material, in addition, due to its
high thermal stability and no toxicity, it is considered a promising candidate for
its application in the elimination of contaminants in water. But its application in
photocatalysis has certain drawbacks which affect its efficiency, one of which is
the rapid recombination of the electron-hole pair. In order to counteract this
problem, the addition of graphene is proposed, which acts as an electron
acceptor, thus achieving the delay of recombination of the electron-hole pair.
The synthesis of the nanocomposites was carried out using tin chloride as a
precursor of SnO 2 and graphene oxide (GO) as a precursor of graphene,
different solutions of GO-SnO2 were prepared, poured into teflon autoclaves of
120ml and put in an oven at 200°C for 6hr. The obteined nanocomposites were
dried to the environment and ground to later be analyzed by FTIR and XPS to
determine their chemical composition, as well as by Raman and DRX to
determine the formation of the nanocomposites, TEM to analyze their
morphology and UV-vis to determine its optical properties. On the other hand,
the photocatalytic study of the nanocomposites for the degradation of the
methylene blue dye (MB) under irradiation with UV light was carried out,
achieving a degradation of 100% of the MB in half of the time obtained by the
pure SnO 2 .