Synthesis of Nanocrystalline Titania and Photocatalytic Degradation of Phthalate Esters

Abstract

Abstract: Rutile titania with different shapes(shuttle-like, sphere with needles, uniform particles) was prepared by manipulative hydrolysis of TiCl₄ in aqueous solution with a high acidity in the absence or presence of PEG-1000. The products were characterized by means of XRD, TEM and UV-Vis. As a result, shuttle-like nanocrystalline appeared and the aggregation was improved with the increase of the amount of acid and the decrease of the concentration of TiCl₄ in the absence of PEG-1000. Uniform nanoparticles were obtained in the presence of PEG-1000, and the diameter of the particles decreased with increasing the amount of PEG-1000. The photocatalyzed degradation of phthalate esters in aqueous suspensions of titanium dioxide shows that the synthesized titania has a high photocatalytic activity. The degradation products were analyzed by GC-MS technique and probable pathways for the degradation of PEs were proposed.

Key words: TiO₂, Hydrolysis, Photocatalysis, Phthalate esters

CLC Number:

O643

TrendMD:

CHU Ren-He, YAN Fu-Cheng, YAN Ji-Chang, WANG Yue-Hong, WANG Ying, ZHAO Kai, SHI Jin-E, LI Xiao-Kun, CUI Xiao-Ying, ZHAI Yu-Juan. Synthesis of Nanocrystalline Titania and Photocatalytic Degradation of Phthalate Esters[J]. Chem. J. Chinese Universities, 2005, 26(9): 1695.

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