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  • 1.
    Di Mauro, Alessandro
    et al.
    CNR-IMM, Via S. Sofia 64, 95123 Catania, Italy.
    Natile, Marta Maria
    Istituto di Chimica della Materia Condensata e Tecnologie per l’Energia, Consiglio Nazionale delle Ricerche (ICMATE-CNR) and Dipartimento di Scienze Chimiche, Università di Padova, Via F. Marzolo 1, 35131 Padova, Italy.
    Landström, Anton
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Concina, Isabella
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
    Ferroni, Matteo
    Department of Information Engineering, University of Brescia, Via Branze, Brescia, Italy. CNR-IMM, Via Gobetti, Bologna, Italy.
    Privitera, Vittorio
    CNR-IMM, Via S. Sofia 64, 95123 Catania, Italy.
    Impellizzeri, Giuliana
    CNR-IMM, Via S. Sofia 64, 95123 Catania, Italy.
    Epifani, Mauro
    CNR-IMM, Via Monteroni c/o Campus Universitario, 73100 Lecce, Italy.
    Visible Light Photodegradation of Dyes and Paracetamol by Direct Sensitization Mechanism onto Metallic MoO2 Nanocrystals2021In: Journal of Photochemistry and Photobiology A: Chemistry, ISSN 1010-6030, E-ISSN 1873-2666, Vol. 413, article id 113258Article in journal (Refereed)
    Abstract [en]

    MoO2 nanocrystals were prepared by solvothermal treatment of a Mo chloromethoxide at 250 °C in oleic acid. The monoclinic MoO2 phase, with a mean crystallite size of 29 nm, formed through reduction of molybdenum bronzes. The as-prepared MoO2 nanocrystals were free from organics, allowing their use in photodegradation tests of organic pollutants (methylene blue, rhodamine B, paracetamol), without any preliminary purification treatment of the nanocrystals. It was found that MoO2 was an efficient adsorbent of methylene blue (43 mg g-1 for 1.5 × 10−4 M concentration) in the dark and an efficient photodegradation catalyst under visible light (all methylene blue removed from the solution after 240 min). From the analysis of the combined photodegradation tests of rhodamine B and paracetamol, it was clarified that direct sensitization was responsible for photodegradation. This finding was related to the work function value of metallic MoO2, placed at more negative values if compared with other metallic materials.

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