• NA WANG

      Articles written in Bulletin of Materials Science

    • Synthesis and visible-light photocatalytic activity of brookite/BiOBr

      ZHITENG WANG NING LIU HUIDONG XIE JIE LI YAJUAN ZHAO NA WANG

      More Details Abstract Fulltext PDF

      Brookite TiO$_2$ was synthesized and BiOBr was supported on the surface of brookite TiO$_2$ by a hydrothermal method. X-ray diffraction and X-ray photoelectron spectroscopy analyses of the composites confirmed the formation of brookite TiO$_2$/BiOBr. Transmission electron microscopy results confirmed the as-prepared composites were nano-sized.The optimum loading amount of BiOBr was 30%. The photocatalytic results show that the degradation efficiency of rhodamine B by titanite TiO$_2$/BiOBr (30%) under visible-light irradiation for 2 h is close to 100%. ${\bullet}$O$_2$$^–$ and h$^+$ are themain active species during the photocatalytic process. The improvement of photocatalytic activity might be because theformation of p–n hetero-junction enhanced the separation efficiency of photogenerated electron–hole pairs. The photocurrentdensity of the brookite/BiOBr (30%) was about 2 times higher than that of pure brookite.

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