Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/47918
Title: Photodegradation of 2,4-dichlorophenoxyacetic acid over TiO2(B)/anatase nanobelts and Au-TiO2(B)/anatase nanobelts
Authors: Chenchana, A.
Nemamcha, A.
Moumeni, H.
Doña Rodríguez, J. M. 
Araña, J. 
Navío, J. A.
González Díaz, O. 
Pulido Melián, E. 
UNESCO Clasification: 330301 Tecnología de la catálisis
Keywords: Tio2 Nanobelts
Photocatalytic Degradation
Anatase Nanoparticles
Hydrogen-Production
Water, et al
Issue Date: 2019
Publisher: 0169-4332
Project: Eliminacion Fotocatalitica de Mezclas de Nox y Covs en Emisiones Gaseosas Con Ti02 y Oxidos Mixtos. 
Investigación de Las Interacciones de Los Nox Sobre Semiconductores Soportados En 
Sistema Completo de Caracterización de la Relación Entre Composición, Estructura y Fotoactividad de Sólidos Sintéticos Con Aplicaciones Fotocatalíticas. 
Journal: Applied Surface Science 
Abstract: In this work, novel TiO2-based nanobelts with various phases were synthesized: biphasic TiO2(B)/anatase, pure TiO2(B) and pure anatase. These catalysts were obtained via hydrothermal reaction using two nanoparticulated TiO2 photocatalysts as precursors: Aeroxide TiO2 P25 (P25) and TiO2 synthesized via a sol-gel process (SG). In addition, the surface of the photocatalysts was modified with gold using a photodeposition method. A characterization study of the different photocatalysts was performed with X-ray diffraction analysis (XRD), UV-Vis diffuse reflectance spectra (DRS), scanning electron microscopy (SEM), X-ray photoelectron spectrum analysis (XPS) and Brunauer-Emmett-Teller measurements (BET). The photocatalytic reaction of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) was investigated under UVA irradiation. A toxicity analysis was performed with the marine bioluminescent bacteria Vibrio fischeri. The highest 2,4-D removal efficiency of 99.2% was obtained with the biphasic Au-TiOP2 (TiO2(B)/anatase) nanobelts with anatase as predominant phase. Toxicity was mainly due to the intermediate 2,4-dichlorophenol (2,4-DCP) which was eliminated in 4 h. The TiO2 nanobelt phase structure is shown to have a significant effect on photocatalytic activity.
URI: http://hdl.handle.net/10553/47918
ISSN: 0169-4332
DOI: 10.1016/j.apsusc.2018.10.175
Source: Applied Surface Science[ISSN 0169-4332],v. 467-468, p. 1076-1087
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