The role of AuNPs on the photocatalytic degradation enhancement in MoO3-based heterostructures

E. F. Vázquez-Vázquez; H. Rojas-Chávez; Y. M. Hernández-Rodríguez; J. Morales-Bautista; O. E. Cigarroa-Mayorga

doi:10.1016/j.matlet.2021.129464

The role of AuNPs on the photocatalytic degradation enhancement in MoO₃-based heterostructures

E. F. Vázquez-Vázquez, H. Rojas-Chávez, Y. M. Hernández-Rodríguez, J. Morales-Bautista, O. E. Cigarroa-Mayorga

Unidad Profesional Interdisciplinaria de Ingeniería y Tecnologías Avanzadas (UPIITA)

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

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Resumen

In this work, gold nanoparticles (AuNPs) on MoO₃-nanorods (MoO₃-Nr) and MoO₃-micro-rods (MoO₃-Mr) array were directly obtained by thermal oxidation on a Mo foil coated with Au. A highly reproducible heterostructure (MoO₃/AuNPs) array was achieved and the physical properties were studied by X-ray diffraction, electron microscopy, electron diffraction, and Raman spectroscopy. The MoO₃-Nr were obtained with an average diameter of 60.1 nm, while two size distribution of AuNPs were identified: 9.4 nm and 80.1 nm. The MoO₃-Nr/AuNPs arrays were achieved when a temperature ≥700 °C was used. By analyzing methylene blue (MB) degradation, we determined that the photodegradation of MB by MoO₃-Nr/AuNPs follows the step-by-step N-dealkylation path. We observed that AuNPs increase dramatically the degradation efficiency and the photocatalytic reproducibility across MB degradation cycles.

Idioma original	Inglés
Número de artículo	129464
Publicación	Materials Letters
Volumen	290
DOI	https://doi.org/10.1016/j.matlet.2021.129464
Estado	Publicada - 1 may. 2021

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title = "The role of AuNPs on the photocatalytic degradation enhancement in MoO3-based heterostructures",

abstract = "In this work, gold nanoparticles (AuNPs) on MoO3-nanorods (MoO3-Nr) and MoO3-micro-rods (MoO3-Mr) array were directly obtained by thermal oxidation on a Mo foil coated with Au. A highly reproducible heterostructure (MoO3/AuNPs) array was achieved and the physical properties were studied by X-ray diffraction, electron microscopy, electron diffraction, and Raman spectroscopy. The MoO3-Nr were obtained with an average diameter of 60.1 nm, while two size distribution of AuNPs were identified: 9.4 nm and 80.1 nm. The MoO3-Nr/AuNPs arrays were achieved when a temperature ≥700 °C was used. By analyzing methylene blue (MB) degradation, we determined that the photodegradation of MB by MoO3-Nr/AuNPs follows the step-by-step N-dealkylation path. We observed that AuNPs increase dramatically the degradation efficiency and the photocatalytic reproducibility across MB degradation cycles.",

keywords = "MB dealkylation, Methylene blue, MoO Raman shift, MoO/Au heterostructure, Thermal oxidation",

author = "V{\'a}zquez-V{\'a}zquez, {E. F.} and H. Rojas-Ch{\'a}vez and Hern{\'a}ndez-Rodr{\'i}guez, {Y. M.} and J. Morales-Bautista and Cigarroa-Mayorga, {O. E.}",

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year = "2021",

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doi = "10.1016/j.matlet.2021.129464",

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TY - JOUR

T1 - The role of AuNPs on the photocatalytic degradation enhancement in MoO3-based heterostructures

AU - Vázquez-Vázquez, E. F.

AU - Rojas-Chávez, H.

AU - Hernández-Rodríguez, Y. M.

AU - Morales-Bautista, J.

AU - Cigarroa-Mayorga, O. E.

PY - 2021/5/1

Y1 - 2021/5/1

N2 - In this work, gold nanoparticles (AuNPs) on MoO3-nanorods (MoO3-Nr) and MoO3-micro-rods (MoO3-Mr) array were directly obtained by thermal oxidation on a Mo foil coated with Au. A highly reproducible heterostructure (MoO3/AuNPs) array was achieved and the physical properties were studied by X-ray diffraction, electron microscopy, electron diffraction, and Raman spectroscopy. The MoO3-Nr were obtained with an average diameter of 60.1 nm, while two size distribution of AuNPs were identified: 9.4 nm and 80.1 nm. The MoO3-Nr/AuNPs arrays were achieved when a temperature ≥700 °C was used. By analyzing methylene blue (MB) degradation, we determined that the photodegradation of MB by MoO3-Nr/AuNPs follows the step-by-step N-dealkylation path. We observed that AuNPs increase dramatically the degradation efficiency and the photocatalytic reproducibility across MB degradation cycles.

AB - In this work, gold nanoparticles (AuNPs) on MoO3-nanorods (MoO3-Nr) and MoO3-micro-rods (MoO3-Mr) array were directly obtained by thermal oxidation on a Mo foil coated with Au. A highly reproducible heterostructure (MoO3/AuNPs) array was achieved and the physical properties were studied by X-ray diffraction, electron microscopy, electron diffraction, and Raman spectroscopy. The MoO3-Nr were obtained with an average diameter of 60.1 nm, while two size distribution of AuNPs were identified: 9.4 nm and 80.1 nm. The MoO3-Nr/AuNPs arrays were achieved when a temperature ≥700 °C was used. By analyzing methylene blue (MB) degradation, we determined that the photodegradation of MB by MoO3-Nr/AuNPs follows the step-by-step N-dealkylation path. We observed that AuNPs increase dramatically the degradation efficiency and the photocatalytic reproducibility across MB degradation cycles.

KW - MB dealkylation

KW - Methylene blue

KW - MoO Raman shift

KW - MoO/Au heterostructure

KW - Thermal oxidation

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DO - 10.1016/j.matlet.2021.129464

M3 - Artículo

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VL - 290

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