Improving charge carriers separation to achieve high photoconversion efficiency in heterogeneous photocatalysts is highly desirable. Herein, heterostructured [email protected] double-layered porous nanotubes (PNTs), in which the spatially separated reduction and oxidation reaction sites lie on the outer and inner shell, respectively, are fabricated through a robust self-template conversion strategy. After selective photo-deposition of Ni and CoO_x as dual cocatalysts, Ni nanoparticles as electron collectors and reduction reaction sites are loaded on the outer shell, while CoO_x nanoparticles as hole collectors and oxidation reaction sites are loaded on the inner shells. As a result, a novel CoO_x/[email protected]/Ni photocatalyst is obtained and shows high visible-light-driven photocatalytic hydrogen production activity owing to the synergistic effect of self-template-derived thin mesoporous heterojunctions and photo-deposition-derived spatially separated dual cocatalysts, which can significantly provide driving force for the ordered transfer of photogenerated electrons and holes toward opposite direction and promote the surface catalytic reaction. Additionally, the facile strategy can be broadened to the preparation of CoO_x/[email protected]/Ni PNTs with enhanced photocatalytic activity.

改进载流子分离以在多相光催化剂中实现高光转换效率是非常可取的。在此，异质结构 [电子邮件保护] 双层多孔纳米管 (PNT)，其中空间分离的还原和氧化反应位点分别位于外壳和内壳上，是通过稳健的自模板转换策略制造的。选择性光沉积Ni和CoO _x作为双助催化剂后，作为电子收集器和还原反应位点的Ni纳米粒子负载在外壳上，而作为空穴收集器和氧化反应位点的CoO _x纳米粒子负载在内壳上。因此，一种新颖的 CoO _x/[email protected]/Ni 光催化剂由于自模板衍生的薄介孔异质结和光沉积衍生的空间分离双助催化剂的协同作用，获得并显示出高可见光驱动的光催化制氢活性，这可以显着为光生电子和空穴向相反方向有序转移提供驱动力，促进表面催化反应。此外，该简便策略可以扩展到制备具有增强光催化活性的 CoO _x /[email protected]/Ni PNT。