Designer hydrogenated wrinkled Yolk@Shell TiO2 architectures: towards advanced room temperature visible light selective photocatalysts
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Author
Ziarati, Abolfazl
Badiei, Alireza
Luque, Rafael
Ouyang, Weiyi
Date
2019Subject
TiO2Photo-catalysis
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Smart architectures of TiO2 are attracting increasing attention due to their outstanding properties in a broad range of
fields. Herein, we report the preparation of an unprecedented yolk/shell wrinkled TiO2 architecture with excelling
photocatalytic activities under visible light irradiation. This method includes solvothermal, partial etching and hydrogen
treatment sequential preparation steps. The solvothermal step lead to yolk@shell TiO2 (Y@S-TiO2) structures which can
generate a multi reflection of incident light so as to promote an efficient light harvesting due to an enhanced surface area
and light scattering ability based on the hydrothermal alkaline partial etching. The hydrogen treatment process generated
Ti3+ species on the surface of TiO2 which facilitate electron-hole separation, decreasing the band gap of titania to visible
region. The resultant yolk@hydrogenated wrinkled shell TiO2 architecture exhibited a high efficiency in visible light
oxidation of alcohols to the corresponding aldehydes (up to 90 in conversion, 97% in selectivity).