ARTICLE
This journal isA series of photocatalysts of three-dimensionally ordered macroporous (3DOM) TiO 2supported core-shell structural Pt@CdS nanoparticles were facilely synthesized by the gas bubbling-assisted membrane reduction-precipitation (GBMR/P) method. All the catalysts possess well-defined 3DOM structure with the interconnected networks of spherical voids, and the Pt@CdS core-shell nanoparticles with different molar ratios of Cd/Pt are well dispersed and supported on the inner wall of uniform macropore. 3DOM structure can enhance the light-harvesting efficiency due to increasing the distance of the light path by enhancing random light scattering. And the all-solid-state Z-scheme system with CdS(shell)-Pt(core)-TiO 2 (support) nanojunction is favourable for the separation of photogenerated electrons and holes because of the vectorial electron transfer of TiO 2 →Pt→CdS. 3DOM Pt@CdS/TiO 2 catalysts exhibit super photocatalytic performance for CO 2 reduction to CH 4 under the simulated solar irradiation. Among the as-prepared catalysts, 3DOM Pt@CdS/TiO 2 -1 catalyst with the moderate thickness of CdS nanolayer shell shows the highest photocatalytic activity and selectivity for CO 2 reduction, e.g., its formation rate of CH 4 is 36.8 μmol g -1 h -1 and its selectivity to CH 4 production by CO 2 reduction is 98.1 %. The design and versatile synthetic approach of all-solid-state Z-scheme system on the surface of 3DOM oxides are expected to throw new light on the fabrication of highly efficient photocatalyst for CO 2 reduction to hydrocarbon.