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Visible light photocatalytic CO 2 conversion is a promising solution to global warming and energy shortage. Herein, we build a well-designed bridge-like nanostructure, that is, the phosphonated Ru complex (RuP) light absorber–TiO 2 bridge–Cu catalyst. In this nanostructure, brookite TiO 2 serving as a bridge is spatially connected to the RuP and Cu on each of its sides and could thus physically separate the photoexcited holes and electrons over the RuP and Cu, respectively. Given its effec-tive charge separation, this RuP–TiO 2 –Cu assembly exhibits superior CO 2 photoreduction activity relative to RuP–SiO 2 –Cu under visible light irradiation ( λ > 420 nm). The catalytic activity is further optimized by adopting brookite TiO 2 with vari-ous electronic band structures. Results reveal the rapid movement of electrons from the RuP through the conduction band of TiO 2 and finally to the Cu surface. This property is crucial in CO 2 photoreduction activity.