Airbrush-sprayed TiO2 layers for the photocatalytic degradation of endocrine disruptors: Performance, stability and applicability

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2025-01-13 DOI:10.1016/j.jphotochem.2025.116271

Barbora Walderova , Adela Paulusova , Lenka Belhacova , Libor Brabec , Petra Cihlarova , Jiri Rathousky , Martin Kuchar

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Abstract

Heterogeneous TiO₂ photocatalysis is an efficient process to be added after standard wastewater treatment to ensure the complete removal of endocrine disruptors, toxic to humans and animals. To address the challenges of industrial-scale operation, an airbrush spraying immobilization method was developed, which provided layers with high stability, reusability, and repeatability. On these layers, an over 50 % conversion after 5 h was achieved for two structurally differing endocrine disrupting chemicals under standardized conditions. The experimental conditions were further optimized; for TiO₂ areal density above 0.8 mg cm⁻², the photocatalytic activity was independent on the used thickness range and proportional to the layer area. The optimization enabled 70 % conversion of 17α-ethinylestradiol after 5 h even when greywater was used as a matrix, with theoretical complete conversion within 24 h. Based on concentrations of identified transformation products of 17α-ethinylestradiol under different experimental conditions, an alternative to the dominant reaction mechanism is proposed.

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.