Enhanced X-RAYS degradation of methylene blue in the presence of gold microspheres

Maria Molina Higgins; Miguel Toro González; Jessika Rojas

doi:10.1016/j.radphyschem.2018.10.020

Enhanced X-RAYS degradation of methylene blue in the presence of gold microspheres

Maria Molina Higgins
, Miguel Toro González
, Jessika Rojas

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

11 Scopus citations

Abstract

Promising alternatives to increase the degradation of dyes in polluted water are radiation and the addition of particulate materials as catalysts. Specifically, gold particles have demonstrated an enhancement of dye degradation in the presence of UV light and/or reducing agents by increasing the rate at which reactive oxygen species are produced. Herein, the enhanced decomposition of methylene blue (MB) under ionizing radiation, X-rays, in the presence of gold particles was investigated. The influence of X-ray operating voltage, gold particle size distribution, and gold concentration in the degradation of MB was studied. Irradiation of MB was performed at a dose rate of ~35 Gy/min and X-ray irradiator operating voltages of 50 kV, 100 kV, and 225 kV. The presence of spherical gold microparticles enhanced the reaction rate of MB up to 61.7%. Results showed that dye degradation combining ionizing radiation and a catalyst such as gold particles is a promising methodology to accelerate the clean-up process of polluted water resources.

Original language	English
Pages (from-to)	73-80
Number of pages	8
Journal	Radiation Physics and Chemistry
Volume	156
DOIs	https://doi.org/10.1016/j.radphyschem.2018.10.020
State	Published - Mar 2019
Externally published	Yes

Funding

This work was financed by Virginia Commonwealth University (VCU) with the support of the Mechanical and Nuclear Engineering, the VCU Presidential Research Quest Fund (PeRQ), the NRC-HQ-84-14-FOA-002 faculty development program in radiation detection and health physics and, the international fellowship of American Association of University Women (AAUW). This work was financed by Virginia Commonwealth University (VCU) with the support of the Mechanical and Nuclear Engineering, the VCU Presidential Research Quest Fund (PeRQ), the NRC-HQ-84-14-FOA-002 faculty development program in radiation detection and health physics and, the international fellowship of American Association of University Women (AAUW).

Keywords

Dye degradation
Gold particles
Ionizing radiation
Methylene blue
X-rays

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10.1016/j.radphyschem.2018.10.020

Cite this

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title = "Enhanced X-RAYS degradation of methylene blue in the presence of gold microspheres",

abstract = "Promising alternatives to increase the degradation of dyes in polluted water are radiation and the addition of particulate materials as catalysts. Specifically, gold particles have demonstrated an enhancement of dye degradation in the presence of UV light and/or reducing agents by increasing the rate at which reactive oxygen species are produced. Herein, the enhanced decomposition of methylene blue (MB) under ionizing radiation, X-rays, in the presence of gold particles was investigated. The influence of X-ray operating voltage, gold particle size distribution, and gold concentration in the degradation of MB was studied. Irradiation of MB was performed at a dose rate of \textasciitilde{}35 Gy/min and X-ray irradiator operating voltages of 50 kV, 100 kV, and 225 kV. The presence of spherical gold microparticles enhanced the reaction rate of MB up to 61.7\%. Results showed that dye degradation combining ionizing radiation and a catalyst such as gold particles is a promising methodology to accelerate the clean-up process of polluted water resources.",

keywords = "Dye degradation, Gold particles, Ionizing radiation, Methylene blue, X-rays",

author = "\{Molina Higgins\}, Maria and \{Toro Gonz{\'a}lez\}, Miguel and Jessika Rojas",

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year = "2019",

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doi = "10.1016/j.radphyschem.2018.10.020",

language = "English",

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T1 - Enhanced X-RAYS degradation of methylene blue in the presence of gold microspheres

AU - Molina Higgins, Maria

AU - Toro González, Miguel

AU - Rojas, Jessika

PY - 2019/3

Y1 - 2019/3

N2 - Promising alternatives to increase the degradation of dyes in polluted water are radiation and the addition of particulate materials as catalysts. Specifically, gold particles have demonstrated an enhancement of dye degradation in the presence of UV light and/or reducing agents by increasing the rate at which reactive oxygen species are produced. Herein, the enhanced decomposition of methylene blue (MB) under ionizing radiation, X-rays, in the presence of gold particles was investigated. The influence of X-ray operating voltage, gold particle size distribution, and gold concentration in the degradation of MB was studied. Irradiation of MB was performed at a dose rate of ~35 Gy/min and X-ray irradiator operating voltages of 50 kV, 100 kV, and 225 kV. The presence of spherical gold microparticles enhanced the reaction rate of MB up to 61.7%. Results showed that dye degradation combining ionizing radiation and a catalyst such as gold particles is a promising methodology to accelerate the clean-up process of polluted water resources.

AB - Promising alternatives to increase the degradation of dyes in polluted water are radiation and the addition of particulate materials as catalysts. Specifically, gold particles have demonstrated an enhancement of dye degradation in the presence of UV light and/or reducing agents by increasing the rate at which reactive oxygen species are produced. Herein, the enhanced decomposition of methylene blue (MB) under ionizing radiation, X-rays, in the presence of gold particles was investigated. The influence of X-ray operating voltage, gold particle size distribution, and gold concentration in the degradation of MB was studied. Irradiation of MB was performed at a dose rate of ~35 Gy/min and X-ray irradiator operating voltages of 50 kV, 100 kV, and 225 kV. The presence of spherical gold microparticles enhanced the reaction rate of MB up to 61.7%. Results showed that dye degradation combining ionizing radiation and a catalyst such as gold particles is a promising methodology to accelerate the clean-up process of polluted water resources.

KW - Dye degradation

KW - Gold particles

KW - Ionizing radiation

KW - Methylene blue

KW - X-rays

UR - https://www.scopus.com/pages/publications/85056170822

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DO - 10.1016/j.radphyschem.2018.10.020

M3 - Article

AN - SCOPUS:85056170822

SN - 0969-806X

VL - 156

SP - 73

EP - 80

JO - Radiation Physics and Chemistry

JF - Radiation Physics and Chemistry

ER -

Enhanced X-RAYS degradation of methylene blue in the presence of gold microspheres

Abstract

Funding

Keywords

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