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

Institute of Inorganic Technology and Environment Engineering, West Pomeranian University of Technology in Szczecin, Pulaskiego 10, 70-322 Szczecin, Poland
Institute for Catalysis, Hokkaido University, N21, W10, Sapporo 001-0021, Japan
Author to whom correspondence should be addressed.
Catalysts 2018, 8(8), 316;
Received: 18 July 2018 / Revised: 28 July 2018 / Accepted: 30 July 2018 / Published: 1 August 2018
(This article belongs to the Special Issue Nanomaterials for Environmental Purification and Energy Conversion)
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. View Full-Text
Keywords: C/TiO2; photocatalysis; solar radiation; disinfection; immobilized catalyst C/TiO2; photocatalysis; solar radiation; disinfection; immobilized catalyst
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Markowska-Szczupak, A.; Rokicka, P.; Wang, K.; Endo, M.; Morawski, A.W.; Kowalska, E. Photocatalytic Water Disinfection under Solar Irradiation by d-Glucose-Modified Titania. Catalysts 2018, 8, 316.

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