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Photochemical and photocatalytic degradation of gaseous toluene using short-wavelength UV irradiation with TiO2 catalyst: comparison of three UV sources.
Chemosphere. 2004 Nov; 57(7):663-71.C

Abstract

The feasibility of the use of short-wavelength UV (254+185 nm) irradiation and TiO2 catalyst for photodegradation of gaseous toluene was evaluated. It was clear that the use of TiO2 under 254+185 nm light irradiation significantly enhanced the photodegradation of toluene relative to UV alone, owed to the combined effect of photochemical oxidation in the gas phase and photocatalytic oxidation on TiO2. The photodegradation with 254+185 nm light irradiation was compared with other UV wavelengths (365 nm (black light blue lamp) and 254 nm (germicidal UV lamp)). The highest conversion and mineralization were obtained with the 254+185 nm light. Moreover, high conversions were achieved even at high initial concentrations of toluene. Catalyst deactivation was also prevented with the 254+185 nm light. Regeneration experiments with the deactivated catalyst under different conditions revealed that reactive oxygen species played an important role in preventing catalyst deactivation by decomposing effectively the less reactive carbon deposits on the TiO2 catalyst. Simultaneous elimination of photogenerated excess ozone and residual organic compounds was accomplished by using a MnO2 ozone-decomposition catalyst to form reactive species for destruction of the organic compounds.

Authors+Show Affiliations

Department of Environmental Science and Human Engineering, Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakura, Saitama 338-8570, Japan.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15488929

Citation

Jeong, Juyoung, et al. "Photochemical and Photocatalytic Degradation of Gaseous Toluene Using Short-wavelength UV Irradiation With TiO2 Catalyst: Comparison of Three UV Sources." Chemosphere, vol. 57, no. 7, 2004, pp. 663-71.
Jeong J, Sekiguchi K, Sakamoto K. Photochemical and photocatalytic degradation of gaseous toluene using short-wavelength UV irradiation with TiO2 catalyst: comparison of three UV sources. Chemosphere. 2004;57(7):663-71.
Jeong, J., Sekiguchi, K., & Sakamoto, K. (2004). Photochemical and photocatalytic degradation of gaseous toluene using short-wavelength UV irradiation with TiO2 catalyst: comparison of three UV sources. Chemosphere, 57(7), 663-71.
Jeong J, Sekiguchi K, Sakamoto K. Photochemical and Photocatalytic Degradation of Gaseous Toluene Using Short-wavelength UV Irradiation With TiO2 Catalyst: Comparison of Three UV Sources. Chemosphere. 2004;57(7):663-71. PubMed PMID: 15488929.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photochemical and photocatalytic degradation of gaseous toluene using short-wavelength UV irradiation with TiO2 catalyst: comparison of three UV sources. AU - Jeong,Juyoung, AU - Sekiguchi,Kazuhiko, AU - Sakamoto,Kazuhiko, PY - 2003/09/25/received PY - 2004/05/13/revised PY - 2004/05/17/accepted PY - 2004/10/19/pubmed PY - 2005/1/26/medline PY - 2004/10/19/entrez SP - 663 EP - 71 JF - Chemosphere JO - Chemosphere VL - 57 IS - 7 N2 - The feasibility of the use of short-wavelength UV (254+185 nm) irradiation and TiO2 catalyst for photodegradation of gaseous toluene was evaluated. It was clear that the use of TiO2 under 254+185 nm light irradiation significantly enhanced the photodegradation of toluene relative to UV alone, owed to the combined effect of photochemical oxidation in the gas phase and photocatalytic oxidation on TiO2. The photodegradation with 254+185 nm light irradiation was compared with other UV wavelengths (365 nm (black light blue lamp) and 254 nm (germicidal UV lamp)). The highest conversion and mineralization were obtained with the 254+185 nm light. Moreover, high conversions were achieved even at high initial concentrations of toluene. Catalyst deactivation was also prevented with the 254+185 nm light. Regeneration experiments with the deactivated catalyst under different conditions revealed that reactive oxygen species played an important role in preventing catalyst deactivation by decomposing effectively the less reactive carbon deposits on the TiO2 catalyst. Simultaneous elimination of photogenerated excess ozone and residual organic compounds was accomplished by using a MnO2 ozone-decomposition catalyst to form reactive species for destruction of the organic compounds. SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/15488929/Photochemical_and_photocatalytic_degradation_of_gaseous_toluene_using_short_wavelength_UV_irradiation_with_TiO2_catalyst:_comparison_of_three_UV_sources_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(04)00474-6 DB - PRIME DP - Unbound Medicine ER -