Influence of Humidity and Acidity of the Titanium Dioxide Surface on the Kinetics of Photocatalytic Oxidation of Volatile Organic Compounds Full article
| Journal |
Russian Chemical Bulletin
ISSN: 1066-5285 , E-ISSN: 1573-9171 |
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| Output data | Year: 2003, Volume: 52, Number: 5, Pages: 1100-1105 Pages count : 6 DOI: 10.1023/A:1024796905146 | ||||
| Tags | Air humidity, Gas phase, Photocatalysis, Surface acidity, Titanium dioxide, Water adsorption | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 02-03-08002 |
| 2 | North Atlantic Treaty Organization | SfP-974309 |
Abstract:
The influence of the humidity and acidity of the TiO2 surface on the kinetics of the photocatalytic processes of deep oxidation of volatile organic compounds was studied. At ∼20 °C the rates of acetone and benzene oxidation are maximum at the coverages of TiO2 with water close to monolayer and are 3—5 times higher than that in the dry atmosphere. The activation energy of benzene oxidation (E a = 6.3±0.4 and 43.0±3.2 kJ mol–1 at relative humidities of 8 and 70%, respectively) at a humidity higher than 30% decreases according to the exponential law with an increase in the surface acidity when multilayer water films are formed on the surface. Under the real conditions of operation of photocatalytic air purifiers, a TiO2 particle is covered by water nanofilms. As in aqueous solutions, photoprocesses on the TiO2 surface depend substantially on the solvation of the participants of the reaction, the formation of the double electric layer, and the concentration of the electrolyte (due to the dissociation of the surface acid-base groups).
Cite:
Kozlov D.V.
, Panchenko A.A.
, Bavy'kin D.V.
, Savinov E.N.
, Smirniotis P.G.
Influence of Humidity and Acidity of the Titanium Dioxide Surface on the Kinetics of Photocatalytic Oxidation of Volatile Organic Compounds
Russian Chemical Bulletin. 2003. V.52. N5. P.1100-1105. DOI: 10.1023/A:1024796905146 WOS Scopus РИНЦ ANCAN OpenAlex
Influence of Humidity and Acidity of the Titanium Dioxide Surface on the Kinetics of Photocatalytic Oxidation of Volatile Organic Compounds
Russian Chemical Bulletin. 2003. V.52. N5. P.1100-1105. DOI: 10.1023/A:1024796905146 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Козлов Д.В.
, Панченко А.А.
, Бавыкин Д.В.
, Савинов Е.Н.
, Смирниотис П.Г.
Влияние влажности и кислотности поверхности диоксида титана на кинетику фотокаталитического окисления паров органических веществ
Известия Академии наук. Серия химическая. 2003. №5. С.1041-1046. РИНЦ
Влияние влажности и кислотности поверхности диоксида титана на кинетику фотокаталитического окисления паров органических веществ
Известия Академии наук. Серия химическая. 2003. №5. С.1041-1046. РИНЦ
Dates:
| Submitted: | Sep 13, 2002 |
| Accepted: | Dec 15, 2002 |
| Published print: | May 1, 2003 |
Identifiers:
| Web of science: | WOS:000185153900007 |
| Scopus: | 2-s2.0-0038167152 |
| Elibrary: | 13431917 |
| Chemical Abstracts: | 2003:542820 |
| Chemical Abstracts (print): | 140:10498 |
| OpenAlex: | W247118715 |