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Article

Gas-Phase TiO2 Photosensitized Mineralization of Some VOCs: Mechanistic Suggestions through a Langmuir–Hinshelwood Kinetic Approach

1
Dipartimento di Ingegneria Civile ed Ambientale, Università di Perugia, Via G. Duranti 93, 06125 Perugia, Italy
2
Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
*
Author to whom correspondence should be addressed.
Catalysts 2021, 11(1), 20; https://doi.org/10.3390/catal11010020
Received: 18 November 2020 / Revised: 21 December 2020 / Accepted: 24 December 2020 / Published: 26 December 2020
(This article belongs to the Special Issue Recent Advances in TiO2 Photocatalysts)
A jointed experimental and theoretical investigation pointing out new insights about the microscopic mechanism of the volatile organic compounds (VOCs) photocatalytic elimination by TiO2 was done. Methane, hexane, isooctane, acetone and methanol were photomineralized in a batch reactor. Values of K (adsorption constant on TiO2) and k (mineralization rate constant) of the five VOCs (treating the kinetic data through a Langmuir–Hinshelwood approach) were determined. Recorded K (in the range of 0.74 × 10−2–1.11 × 10−2 ppm−1) and k (in the range of 1.9–9.9 ppm min−1) values and performed theoretical calculations allowed us to suggest the involvement of an electron transfer step between the VOC and the hole, TiO2(h+), as the rate-determining one. View Full-Text
Keywords: titanium dioxide; oxidation; photocatalysis; VOCs mineralization; Langmuir–Hinshelwood titanium dioxide; oxidation; photocatalysis; VOCs mineralization; Langmuir–Hinshelwood
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MDPI and ACS Style

Bettoni, M.; Falcinelli, S.; Rol, C.; Rosi, M.; Sebastiani, G.V. Gas-Phase TiO2 Photosensitized Mineralization of Some VOCs: Mechanistic Suggestions through a Langmuir–Hinshelwood Kinetic Approach. Catalysts 2021, 11, 20. https://doi.org/10.3390/catal11010020

AMA Style

Bettoni M, Falcinelli S, Rol C, Rosi M, Sebastiani GV. Gas-Phase TiO2 Photosensitized Mineralization of Some VOCs: Mechanistic Suggestions through a Langmuir–Hinshelwood Kinetic Approach. Catalysts. 2021; 11(1):20. https://doi.org/10.3390/catal11010020

Chicago/Turabian Style

Bettoni, Marta; Falcinelli, Stefano; Rol, Cesare; Rosi, Marzio; Sebastiani, Giovanni V. 2021. "Gas-Phase TiO2 Photosensitized Mineralization of Some VOCs: Mechanistic Suggestions through a Langmuir–Hinshelwood Kinetic Approach" Catalysts 11, no. 1: 20. https://doi.org/10.3390/catal11010020

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