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Effect of Titania Regular Macroporosity on the Photocatalytic Hydrogen Evolution on Cd 1− x Zn x S/TiO 2 Catalysts under Visible Light
Author(s) -
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.
Publication year - 2015
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201500897
Subject(s) - photocatalysis , x ray photoelectron spectroscopy , materials science , spectroscopy , aqueous solution , high resolution transmission electron microscopy , visible spectrum , catalysis , diffuse reflectance infrared fourier transform , transmission electron microscopy , chemical engineering , nuclear chemistry , nanotechnology , chemistry , optoelectronics , engineering , biochemistry , physics , quantum mechanics
Multiphase photocatalysts Cd 1− x Zn x S/TiO 2 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, N 2 adsorption at 77 K, X‐ray photoelectron spectroscopy, and UV/VIS spectroscopy. The photocatalytic activity was tested in a batch reactor for the H 2 evolution reaction from aqueous solutions of Na 2 S/Na 2 SO 3 under visible‐light irradiation ( λ =450 nm). The highest achieved photocatalytic activity was 1.8 mmol H 2 per gram of photocatalyst per hour. The regular porous structure of titania was demonstrated to enhance the photocatalytic activity and stability of Cd 0.4 Zn 0.6 S/TiO 2 samples.