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4 results on '"Rol, Cesare"'

2. Gas Phase TiO2 Photosensitized Mineralization of some VOCs: Mechanistic Suggestions Through a Langmuir-Hinshelwood Kinetic Approach

Author

Bettoni, Marta, Falcinelli, Stefano, Rol, Cesare, Rosi, Marzio, and Sebastiani, Giovanni Vittorio

Subjects
analytical_chemistry
Abstract

A jointed experimental and theoretical investigation pointing out new insights about the microscopic mechanism of the VOCs (volatile organic compounds) photocatalytic elimination by TiO2 has been done. Methane, hexane, isooctane, acetone and methanol have been 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) have been determined. Recorded K and k 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.

Published
2020

4. Gas-Phase TiO 2 Photosensitized Mineralization of Some VOCs: Mechanistic Suggestions through a Langmuir–Hinshelwood Kinetic Approach.

Author

Bettoni, Marta, Falcinelli, Stefano, Rol, Cesare, Rosi, Marzio, and Sebastiani, Giovanni Vittorio

Subjects
MINERALIZATION, CHARGE exchange, BATCH reactors, VOLATILE organic compounds, TRIMETHYLPENTANE
Abstract

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. [ABSTRACT FROM AUTHOR]

Published
2021
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