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Photocatalytic Water Disinfection under Solar Irradiation by d-Glucose-Modified Titania

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Title: Photocatalytic Water Disinfection under Solar Irradiation by d-Glucose-Modified Titania
Authors: Markowska-Szczupak, Agata Browse this author
Rokicka, Paulina Browse this author
Wang, Kunlei Browse this author
Endo, Maya Browse this author
Morawski, Antoni Browse this author
Kowalska, Ewa Browse this author →ORCID
Keywords: C/TiO2
solar radiation
immobilized catalyst
Issue Date: Aug-2018
Publisher: MDPI
Journal Title: Catalysts
Volume: 8
Issue: 8
Start Page: 316
Publisher DOI: 10.3390/catal8080316
Abstract: Modified titania photocatalysts were synthesized by the pressure method using titanium(IV) oxide from Grupa Azoty Zakłady Chemiczne “Police” S.A., Police, Poland, and d-glucose solution. Characterization of obtained composites was performed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), elemental analysis, and measurements of zeta potential and specific surface area (SSA). The possibility of using glucose-titania composites as photocatalysts for simulated solar-assisted disinfection against gram-negative Escherichia coli and gram-positive Stapchyloccocus epidermidis bacteria were examined in two reaction systems, i.e., for suspended and immobilized photocatalysts (on the concrete). It was found that an increase in the d-glucose concentration, i.e., higher carbon content, led to a decrease in antibacterial properties. The sample obtained from 1% of d-glucose solution at 100 °C (TiO2-1%-G-100) showed superior photocatalytic activity under UV-Vis irradiation toward both bacteria species. Water disinfection was more efficient for suspended photocatalyst than that for supported one, where complete disinfection was reached during 55–70 min and 120 min of irradiation, respectively. For the first time, it has been shown that titania modified with monosaccharides can be efficiently used for water disinfection, and the immobilization of photocatalyst on the concrete might be a prospective method for public water supplies.
Type: article
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: Ewa Kowalska

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