Abstracts Book - IMRC 2018

• SA5-P004
SILICON NANOWIRES/COPPER NANOPARTICLES/SILVER
HETEROJUNCTION FOR METHYL ORANGE DEGRADATION BY
HETEROGENEOUS PHOTOCATALYSIS UNDER VISIBLE
IRRADIATION
María Reina García Robles 1 , José de Jesús Pérez Bueno 1 , Crista Selene Arteaga Syllas 1,2 , Maria
Luisa Mendoza López 3
1 Centro de Investigación y Desarrollo Tecnológico en Electroquímica, Dirección de Ciencia,
Mexico. 2 Universidad Tecnológica de Tula-Tepeji, TSU en Química Área Industrial, Mexico.
3 Instituto Tecnológico de Querétaro, Metalmecánica, Mexico.
The degradation of methyl orange (NM) by direct illumination with visible
radiation (Lambda>420 nm) of a dye solution in the presence of silicon
nanowires (SiNWs) or silicon nanowires with copper nanoparticles (SiNWs-
CuNPs). The SiNWs were synthesized by chemical etching assisted with a metal
(silver) the monocrystalline silicon wafers in an aqueous HF / AgNO3 solution and
the CuNPs were deposited on the silicon by electroless. Discoloration with
visible irradiation of the aqueous methyl orange solution (C14H14N3NaOS) in
the presence of SiNWs produced an efficiency of 80% after 120 minutes of
illumination. The deposition of copper nanoparticles on the nanowires improves
the effectiveness of the photocatalytic reaction that reached 90% of the
discoloration after 120 minutes of exposure to visible light. The photocatalytic
degradation with visible radiation of methyl orange in aqueous solution showed
to be highly efficient in discoloring up to 94% in a time of 150 min in the presence
of SiNWs-CuNPs.
Acknowledgment:
The authors gratefully acknowledge the financial support the National Council
for Science and Technology (CONACYT, Grants CEMIE-Sol No. 207450; LNMG
293371). Also, the first author acknowledges CONACYT for his graduate
fellowship.
Keywords: Silicon nanowires, Photocatalysis, Water remediation
Presenting authors email: jperez@cideteq.mx