Decontaminate effect of the functionalized materials with undoped and doped (ag) tio2 nanocrystals

Cornelia Ratiu1, Carmen Lazau1, Paula Sfirloaga1, Corina Orha1, Daniela Sonea2, Stefan Novaconi1, Florica Manea2, Georgeta Burtica2, Ioan Grozescu1

1 National Institute for Research&Development in Electrochemistry and Condensed Matter, 1 Plautius Andronescu Street, 300224 Timisoara, Romania
2 Politehnica University of Timisoara, 2 Victoriei Street, 300006 Timisoara, Romania

Abstract


This paper presents the preliminary results of photocatalytic oxidation of humic acid from water using two types of catalysts, i.e., TiO2 and Ag-doped TiO2 modified zeolite (TMZ and Ag-TMZ). TMZ and Ag-TMZ, with zeolite granulation of 315-500 m was synthesized by sol-gel method, and the morphology and composition of the unmodified/modified zeolite were characterized by BET (Brunauer Emmet Teller) method, X-ray Diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDAX). The sorption process played a major role in photoxidation process, and a slight higher photodegradation rate of humic acid from water was obtained for TiO2 modified zeolite. The photodegradation process of humic acid from water by using catalysts of TiO2 and Ag-doped TiO2 led to a complete mineralization.

Keywords


Ag-doped TiO2-modified zeolite; humic acid removal; photocatalytic oxidation process; TiO2-modified zeolite

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