Sluggish charge separation dynamics resulting from the amorphous structure and the lack of driving force for graphitic carbon nitride (GCN) limits its highly effective CO photoreduction performance. Herein, a built-in electric field (BEF) was constructed for a well-designed CCN/Ni hybrid composed of crystalline carbon nitride (CCN) and a metal complex, 2,2'-bipyridine-4,4'-dicarboxylic acid NiBr (dcabpyNiBr), to steer charge carrier separation and migration. The CCN/Ni hybrid was synthesized a solution-dispersion and molten-salt two-step approach, displaying an improved CO photoreduction to CO rate of 8.64 μmol g h. experimental results and theoretical simulations further investigated the relationships between BEF and photocatalytic activity. This work demonstrates an effective strategy to obtain high-efficiency photocatalytic systems by engineering the crystal structure and constructing a BEF.
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http://dx.doi.org/10.1039/d4nr03586k | DOI Listing |
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