title: Epitaxial growth route to crystalline TiO2 nanobelts with optimizable electrochemical performance.
abstract: Anatase TiO(2) nanobelts with 13 nm in thickness have been successfully synthesized via an epitaxial growth chemical transformation, in which the primary H(2)Ti(3)O(7) nanobelt frameworks can be preserved. The phases, crystal structures, morphologies, and growth behavior of both the precursory (Na(2)Ti(3)O(7) and H(2)Ti(3)O(7)) and resultant products (TiO(2)) are characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and selected area electron diffraction (SAED). Detailed investigation of the formation mechanism of the TiO(2) nanobelts indicates epitaxial nucleation and oriented growth of textured TiO(2) inside the nanobelts. TiO(2) nanocrystals prefer certain epitaxial growth direction due to the structural matching of (110)(H2Ti3O7)//(101)(TiO2). We demonstrated that the initial reversible capacity of these TiO(2) nanobelts attained 225 mA h/g. Furthermore, the nanobelts exhibit high power density along with excellent cycling stability in their application as hybrid electrochemical cells.
authors.affiliation: Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, Heilongjiang, 150001, China. gaopeng@hrbeu.edu.cn
authors.forename: Peng
authors.initials: P
authors.lastname: Gao
authors.forename: Di
authors.initials: D
authors.lastname: Bao
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.forename: Yujin
authors.initials: Y
authors.lastname: Chen
authors.forename: Longqiang
authors.initials: L
authors.lastname: Wang
authors.forename: Shaoqiang
authors.initials: S
authors.lastname: Yang
authors.forename: Guorui
authors.initials: G
authors.lastname: Chen
authors.forename: Guobao
authors.initials: G
authors.lastname: Li
authors.forename: Yuzeng
authors.initials: Y
authors.lastname: Sun
authors.forename: Wei
authors.initials: W
authors.lastname: Qin
mesh_terms: D003460:Crystallization; D055664:Electrochemical Techniques / Q000295:instrumentation*; D049329:Nanostructures / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: C009495:titanium dioxide; D014025:Titanium