The photocatalytic CO₂ and H₂O conversion into CO and hydrocarbons over the semiconductors catalysts is an effective way to alleviate environmental pollution and resource shortage currently. Herein, three-dimensional ordered macroporous (3DOM) TiO₂-supported two-dimensional layered MoS₂ (MoS₂/3DOM-TiO₂) as two isolated photochemical systems were proposed to form heterojunction structure. The diffuse reflection of photonic crystal microstructure can raise the adsorption efficiency of visible light. The formation of TiO₂-MoS₂ heterojunction is favorable to the enhancing separation efficiency of photoexcitation electron and hole pairs. The binary MoS₂/3DOM-TiO₂ photocatalyst shows the higher catalytic performance for visible-light driven reduction of CO₂ in the range of 420−900 nm. MoS₂/3DOM-TiO₂-1.5 photocatalyst shows the highest maximum formation yields of CO (22.6 μmol g^-1) as well as CH₄ (11.6 μmol g^_-1) products during 8 h, then its apparent quantum efficiency value is 6.7 %, which is far higher than the photosynthesis efficiency of green plants. The heterojunction of MoS₂/3DOM-TiO₂ photocatalysts with enhancing light adsorption and electron-hole separation efficiency is expected to provide more extensive reference for the evolution of high-efficient photocatalyst for CO₂ conversion.

在半导体催化剂上光催化CO ₂和H ₂ O转化为CO和碳氢化合物是目前缓解环境污染和资源短缺的有效途径。在此，提出了三维有序大孔（3DOM）TiO ₂支撑的二维层状MoS ₂（MoS ₂ /3DOM-TiO ₂）作为两个孤立的光化学体系以形成异质结结构。光子晶体微结构的漫反射可以提高可见光的吸附效率。TiO ₂ -MoS ₂的形成异质结有利于提高光激发电子和空穴对的分离效率。二元MoS ₂ /3DOM-TiO ₂光催化剂在420-900 nm范围内对可见光驱动的CO ₂还原显示出更高的催化性能。MoS ₂ /3DOM-TiO ₂ -1.5 光催化剂在8 h内的CO（22.6 μmol g ^-1）和CH ₄（11.6 μmol g ^_-1）产物的最大生成率最高，表观量子效率值为6.7 %，远高于绿色植物的光合作用效率。MoS ₂ /3DOM-TiO ₂异质结具有增强光吸附和电子-空穴分离效率的光催化剂有望为CO ₂转化高效光催化剂的发展提供更广泛的参考。