We report the preparation and photoelectrochemical performance of three dimensional (3D) flower-like Bi₂MoO₆/Bi₅O₇Br nanosphere deposited on TiO₂ NTA surface by a solvothermal method. The CTAB surfactant working as the morphology controlling reagent and bromine resource played significant roles in the Bi₂MoO₆/Bi₅O₇Br crystal growth and photocatalytic pollutant removal. The S-0.15 sample with hierarchical heterostructures showed the excellent photoelectric conversion and waste water purification properties. The visible light photocurrent and photovoltage of S-0.15 achieved 0.21 mA/cm² and -0.37 V, and 73.43%, 47.77%, 93.81% and 69.40% of RhB, MO, MB and Cr(VI) underwent removal under solar irradiation. The O₂^-• radicals were the main active groups for RhB and MO decoloration, and all radicals including O₂^-•, •OH and hole could achieve the MB degradation. Moreover, the mechanism for the electron transportation was proposed by the calculation of energy band edge location in the triple photocatalyst. The novel triple photocatalyst with hierarchical structures would provide the platform for the efficient solar cells and photocatalysts.

我们报道了通过溶剂热法沉积在TiO ₂ NTA表面的三维（3D）花状Bi ₂ MoO ₆ / Bi ₅ O ₇ Br纳米球的制备和光电化学性能。CTAB表面活性剂作为形态控制剂和溴源，在Bi ₂ MoO ₆ / Bi ₅ O ₇ Br晶体的生长和光催化污染物的去除中起着重要作用。具有分层异质结构的S-0.15样品显示出优异的光电转换和废水净化性能。S-0.15的可见光光电流和光电压达到0.21 mA / cm ²-0.37 V和73.43％，47.77％，93.81％和69.40％的RhB，MO，MB和Cr（VI）在太阳照射下进行了去除。将O ₂ ^- •激进分子对罗丹明B和MO脱色的主要活性基团，和所有的基团，包括Ø ₂ ^- •，•OH和孔可以实现MB降解。此外，通过计算三重光催化剂中的能带边缘位置，提出了电子传输的机理。具有分级结构的新型三重光催化剂将为高效的太阳能电池和光催化剂提供平台。