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Constructing heterostructured photocatalysts is an efficient method to improve photocatalytic carbon dioxide (CO 2 ) reduction. Herein, holey g-C 3 N 4 (HGN) with rich amino groups (−NH x ) was hybridized with NH 2 -UiO-66 (NUZ) via a facile in situ growth method. NUZ nanocrystals were anchored on HGN via NHx−Zr−O chemical bonding, leading to the uniform dispersion and avoiding the leaching of NUZ, thus showing excellent stability in photocatalysis. The chemically bonded interfacial charge transfer effect originated from the NHx−Zr−O formation efficiently accelerated the separation and migration of charge carriers, improving the photoactivity. Benefiting from the NHx−Zr−O formation, the optimized NUZ/HGN-35% heterojunctions exhibited outstanding activity in the photoreduction of CO 2 to CO (31.6 μmol g −1 h −1 ), which was about 2 and 3 times higher than that of pure NUZ and HGN under visible-light irradiation. This study is expected to provide useful insights for constructing composites with strong interaction for CO 2 reduction, H 2 production, and N 2 reduction.

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