Efficient Photocatalytic Degradation of Norfloxacin in Aqueous Media by Hydrothermally Synthesized Immobilized TiO2/Ti Films with Exposed {001} Facets

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• 作者：Murtaza SayedLuqman Ali Shah ; Javed Ali Khan ; Noor S. Shah ; Jan Nisar ; Hasan M. Khan ; Pengyi Zhang ; Abdur Rahman Khan
• 刊名：Journal of Physical Chemistry A
• 出版年：2016
• 出版时间：December 22, 2016
• 年：2016
• 卷：120
• 期：50
• 页码：9916-9931
• 全文大小：1038K
• ISSN：1520-5215

文摘

In this study, a novel immobilized TiO₂/Ti film with exposed {001} facets was prepared via a facile one-pot hydrothermal route for the degradation of norfloxacin from aqueous media. The effects of various hydrothermal conditions (i.e., solution pH, hydrothermal time (H_T) and HF concentration) on the growth of {001} faceted TiO₂/Ti film were investigated. The maximum photocatalytic performance of {001} faceted TiO₂/Ti film was observed when prepared at pH 2.62, H_T of 3 h and at HF concentration of 0.02 M. The as-prepared {001} faceted TiO₂/Ti films were fully characterized by field-emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD), high resolution transmission electron microscope (HR-TEM), and X-ray photoelectron spectroscopy (XPS). More importantly, the as-prepared {001} faceted TiO₂/Ti film exhibited excellent photocatalytic performance toward degradation of norfloxacin in various water matrices (Milli-Q water, tap water, river water and synthetic wastewater). The individual influence of various anions (SO₄^2–, HCO₃^–, NO₃^–, Cl^–) and cations (K⁺, Ca²⁺, Mg²⁺, Cu²⁺, Na⁺, Fe³⁺) usually present in the real water samples on the photocatalytic performance of as-prepared TiO₂/Ti film with exposed {001} facet was investigated. The mechanistic studies revealed that ^•OH is mainly involved in the photocatalytic degradation of norfloxacin by {001} faceted TiO₂/Ti film. In addition, norfloxacin degradation byproducts were investigated, on the basis of which degradation schemes were proposed.