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Open AccessFeature PaperArticle

Au and AuCu Nanoparticles Supported on SBA-15 Ordered Mesoporous Titania-Silica as Catalysts for Methylene Blue Photodegradation

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Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain
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Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, National Interuniversity Consortium of Materials Science and Technology (INSTM) Venice Research Unit, Via Torino 155/B, 30172 Mestre Venezia, Italy
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Authors to whom correspondence should be addressed.
Materials 2018, 11(6), 890; https://doi.org/10.3390/ma11060890
Received: 2 May 2018 / Revised: 18 May 2018 / Accepted: 22 May 2018 / Published: 25 May 2018
(This article belongs to the Special Issue Mesoporous Silica Catalysts)
The photocatalytic degradation of methylene blue (MB) dye has been performed under UV irradiation in aqueous suspension, employing photocatalysts based on Au (1.5 wt %) and AuCu (Au/Cu = 1, 2.0 wt %), and supported on SBA-15-ordered mesoporous silica, with and without titania (Si/Ti = 3), in order to evaluate the versatility of this mesoporous support in this type of reaction of great impact from the environmental point of view. Samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N2 adsorption-desorption at −196 °C, and X-ray photoelectron spectroscopy (XPS), so as to study their structural, optical, and chemical properties. All the prepared catalysts were found to be active in the test reaction. The bimetallic AuCu-based catalysts attained very high MB degradation values, in particular AuCu/SBA-15 titania-silica sample reached 100% of dye oxidation after the monitored reaction period (120 min). View Full-Text
Keywords: pollutant degradation; methylene blue; photocatalysis; SBA-15 mesoporous silica; nanoparticles (NPs); Au NPs; AuCu NPs pollutant degradation; methylene blue; photocatalysis; SBA-15 mesoporous silica; nanoparticles (NPs); Au NPs; AuCu NPs
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Barroso-Martín, I.; Moretti, E.; Talon, A.; Storaro, L.; Rodríguez-Castellón, E.; Infantes-Molina, A. Au and AuCu Nanoparticles Supported on SBA-15 Ordered Mesoporous Titania-Silica as Catalysts for Methylene Blue Photodegradation. Materials 2018, 11, 890.

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