Mesoporous TiO₂ nanomaterials have been investigated for decades; however, most endeavors have been focused on the exploration of their potentials in various applications, and the fundamental research for preparing mesoporous TiO₂ in a highly controllable manner remains unfruitful. Herein, we report a facile pressure-driven oriented assembly approach to synthesize an unprecedented type of dehiscent mesoporous TiO₂ microspheres with radial mesopore channels and oriented rutile crystallites. By varying the concentrated HCl amount, we have been able to produce TiO₂ microspheres with well-controlled rutile/anatase phase ratio. By further manipulating the reaction conditions including solvent evaporation time and hydrothermal temperature, the oriented growth with tunable crevices can also be well manipulated. Such dehiscent mesoporous TiO₂ microspheres have exhibited great permeability and excellent photocatalytic properties for H₂ generation. We believe that the high structural complexity and predictability of this method offers great opportunities in enhancing the performance of TiO₂-based materials.

介孔TiO ₂纳米材料已被研究了数十年。然而，大多数努力集中在探索其在各种应用中的潜力，并且以高度可控的方式制备介孔TiO ₂的基础研究仍然没有成果。在这里，我们报告了一种简便的压力驱动定向组装方法，以合成前所未有的具有径向中孔通道和定向金红石微晶的开裂介孔TiO ₂微球。通过改变浓盐酸的量，我们已经能够生产TiO ₂金红石/锐钛矿相比可控的微球。通过进一步控制反应条件，包括溶剂蒸发时间和水热温度，还可以很好地控制带有可调节缝隙的定向生长。这种开裂的介孔TiO ₂微球对于H ₂生成表现出大的渗透性和优异的光催化性能。我们相信该方法的高结构复杂性和可预测性为增强TiO ₂基材料的性能提供了巨大的机会。