Complete oxidation of egg albumin on photoirradiated TiO2: Factors determining catalytic performance in solid-solid heterogeneous systems

Akito Kawanami; Hisahiro Einaga; Yasutake Teraoka

doi:10.1007/s11164-011-0295-x

Complete oxidation of egg albumin on photoirradiated TiO₂: Factors determining catalytic performance in solid-solid heterogeneous systems

Akito Kawanami, Hisahiro Einaga, Yasutake Teraoka

Functional Materials Science

Research output: Contribution to journal › Article

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Abstract

Solid-solid heterogeneous photooxidation of egg albumin with TiO ₂ was carried out under near UV-light irradiation (λ > 370 nm) and the oxidation behavior was investigated. Egg albumin was photooxidized to form CO₂ without evolution of CO and organic byproducts. The activity for TiO₂-catalyzed albumin photooxidation strongly depended on the albumin and TiO₂ mixing conditions, indicating that the contact conditions between TiO₂ and albumin were important for complete oxidation of albumin. In-situ diffuse reflectance FTIR studies revealed that the peptide bond of albumin was decomposed with the alkyl side chains and that decomposition of the peptide bond followed pseudo first-order kinetics.

Original language	English
Pages (from-to)	587-598
Number of pages	12
Journal	Research on Chemical Intermediates
Volume	37
Issue number	6
DOIs	https://doi.org/10.1007/s11164-011-0295-x
Publication status	Published - Jul 1 2011

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All Science Journal Classification (ASJC) codes

Chemistry(all)

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Kawanami, A., Einaga, H., & Teraoka, Y. (2011). Complete oxidation of egg albumin on photoirradiated TiO₂: Factors determining catalytic performance in solid-solid heterogeneous systems. Research on Chemical Intermediates, 37(6), 587-598. https://doi.org/10.1007/s11164-011-0295-x

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AB - Solid-solid heterogeneous photooxidation of egg albumin with TiO 2 was carried out under near UV-light irradiation (λ > 370 nm) and the oxidation behavior was investigated. Egg albumin was photooxidized to form CO2 without evolution of CO and organic byproducts. The activity for TiO2-catalyzed albumin photooxidation strongly depended on the albumin and TiO2 mixing conditions, indicating that the contact conditions between TiO2 and albumin were important for complete oxidation of albumin. In-situ diffuse reflectance FTIR studies revealed that the peptide bond of albumin was decomposed with the alkyl side chains and that decomposition of the peptide bond followed pseudo first-order kinetics.

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10.1007/s11164-011-0295-x