摘要
An efficient visible-light-responsive BiOBr/TiO_2 heterojunction nanocomposite was fabricated successfully using in-situ depositing technique at room temperature by introducing Bi OBr onto the surface of TiO_2 nanobelts pre-prepared by hydrothermal reaction and etched with H_2SO_4. The obtained particles were characterized by XRD, SEM, TEM, XPS, UV-Vis DRS and PL techniques. BiOBr/TiO_2 heterojunction nanocomposites with different mass ratios of m(Bi OBr)/m(TiO_2) were discussed in order to get the best photocatalytic activity, and BiOBr/TiO_2-1.0 was proved to be the optimal mass ratio. BiOBr/TiO_2-1.0 exhibited excellent photocatalytic activity in the degradation of Rh B compared with TiO_2 nanobelts, pure Bi OBr and the mechanical mixture of TiO_2 nanobelts and Bi OBr. At last, a possible mechanism of photocatalytic enhancement was proposed.
An efficient visible-light-responsive BiOBr/TiO2 heterojunction nanocomposite was fabricated successfully using in-situ depositing technique at room temperature by introducing BiOBr onto the surface of TiO2 nano- belts pre-prepared by hydrothermal reaction and etched with H2SO4. The obtained particles were characterized by XRD, SEM, TEM, XPS, UV-Vis DRS and PL techniques. BiOBr/TiO2 heterojunction nanocomposites with different mass ratios of m （BiOBr）/m （TiO2） were discussed in order to get the best photocatalytie activity, and BiOBr/TiO2-1.0 was proved to be the optimal mass ratio. BiOBr/TiO2-1.0 exhibited excellent photocatalytic activity in the degradation of RhB compared with TiO2 nanobelts, pure BiOBr and the mechanical mixture of TiO2 nanobelts and BiOBr. At last, a possible mechanism ofphotocatalytic enhancement was proposed.
基金
Supported by the National Basic Research Program of China("973"Program,No.2014CB239300,No.2012CB720100)
National Natural Science Foundation of China(No.21406164,No.21466035)
Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20110032110037,No.20130032120019)
