Photocatalytic Degradation of the Malachite Green Dye with Simulated Solar Light Using TiO2 Modified with Sn and Eu
Por:
Solis-Casados, D. A., Martinez-Pena, J., Hernandez-Lopez, S., Escobar-Alarcon, L.
Publicada:
1 ago 2020
Resumen:
This work reports on the synthesis of photocatalysts in thin film form
of TiO2 modified with Sn, Eu as well as Sn and Eu simultaneously. The
obtained films were characterized by X-Ray Photoelectron Spectroscopy,
Raman Spectroscopy and Ultraviolet-Visible Spectroscopy, in order to
obtain information on their chemical composition, vibrational features
and optical properties respectively. Chemical composition reveal that
the tin content was close to 4 at.%, whereas the europium content was
approximately 1 at.%. Raman results show that the unmodified material
is crystalline TiO2 in the anatase phase; the Sn addition promotes the
formation of the rutile crystalline phase. Europium incorporation as a
novel modifier produces TiO2 in which a mixture of both crystalline
phases coexists. Optical measurements reveal that the band gap energy
for all samples remains close to 3.4 eV. The photocatalytic activity was
evaluated in the degradation reaction of the Malachite Green dye under
simulated solar light. The most relevant result is that photocatalysts
containing Sn and Eu show higher photocatalytic activity (60% of MG
conversion) than the TiO2 thin film (28% of MG conversion). The main
objective of this work was to investigate the changes produced in the
resulting material due to Sn and Eu incorporation as well as try to
correlate such changes with the corresponding catalytic activity in
terms of the Malachite Green dye conversion degree.
Filiaciones:
Solis-Casados, D. A.:
Univ Autonoma Estado Mexico, Ctr Conjunto Invest Quim Sustentable UAEM UNAM, Toluca, Mexico
UAEMex, Personal Acad Adscrito Fac Quim, Toluca, Mexico
Martinez-Pena, J.:
Univ Autonoma Estado Mexico, Ctr Conjunto Invest Quim Sustentable UAEM UNAM, Toluca, Mexico
UAEMex, Programa Posgrad Ciencia Mat, Fac Quim, Toluca, Mexico
Hernandez-Lopez, S.:
Univ Autonoma Estado Mexico, Lab Desarrollo & Caracterizac Mat Avanzados LIDMA, Fac Quim, UAEMex, Toluca, Mexico
Escobar-Alarcon, L.:
Inst Nacl Invest Nucl, Dept Fis, Carretera Mexico Toluca S-N, Ocoyoacac 52750, Mexico
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