Abstract
Extensive research is directed to further prolong the lifetime of charge carriers and to increase the rate of electron transfer for nano‐photoactive catalysts. Especially, spin‐dependent electron‐hole recombination process has gained much attention. However, the direct effect of spin degree on photo‐catalysis performance is largely unexplored, which hinders the advancement of nano‐catalyst design. Here, a model catalyst system is constructed by combing Cu2+, carbon dots (CDs), and layered double hydroxides (LDHs) in order to address the above problems. The results from experimental and theoretical calculations show that: 1) the confined nano‐interlayer of anisotropic LDHs provides Cu‐CDs with highly aligned dipoles and enhanced spin‐orbit coupling, which leads to the forbidden radiative recombination and prolonged exciton lifetime; 2) LDHs as nano‐reactors provide a confined microenvironment for catalysis reaction, which shortens the electron transfer pathway and reduces the exciton loss. Based on these improved properties, the photocatalytic efficiency of Cu‐CDs‐LDHs in photo‐oxidation reaction of 1,4‐dihydro‐2,6‐dimethylpyridine‐3,5‐dicarboxylateis (1,4‐DHP) is 1.54 times higher than pure CDs.
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