title: Hydrothermal etching fabrication of TiO2@graphene hollow structures: mutually independent exposed {001} and {101} facets nanocrystals and its synergistic photocaltalytic effects.
abstract: Highly exposed facets TiO2 attracts enormous attention due to its excellent separation effect of photogenerated electron-hole pairs and induced high performance of photocatalytic activity. Herein, a novel hydrothermal etching reaction was used to synthesize graphene-wrapped TiO2 hollow core-shell structures. Different with the reported co-exposed facets TiO2 single crystal nanoparticles, the present TiO2 core layer is composed by the mutually independent exposed {001} and {101} facets nanocrystals. Combined with the reduced graphene oxide shell layer, this graphene-wrapped TiO2 hollow core-shell structures formed a Z-scheme photocatalytic system, which possess simultaneously the high charge-separation efficiency and strong redox ability. Additionally, the as-prepared samples show a higher absorption property for organic molecules and visible light due to the presence of graphene. All of these unique properties ensure the excellent photocatalytic activity for the graphene-wrapped TiO2 hollow structures in the synergistic photo-oxidation of organic molecules and photo-reduced of Cr(VI) process. The TiO2 core composed with mutually independent exposed {001} and {101} facets nanocrystals is propose to play an important role in the fabrication of this Z-scheme photocatalytic system. Fabrication of Z-scheme photocatalytic system based on this unique exposed facets TiO2 nanocrystals will provides a new insight into the design and fabrication of advanced photocatalytic materials.
authors.affiliation: School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China.
authors.forename: Hui
authors.initials: H
authors.lastname: Liu
authors.affiliation: School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Liu
authors.affiliation: School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China.
authors.forename: Zhiling
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China.
authors.forename: Xiaonan
authors.initials: X
authors.lastname: Dong
authors.affiliation: School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, P. R. China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Liu