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Silver/Silicon nanowires/copper nanoparticles heterojunction for methyl orange degradation by heterogeneous photocatalysis under visible irradiation

Published online by Cambridge University Press:  02 January 2019

María Reina García Robles ,
José de Jesús Pérez Bueno ,
Crista Selene Arteaga Syllas ,
Maria Luisa Mendoza López  and
Federico Manriquez Guerrero
María Reina García Robles
Affiliation:
Centro de Investigación y Desarrollo Tecnológico en Electroquímica S.C., Parque Tecnológico Querétaro s/n, Sanfandila, Pedro Escobedo, Querétaro, 76703, MÉXICO. [email protected];
José de Jesús Pérez Bueno*
Affiliation:
Centro de Investigación y Desarrollo Tecnológico en Electroquímica S.C., Parque Tecnológico Querétaro s/n, Sanfandila, Pedro Escobedo, Querétaro, 76703, MÉXICO. [email protected];
Crista Selene Arteaga Syllas
Affiliation:
Centro de Investigación y Desarrollo Tecnológico en Electroquímica S.C., Parque Tecnológico Querétaro s/n, Sanfandila, Pedro Escobedo, Querétaro, 76703, MÉXICO. [email protected]; Universidad Tecnológica de Tula-Tepeji, Av. Universidad Tecnológica No. 1000, El Carmen, Tula de Allende, Hidalgo, 42830, MÉXICO. [email protected]
Maria Luisa Mendoza López
Affiliation:
Tecnológico Nacional de México, Instituto Tecnológico de Querétaro, Av. Tecnológico s/n Esq. M. Escobedo Col. Centro C.P.76000 Querétaro, Qro. MÉXICO. E-mail: [email protected]
Federico Manriquez Guerrero
Affiliation:
Centro de Investigación y Desarrollo Tecnológico en Electroquímica S.C., Parque Tecnológico Querétaro s/n, Sanfandila, Pedro Escobedo, Querétaro, 76703, MÉXICO. [email protected];
*
*(Email: [email protected])
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Abstract

In this work, the degradation of methyl orange (MO) was analyzed by direct light with visible radiation (λ > 450 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 metal assisted etching from monocrystalline silicon wafers in aqueous HF / AgNO3 solution, and the CuNPs were deposited on the SiNWs via electroless. Discoloration with visible irradiation of aqueous methyl orange solution (C14H14N3NaOS) in the presence of SiNWs showed an efficiency of 71% after 120 min of illumination. The deposition of copper nanoparticles on the nanowires improves the efficiency of the photocatalytic reaction achieving 89% discoloration after 120 min exposure to visible light. The MO photocatalytic degradation with visible radiation in aqueous solution shows to be efficient in discoloration reaching up to 92% in a time of 150 min in the presence of SiNWs-CuNPs.

Keywords

Siwaterphotochemicalnanostructure
Type
Articles
Information
MRS Advances , Volume 3 , Issue 64: International Materials Research Congress XXVII , 2018 , pp. 3933 - 3938
Copyright
Copyright © Materials Research Society 2018 

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References

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