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

被引：16

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 42 条

[31] A 5TH-ORDER PERTURBATION COMPARISON OF ELECTRON CORRELATION THEORIES [J].

RAGHAVACHARI, K ;

TRUCKS, GW ;

POPLE, JA ;

HEADGORDON, M .

CHEMICAL PHYSICS LETTERS, 1989, 157 (06) :479-483

[32] TiO2 photocatalyst for removal of volatile organic compounds in gas phase - A review [J].

Shayegan, Zahra ;

Lee, Chang-Seo ;

Haghighat, Fariborz .

CHEMICAL ENGINEERING JOURNAL, 2018, 334 :2408-2439

[33] Photocatalytic degradation of acetone and butane on mesoporous titania layers [J].

Stengl, Vaclav ;

Houskova, Vendula ;

Bakardjieva, Snejana ;

Murafa, Nataliya .

NEW JOURNAL OF CHEMISTRY, 2010, 34 (09) :1999-2005

[34] AB-INITIO CALCULATION OF VIBRATIONAL ABSORPTION AND CIRCULAR-DICHROISM SPECTRA USING DENSITY-FUNCTIONAL FORCE-FIELDS [J].

STEPHENS, PJ ;

DEVLIN, FJ ;

CHABALOWSKI, CF ;

FRISCH, MJ .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (45) :11623-11627

[35] A Review of Photocatalysts Prepared by Sol-Gel Method for VOCs Removal [J].

Tseng, Ting Ke ;

Lin, Yi Shing ;

Chen, Yi Ju ;

Chu, Hsin .

INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, 2010, 11 (06) :2336-2361

[36] TiO2 photocatalysis for the degradation of pollutants in gas phase: From morphological design to plasmonic enhancement [J].

Verbruggen, Sammy W. .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS, 2015, 24 :64-82

[37] Volatile organic compounds in indoor environment and photocatalytic oxidation: State of the art [J].

Wang, Shaobin ;

Ang, H. M. ;

Tade, Moses O. .

ENVIRONMENT INTERNATIONAL, 2007, 33 (05) :694-705

[38] Photocatalytic activity of the calcined H-titanate nanowires for photocatalytic oxidation of acetone in air [J].

Yu, Huogen ;

Yu, Jiaguo ;

Cheng, Bei .

CHEMOSPHERE, 2007, 66 (11) :2050-2057

[39] Enhancing effects of water content and ultrasonic irradiation on the photocatalytic activity of nano-sized TiO2 powders [J].

Yu, JC ;

Yu, JG ;

Zhang, LZ ;

Ho, WK .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2002, 148 (1-3) :263-271

[40] Effects of acidic and basic hydrolysis catalysts on the photocatalytic activity and microstructures of bimodal mesoporous titania [J].

Yu, JG ;

Yu, JC ;

Leung, MKP ;

Ho, WK ;

Cheng, B ;

Zhao, XJ ;

Zhao, JC .

JOURNAL OF CATALYSIS, 2003, 217 (01) :69-78

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