title: Electrospun nanofibers of TiO2/CdS heteroarchitectures with enhanced photocatalytic activity by visible light.
abstract: Herein, we have demonstrated that the electrospun nanofibers of TiO(2)/CdS heteroarchitectures could be fabricated through combining electrospinning technique with hydrothermal process. The configuration, crystal structure, and element composition of the as-prepared TiO(2)/CdS heteroarchitectures were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), X-ray diffraction (XRD), resonant Raman spectrometer, X-ray photoelectron spectroscopy (XPS). The results indicated that the high-density hexagonal wurtzite CdS crystalline particles of ca. 6-40 nm in diameter were uniformly and closely grown on anatase TiO(2) nanofibers. Especially, the light-absorption properties as well as photocatalytic characteristics of pure TiO(2) nanofibers and TiO(2)/CdS heteroarchitectures with different amount loading of CdS were also investigated. The absorption of TiO(2)/CdS heteroarchitectures was extended to the visible due to effective immobilization of sensitizing agent CdS on TiO(2). In contrast with the pure TiO(2) nanofibers, the TiO(2)/CdS heteroarchitectures showed excellent photocatalytic activity by using rhodamine B dye as a model organic substrate under visible-light irradiation. It was worth noting that the cooperative photocatalytic mechanism of the TiO(2)/CdS heteroarchitectures was also discussed.
authors.affiliation: School of Chemical Engineering, Changchun University of Technology, 17 Yanan Road, Changchun 130012, People's Republic of China.
authors.forename: Chunyan
authors.initials: C
authors.lastname: Su
authors.forename: Changlu
authors.initials: C
authors.lastname: Shao
authors.forename: Yichun
authors.initials: Y
authors.lastname: Liu
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D002384:Catalysis; D006358:Hot Temperature; D008027:Light; D057139:Nanofibers / Q000737:chemistry*; D010316:Particle Size; D010777:Photochemistry; D013440:Sulfides / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D013440:Sulfides; C034939:cadmium sulfide; C009495:titanium dioxide; D014025:Titanium