title: Comparative study of photocatalytic and photoelectrocatalytic properties of alachlor using different morphology TiO2/Ti photoelectrodes.
abstract: Wormhole-shaped TiO(2)/Ti (WT) and nanotube-shaped TiO(2)/Ti (TNT) photoelectrodes were prepared by anodic oxidation method. The morphology and structure were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). It was found that both crystal types of WT and TNT photoelectrodes were composed of anatase and rutile TiO(2) phases; however TNT photoelectrodes had highly ordered nanostructure. The photoelectrochemical (PECH) and photoelectrocatalytic (PEC) properties of WT and TNT photoelectrodes were investigated by photocurrent transient, open-circuit potential and degradation rate of alachlor under the artificial solar light illumination. All results showed that TNT photoelectrodes prepared in NaF-Na(2)SO(4) solution have more excellent photoelectron properties than WT photoelectrodes prepared in H(2)SO(4) solution. The photocatalytic (PC) and PEC experiments of alachlor showed that PC and PEC activities of TNT photoelectrodes were superior to WT photoelectrodes. At applied bias potentials the degradation rate of alachlor at TNT photoelectrodes increased significantly to 94.5%. The higher PC and PEC performance of TNT photoelectrodes were ascribed to the long-range ordered structure and short-orientation diffusion distance of photogenerated carries.
authors.affiliation: State Key Laboratory of Urban Water Resources and Environment, Department of Environmental Science and Engineering Harbin Institute of Technology, Huanghe Road 73, Nangang District, Harbin 150090, China.
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Xin
authors.forename: Huiling
authors.initials: H
authors.lastname: Liu
authors.forename: Lei
authors.initials: L
authors.lastname: Han
authors.forename: Yabin
authors.initials: Y
authors.lastname: Zhou
mesh_terms: D000081:Acetamides / Q000032:analysis*; D002384:Catalysis; D004058:Diffusion; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D017665:Hydroxyl Radical; D008027:Light; D049329:Nanostructures / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods; D010777:Photochemistry / Q000379:methods*; D011199:Potentiometry / Q000379:methods; D015203:Reproducibility of Results; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D000081:Acetamides; C009495:titanium dioxide; C000188:alachlor; D017665:Hydroxyl Radical; D014025:Titanium