A hybrid titania-silica cold-setting sol has been developed that can be deposited onto a wide variety of surfaces without the need for high-temperature fixing and that is suitable for material printing deposition. Thin hybrid titania-silica coatings were patterned onto glass and PET substrates by inkjet printing. Well-defined hybrid titania-silica patterns, with thicknesses ranging from 40 to 400 nm, were fabricated by overprinting 1 to 10 layers. Excellent mechanical, optical, and photocatalytic properties were observed, making the reported material well suited for the fabrication of transparent self-cleaning coatings both on mineral and organic substrates. The printed patterns exhibit photoelectrochemical activity that can be further improved by thermal or photonic curing. A concept of fully printed interdigitated photoelectrochemical cells on flexible PET substrates utilizing the reported hybrid photocatalyst is disclosed as well.

§Groupe d'Étude de la Matière Condensée CNRS Université de Versailles 45 avenue des États Unis 78035 Versailles CEDEX France

†Faculty of Chemistry Brno University of Technology Purkynova 118 612 00 Brno Czech Republic

‡School of Environmental Sciences University of Nova Gorica Vipavska 13 SI 5000 Rožna dolina Nova Gorica Slovenia

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Cold-Setting Inkjet Printed Titania Patterns Reinforced by Organosilicate Binder