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Efficient charge separation is a critical factor for solar energy conversion by heterogeneous photocatalysts. This paper describes the complete spatial separation of oxidation and reduction cocatalysts to enhance the efficacy of charge separation and surface reaction. Specifically, we design Pt@TiO 2 @MnO  x  hollow spheres (PTM-HSs) with Pt and MnO  x  loaded onto the inner and outer surface of TiO 2 shells, respectively. Pt favours electron trapping, while MnO  x  tends to collect holes. Upon generation from TiO 2 , electrons and holes flow inward and outward of the spherical photocatalyst, accumulating on the corresponding cocatalysts, and then take part in redox reactions. Combined with other advantages, such as the large surface area and appropriate pore size, the PTM-HSs exhibit high efficiency for the photocatalytic oxidation of water and benzyl alcohol. The mechanism of the oxidation process of benzyl alcohol over the photocatalyst is also presented.

chemical science

Spatial separation of oxidation and reduction co-catalysts for efficient charge separation: Pt@TiO<sub>2</sub>@MnO<sub>x</sub> hollow spheres for photocatalytic reactions

Spatial separation of oxidation and reduction co-catalysts for efficient charge separation: Pt@TiO2@MnOx hollow spheres for photocatalytic reactions

Spatial separation of oxidation and reduction co-catalysts for efficient charge separation: Pt@TiO₂@MnO_x hollow spheres for photocatalytic reactions