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

被引：15

作者：

Bettoni, Marta ^{[1
]}

Falcinelli, Stefano ^{[1
]}

Rol, Cesare ^{[2
]}

Rosi, Marzio ^{[1
]}

Sebastiani, Giovanni Vittorio ^{[1
]}

机构：

[1] Univ Perugia, Dipartimento Ingn Civile & Ambientale, Via G Duranti 93, I-06125 Perugia, Italy

[2] Univ Perugia, Dipartimento Chim Biol & Biotecnol, Via Elce di Sotto 8, I-06123 Perugia, Italy

来源：

CATALYSTS | 2021年 / 11卷 / 01期

关键词：

titanium dioxide; oxidation; photocatalysis; VOCs mineralization; Langmuir– Hinshelwood; VOLATILE ORGANIC-COMPOUNDS; PHOTOCATALYTIC DEGRADATION; ELECTRON CORRELATION; BASIS-SETS; OXIDATION; ACETONE; TOLUENE; WATER;

D O I：

10.3390/catal11010020

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 x 10(-2)-1.11 x 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.

引用

页码：1 / 14

页数：14

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