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)

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

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.

Original language	English
Article number	129464
Journal	Materials Letters
Volume	290
DOIs	https://doi.org/10.1016/j.matlet.2021.129464
State	Published - 1 May 2021

Keywords

MB dealkylation
Methylene blue
MoO Raman shift
MoO/Au heterostructure
Thermal oxidation

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10.1016/j.matlet.2021.129464

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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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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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U2 - 10.1016/j.matlet.2021.129464

DO - 10.1016/j.matlet.2021.129464

M3 - Artículo

AN - SCOPUS:85101308992

SN - 0167-577X

VL - 290

JO - Materials Letters

JF - Materials Letters

M1 - 129464

ER -

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

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Keywords

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