Selective photocatalytic CO2 discount (PCR) to CH4 stays difficult because of the sluggish cost switch kinetics and the concerned sophisticated C1 intermediates. Herein, the intentionally engineering Lewis acid-base interfaces in Cu2S/ZnIn2S4 hole hetero-nanocages (HHNCs) had been constructed, and the improved PCR exercise and selectivity has been achieved as a result of accelerated electron switch and stabilized intermediates. Each experimental and theoretical outcomes have demonstrated the development of a Lewis base interface with Cu2S and a Lewis acid interface with ZnIn2S4, which exhibit robust CO2 adsorption and discount of the Gibbs free vitality within the hydrogenation step (*CO to *CHO). As a consequence, a CH4 yield of 23.3 µmol g−1 h−1 underneath seen mild irradiation (λ > 400 nm) has been obtained with the Cu2S/ZnIn2S4 HHNCs, roughly 13.7, 10.1 and 6.3 occasions larger than that of naked Cu2S, ZnIn2S4 and bodily combined pattern (Cu2S/ZnIn2S4-mix), respectively. The product selectivity of CH4 is as excessive as 93.2%, in sharp distinction with 59.5% for Cu2S/ZnIn2S4-mix, 53.1% for Cu2S and 35.4% for ZnIn2S4. This work demonstrates an rational technique to engineer heterogenous Lewis acid-base interfaces for bettering PCR exercise and selectivity.
