Effect of Titania Regular Macroporosity on the Photocatalytic Hydrogen Evolution on Cd1−xZnxS/TiO2 Catalysts under Visible Light. Issue 24 (8th October 2015)

• Record Type: Journal Article
• Authors: Kozlova, Ekaterina A.; Kurenkova, Anna Yu.; Semeykina, Victoria S.; Parkhomchuk, Ekaterina V.; Cherepanova, Svetlana V.; Gerasimov, Evgeny Yu.; Saraev, Andrey A.; Kaichev, Vasily V.; Parmon, Valentin N.
• Is Part Of: ChemCatChem. Volume 7:Issue 24(2015:Dec.)
• Page Start: 4108
• Page End: 4117
• Publication Date: 2015-10-08
• Subjects: 3-D ordered materials -- hydrogen production -- photocatalysis -- template synthesis -- titania; Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.201500897
• Languages: English
• ISSNs: 1867-3880

Abstract

Abstract: Multiphase photocatalysts Cd1− x Zn x S/TiO2 were synthesized through the deposition of solid solutions of cadmium and zinc sulfides on the surface of titania samples with different porous structures, including a 3D‐ordered meso/macroporous structure. The photocatalysts were characterized by a wide range of experimental techniques: X‐ray diffraction, high‐resolution transmission electron microscopy combined with energy‐dispersive X‐ray spectroscopy, N2 adsorption at 77 K, X‐ray photoelectron spectroscopy, and UV/VIS spectroscopy. The photocatalytic activity was tested in a batch reactor for the H2 evolution reaction from aqueous solutions of Na2 S/Na2 SO3 under visible‐light irradiation ( λ =450 nm). The highest achieved photocatalytic activity was 1.8 mmol H2 per gram of photocatalyst per hour. The regular porous structure of titania was demonstrated to enhance the photocatalytic activity and stability of Cd0.4 Zn0.6 S/TiO2 samples. Abstract : Turn on the (visible) light : TiO2 samples were synthesized by using a polystyrene template and a template‐free technique and then photocatalysts Cd0.4 Zn0.6 S/TiO2 with a different porosity were prepared. It was shown that the regular porous structure of TiO2 benefits the activity of Cd0.4 Zn0.6 S/TiO2 . Photocatalytic activity ( λ =450 nm) 1800 μmol H2 g −1 h −1 was achieved.