In situ growth of lead-free perovskite Cs2AgBiBr6 on a flexible ultrathin carbon nitride sheet for highly efficient photocatalytic benzylic C(sp3)−H bond activation

The CABB-80@UCNT sample exhibits excellent photocatalytic performance for the oxidation of toluene, with a total conversion rate 10.7 and 6 times higher than that of UCNT and CABB, respectively, and its selectivity can exceed 85%. The outstanding performance of CABB-80@UCNT is attributed to the synergistic effect of size modulation and energy band engineering.