Assessment of Electrical Properties of the Hybrid Materials TiO2@Zeolite Studied by Photo-Electrical Impedance Spectroscopy

Abstract

Abstract Photocatalytic reactions to degrade organic pollutants from aqueous medium by hybrid materials is a field of high interest in which the solving of the exact electrical conduction mechanism is a challenge. A coherent electrical conduction mechanism was proposed based on data obtained from assisted laser impedance spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy for TiO2@zeolite hybrid materials where the zeolite was synthesized from recycled coal fly ash. The results verified the presence of a Ti3+ state in spherical particles of TiO2, in which the electrical resistance of the entire system increases when the amount of TiO2 increases. The samples with lower capacitive performance allowed a larger transfer of the charges between the solid-liquid interface.