Title
Facile synthesis of a TiO2-Al2O3-GnPs compound and its application in the photocatalytic degradation of Diuron
Author
Alina De J. Zurita Yduarte
Diana J. Gallegos Hernández
URIEL ALEJANDRO SIERRA GOMEZ
GLADIS JUDITH LABRADA DELGADO
SALVADOR FERNANDEZ TAVIZON
Pedro Jesús Herrera Franco
SRINIVAS GODAVARTHI
JOSE GILBERTO TORRES TORRES
ADRIAN CERVANTES URIBE
CLAUDIA GUADALUPE ESPINOSA GONZALEZ
Access level
Open Access
Alternative identifier
doi: https://doi.org/10.1016/j.cartre.2022.100213
Subjects
Summary or description
"New ternary materials TiO2-Al2O3-GnPs (TAG) were prepared by using an innocuous sol-gel method with a slight modification for the addition of graphene nanoplatelets (GnPs), under room temperature and atmospheric pressure. The materials TiO2-Al2O3-GnPs were prepared with variations of concentration between 0.05 and 1 wt % of GnPs. In this study, we analyzed the physicochemical properties by X-ray diffraction (XRD) and UV-Vis spectroscopy, textural properties by N2 physisorption, morphology by scanning and transmission electron microscopy (SEM, TEM) and a chemical species analysis was carried out by X-ray photoelectron spectroscopic (XPS). The photocatalytic activity of each material was evaluated in the degradation of a model molecule, Diuron, a carcinogenic and cytotoxic herbicide used in farm fields. To determine reaction selectivity and mineralization degree, the photocatalytic reaction was monitored by using UV-Vis spectroscopy and total organic carbon (TOC). In samples with higher GnPs’ concentration, a good enough specific surface area of up to 379 m2/g was observed, and reduced band gap energy (2.8 eV) with respect to TiO2 and mixed oxide (3.2 and 3.1 eV respectively), was obtained. These resulting properties were the key indicator so that the materials could be applied as photocatalysts. In the photocatalytic activity determination, TAG-0.75 was the sample that showed the best results with respect to the mixed oxide; the highest photocatalytic conversion, the reduced average life time, and increased mineralization and reaction selectivity."
Publisher
Elsevier
Publish date
2022
Publication type
Article
Publication version
Published Version
Information Resource
Format
application/pdf
Citation suggestion
Alina de J. Zurita-Yduarte, Diana J. Gallegos-Hernández, Uriel A. Sierra-Gómez, Gladis J. Labrada-Delgado, Salvador Fernández-Tavizón, Pedro J. Herrera-Franco, Srinivas Godavarthi, José G. Torres-Torres, Adrián Cervantes-Uribe, Claudia G. Espinosa-González, Facile synthesis of a TiO2-Al2O3-GnPs compound and its application in the photocatalytic degradation of Diuron, Carbon Trends, Volume 9, 2022, https://doi.org/10.1016/j.cartre.2022.100213.
Source repository
Repositorio IPICYT
Downloads
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