Application of photoactive electrospun nanofiber materials with immobilized meso-tetraphenylporphyrin for parabens photodegradation

0443213 - ÚACH 2016 RIV NL eng J - Journal Article
Gmurek, M. - Bizukojc, M. - Mosinger, Jiří - Ledakowicz, S.
Application of photoactive electrospun nanofiber materials with immobilized meso-tetraphenylporphyrin for parabens photodegradation.
Catalysis Today. Roč. 240, FEB (2015), s. 160-167. ISSN 0920-5861. E-ISSN 1873-4308
Institutional support: RVO:61388980
Keywords : Esters of p-hydroxybenzoic acid * Langmuir-Hinshelwood model * Heterogeneous photosensitized oxidation * Molecular singlet oxygen * Photoactive materials
Subject RIV: CA - Inorganic Chemistry
Impact factor: 4.312, year: 2015

The pollution of aqueous environment by trace amounts of anthropogenic chemical substances has a hazardous impact on regular development of plants and animals as well as on human health. The paper presents the results of studies on the heterogeneous degradation of butyl- and benzylparaben in aqueous solutions using photochemically catalyzed processes. Meso-tetraphenylporphyrin (TPP) was immobilized in the polyurethane nanofiber material by electro-spinning method. The xenon lamp was used as a simulated sunlight source. The influence of various process parameters on reaction rate was investigated. The reuse of the carrier with the immobilized photosensitizer was examined. The major role of the singlet oxygen ((1)Delta(g)) during the photodegradation was proved by using sodium azide and radical scavengers. The adsorption isotherms of parabens onto nanofiber material were determined using BET model. The kinetic study showed that the heterogeneous photodegradation of parabens could be modeled using Langmuir-Hinshelwood model and rate constants have been reported. The reaction pathway for the photodegradation of parabens via (1)Delta(g) was proposed.
Permanent Link: http://hdl.handle.net/11104/0245964