Morphology is crucial component to achieve high photon utilization efficiency and efficient photocatalytic activity. In this work, novel honeycomb-like inverse opals were fabricated by a simple sol-gel method combined with a self-assembly polystyrene (PS) opal as template. The obtained materials exhibit unique 3D ordered porous structure with center-to-center distance of about 200 nm, which lead to periodic modulations of light propagation and strengthen light absorption of materials. Photocatalytic activity of TiO₂ with morphology of honeycomb and bulk, with or without doping Mg²⁺ was comparatively investigated by disinfection of bacteria and photodegradation of organic pollutant. Morphology evolution of TiO₂ from bulk to honeycomb would increase specific surface area and strengthen light adsorption, which could largely strengthen photocatalytic activity of honeycomb-like TiO₂. After Mg²⁺ is doped, it was found that Mg-TiO₂ systems exhibited much higher activity than their counterpart due to decreased band gap. In this way, water disinfection of 100% inactivation of bacteria was achieved under visible light. Highly reactive h⁺ and O₂⁻ were found to be major reactive species and a possible mechanism was reasonably proposed.

形态是实现高光子利用效率和有效光催化活性的关键组成部分。在这项工作中，新颖的蜂窝状反蛋白石是通过简单的溶胶-凝胶法与自组装聚苯乙烯（PS）蛋白石相结合制成的。所获得的材料表现出独特的3D有序多孔结构，中心距大约为200 nm，这导致光传播的周期性调制并增强了材料的光吸收。通过细菌消毒和有机污染物的光降解，比较研究了蜂窝状和块状，掺杂或不掺杂Mg ²⁺的TiO _2的光催化活性。TiO _2的形貌演变从块状到蜂窝状，将增加比表面积并增强光吸收，从而可大大增强蜂窝状TiO _2的光催化活性。掺杂Mg ²⁺后，发现由于带隙减小，Mg-TiO ₂系统显示出比其对应的系统高得多的活性。以这种方式，在可见光下实现了100％灭活细菌的水消毒。高反应性^ h ⁺和Ø ₂ ^-被认为是主要的活性物质和可能的机理进行了合理的建议。