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Open AccessArticle

Evaluation of the Photocatalytic Activity of a Cordierite-Honeycomb-Supported TiO2 Film with a Liquid–Solid Photoreactor

1
Department of Chemistry and NIS Inter-Departmental Centre, University of Torino, 10125 Torino, Italy
2
Fonderia Mestieri S.r.l, 10093 Collegno TO, Italy
3
Department of Chemistry and G. Scansetti Center, University of Torino, 10125 Torino, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Ming-Chung Wu
Molecules 2019, 24(24), 4499; https://doi.org/10.3390/molecules24244499
Received: 18 November 2019 / Revised: 5 December 2019 / Accepted: 6 December 2019 / Published: 9 December 2019
(This article belongs to the Special Issue Advanced Materials and Technologies for Wastewater Treatment)
Anatase nanoparticles in suspension have demonstrated high photoactivity that can be exploited for pollutant removal in water phases. The main drawback of this system is the difficulty of recovering (and eventually reusing) the nanoparticles after their use, and the possible interference of inorganic salts (e.g., sulfates) that can reduce the performance of the photocatalyst. The present work describes the development of a cordierite-honeycomb-supported TiO2 film to eliminate the problems of catalyst recovery. The catalyst was then tested against phenol in the presence of increasing concentrations of sulfates in a specially developed recirculating modular photoreactor, able to accommodate the supported catalyst and scalable for application at industrial level. The effect of SO42− was evaluated at different concentrations, showing a slight deactivation only at very high sulfate concentration (≥3 g L−1). Lastly, in the framework of the EU project Project Ô, the catalyst was tested in the treatment of real wastewater from a textile company containing a relevant concentration of sulfates, highlighting the stability of the photocatalyst. View Full-Text
Keywords: titanium dioxide; photoreactor; cordierite; sulfates; photocatalysis; wastewater titanium dioxide; photoreactor; cordierite; sulfates; photocatalysis; wastewater
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MDPI and ACS Style

Pellegrino, F.; De Bellis, N.; Ferraris, F.; Prozzi, M.; Zangirolami, M.; Petriglieri, J.R.; Schiavi, I.; Bianco-Prevot, A.; Maurino, V. Evaluation of the Photocatalytic Activity of a Cordierite-Honeycomb-Supported TiO2 Film with a Liquid–Solid Photoreactor. Molecules 2019, 24, 4499.

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