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

共 11 条

[1] Photodestruction of Direct Yellow 11 in aqueous TiO2 suspension: effect of operational parameters on detoxification, Langmuir-Hinshelwood kinetic expression and biodegradability
Khezrianjoo, Sajjad
DESALINATION AND WATER TREATMENT, 2019, 153 : 264 - 278
[2] Photocatalytic oxidation of selected gas-phase VOCs using UV light, TiO2, and TiO2/Pd
Tânia M. Fujimoto
Milena Ponczek
Ursula L. Rochetto
Richard Landers
Edson Tomaz
Environmental Science and Pollution Research, 2017, 24 : 6390 - 6396
[3] Photocatalytic oxidation of selected gas-phase VOCs using UV light, TiO2, and TiO2/Pd
Fujimoto, Tania M.
Ponczek, Milena
Rochetto, Ursula L.
Landers, Richard
Tomaz, Edson
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2017, 24 (07) : 6390 - 6396
[4] Quantitative studies on the heterogeneous gas-phase photooxidation of CO and simple VOCs by air over TiO2
Vorontsov, AV
Savinov, EN
Barannik, GB
Troitsky, VN
Parmon, VN
CATALYSIS TODAY, 1997, 39 (03) : 207 - 218
[5] Gas-phase photocatalytic oxidation of diethyl sulfide over TiO2:: kinetic investigations and catalyst deactivation
Kozlov, DV
Vorontsov, AV
Smirniotis, PG
Savinov, EN
APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 42 (01) : 77 - 87
[6] Photocatalytic Degradation of Different VOCs in the Gas-Phase over TiO2 Thin Films Prepared by Ultrasonic Spray Pyrolysis
Dundar, Ibrahim
Krichevskaya, Marina
Katerski, Atanas
Krunks, Malle
Acik, Ilona Oja
CATALYSTS, 2019, 9 (11)
[7] Defect Chemistry of Er3+-Doped TiO2 and Its Photocatalytic Activity for the Degradation of Flowing Gas-Phase VOCs
Rao, Zepeng
Xie, Xiaofeng
Wang, Xiao
Mahmood, Asad
Tong, Shengrui
Ge, Maofa
Sun, Jing
JOURNAL OF PHYSICAL CHEMISTRY C, 2019, 123 (19): : 12321 - 12334
[8] Kinetic analysis of the photocatalytic degradation of gas-phase 2-propanol under mass transport-limited conditions with a TiO2 film photocatalyst
Ohko, Y
Fujishima, A
Hashimoto, K
JOURNAL OF PHYSICAL CHEMISTRY B, 1998, 102 (10): : 1724 - 1729
[9] Moderate Temperature Treatment of Gas-Phase Volatile Organic Toluene Using NiO and NiO–TiO2 Nano-catalysts: Characterization and Kinetic Behaviors
Fares Almomani
Rahul R. Bhosale
Majeda Khraisheh
Waste and Biomass Valorization, 2021, 12 : 3075 - 3089
[10] Photo-oxidation of some benzylic alcohols sensitized by colloidal TiO2 in CH3CN.: A kinetic mechanistic study through quantum yield determinations
Del Giacco, T
Ranchella, M
Rol, C
Sebastiani, GV
JOURNAL OF PHYSICAL ORGANIC CHEMISTRY, 2000, 13 (11) : 745 - 751

← 1 2 →