Abstract
Abstract In order to recycle TiO 2 photocatalysts and prevent TiO 2 from damaging polyvinylidene fluoride (PVDF) films, porous Zr x Si 1− x O 2 shell/void/TiO 2 core particles (Zr-SVTs) were firstly synthesized by the synergistic effect between nonionic surfactant P123 ((EO) 20 (PO) 70 (EO) 20 ) and oleic acid (CH 3 (CH 2 ) 7 CH = CH(CH 2 ) 7 COOH) and cohydrolysis between TEOS and ZrOCl 2 ·8H 2 O, and then embedded them into PVDF to prepare PVDF photocatalytic films (Zr-SVTP films) by phase inversion process. Zr-SVTs were characterized by SEM, TEM and EDX while Zr-SVTP films were characterized by SEM. The preparation condition and recycle of Zr-SVTP films were investigated and determined. The photocatalytic activities of Zr-SVTP films were investigated by cleaning oily wastewater. The results show that Zr-SVTs hold porous characteristic, and Zr-SVTP films perform the better photocatalytic activities compared with PVDF films (SVTP) embed by SiO 2 shell/void/TiO 2 core without doping Zr in SiO 2 shell, this is because the mass transfer inside channels of Zr-SVTs is promoted by Zr x Si 1− x O 2 shell, ensuring the better photocatalytic activities of Zr-SVTP films. Therefore, Zr-SVTP films structure characteristic will have a promising application in recycle of TiO 2 photocatalysts and cleaning oily wastewater.
Published Version
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