It still is difficult issue to exploit the efficient photocatalysts that can response broad solar spectrum from visible to near-infrared (NIR) region. Herein, the H-TiO₂/BiOCl heterojunctions are constructed firstly by a facile solvothermal method. The transfer and separation efficiency of charge carriers are improved distinctly owing to the modification effects of H-TiO₂ nanoparticles on the surface of BiOCl flower spheres. Compared to BiOCl and H-TiO₂, H-TiO₂/BiOCl heterojunctions remarkably exhibit the enhanced photocatalytic activity for degrading tetracycline hydrochloride (TC-HCl) and methyl orange (MO) dye under the visible and NIR light, respectively. Moreover, we discuss the effect of H-TiO₂/BiOCl heterojunction on the physical and photoelectrochemical properties, as well as the possible produced intermediates and degradation mechanism of TC-HCl in detail.

利用有效的光催化剂来响应从可见光到近红外（NIR）区域的宽广太阳光谱仍然是一个难题。在此，首先通过简便的溶剂热法构建H-TiO ₂ / BiOCl异质结。H-TiO ₂纳米粒子在BiOCl花球表面的修饰作用明显改善了电荷载流子的转移和分离效率。与BiOCl和H-TiO _2相比，H-TiO ₂ / BiOCl异质结在可见光和近红外光下分别表现出增强的降解四环素盐酸盐（TC-HCl）和甲基橙（MO）染料的光催化活性。此外，我们讨论了H-TiO _2的作用/ BiOCl异质结对物理和光电化学性质的影响，以及可能产生的中间体和TC-HCl的降解机理。