title: Ball milled h-BN: an efficient holes transfer promoter to enhance the photocatalytic performance of TiO2.
abstract: High activity hexagonal-BN (h-BN)/TiO(2) composite photocatalysts were prepared by ball milling method. The structural and optical properties of the samples were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectra (DRS), and fluorescence emission spectra. The effect of the loading amount of h-BN and the ball milling time on the photocatalytic degradation of Rhodamine B (RhB) and methylene blue (MB) was investigated. The results indicated that the photocatalytic activity of TiO(2) could be improved substantially by coupling with a proper amount of milled h-BN. The optimal loading amount of h-BN was found to be 0.5 wt% and the milling time was 30 min. Under this condition, the photocatalytic removal efficiencies of TiO(2) for RhB and MB could be increased as high as 15 and 8 times. The role of the milling process and the mechanism for the enhancements was finally discussed in terms of creation of negatively charged h-BN surface and promotion the separation of photoinduced holes, respectively.
authors.affiliation: Department of Chemistry, Huaibei Normal University, Anhui, Huaibei 235000, China. fuxiliang@gmail.com
authors.forename: Xianliang
authors.initials: X
authors.lastname: Fu
authors.forename: Yingfei
authors.initials: Y
authors.lastname: Hu
authors.forename: Yunguang
authors.initials: Y
authors.lastname: Yang
authors.forename: We
authors.initials: W
authors.lastname: Liu
authors.forename: Shifu
authors.initials: S
authors.lastname: Chen
mesh_terms: D001896:Boron Compounds / Q000737:chemistry*; D002384:Catalysis; D008751:Methylene Blue / Q000737:chemistry*; D055668:Photochemical Processes; D012235:Rhodamines / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D001896:Boron Compounds; D012235:Rhodamines; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; C017282:boron nitride; D014025:Titanium; C029773:rhodamine B; D008751:Methylene Blue