Universal Journal of Chemistry(CEASE PUBLICATION) Vol. 3(4), pp. 104 - 111
DOI: 10.13189/ujc.2015.030402
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Photocatalytic Degradation of β-carotene with TiO₂ and Transition Metal Ions Doped TiO₂ under Visible Light Irradiation

Wei Ge ¹, Yu Chen ¹, Liang Wang ², Ronghua Zhang ^1,3,*
1 Department of Chemistry, Tongji University, China
² Shanghai Tobacco Group Company Ltd., China
³ Shanghai Key Laboratory of Chemical Assessment and Sustainability, China

ABSTRACT

β-carotene, one of the carotenoids, was photodegraded under visible light irradiation by using pure TiO₂ and M-TiO₂ (M= metal; Ag, Fe, Ru). The photocatalysts were prepared by a sol-gel method and incipient wetness impregnation method, and investigated by means of X-ray diffraction and scanning electron microscopy for characterization. The effects of photocatalyst and oxygen content were investigated, which was based on the absorbance at 450 nm of photodegradation of β-carotene as the main index. The study of photocatalytic activity indicated that Ag-doped TiO₂ showed higher photocatalytic activity than other photocatalysts. And also a quick decrease of β-carotene in the presence of oxygen was observed. β-cyclocitral, 5,6-epoxy-β-ionone and dihydroactinidiolide, the main photocatalytic degradation products of β-carotene were confirmed by gas chromatograph-mass spectrometer (GC-MS) analysis. All these degradation products can be used for fragrance and flavoring agents, such as cigarette flavoring ingredients.

KEYWORDS
β-carotene, M-TiO₂, Photocatalytic Degradation, Sol-gel Method, GC-MS Analysis, Cigarette Flavoring

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Wei Ge , Yu Chen , Liang Wang , Ronghua Zhang , "Photocatalytic Degradation of β-carotene with TiO₂ and Transition Metal Ions Doped TiO₂ under Visible Light Irradiation," Universal Journal of Chemistry(CEASE PUBLICATION), Vol. 3, No. 4, pp. 104 - 111, 2015. DOI: 10.13189/ujc.2015.030402.

(b). APA Format:
Wei Ge , Yu Chen , Liang Wang , Ronghua Zhang (2015). Photocatalytic Degradation of β-carotene with TiO₂ and Transition Metal Ions Doped TiO₂ under Visible Light Irradiation. Universal Journal of Chemistry(CEASE PUBLICATION), 3(4), 104 - 111. DOI: 10.13189/ujc.2015.030402.